6th Class General Science Unit 9 MCQs | Electricity (بجلی) | PakMCQs

Static electricity is correct because rubbing causes stationary electrical charges to build up on the cat's fur.

It gets charged by rubbing is correct because friction between our body and the wool blanket transfers and accumulates electrical charges.

When they are rubbed is correct because friction provides the necessary energy to move electrons between different surfaces.

i) negatively ii) positive is correct because the plastic comb pulls negative electrons away from the dry hair.

They have the same charge is correct because like charges naturally exert a repulsive force on each other.

They cannot have same charges on both is correct because electron transfer makes one body positive (loses electrons) and the other negative (gains electrons).

Electrons transfer from one body to another is correct because friction physically relocates outer-shell electrons from one surface to another.

Some mass is correct because although extremely tiny, electrons are physical subatomic particles with measurable mass.

Some mass is also transferred is correct because moving physical particles (electrons) automatically relocates their physical mass as well.

Changes slightly is correct because gaining or losing electrons alters the total atomic mass of the objects by a tiny fraction.

Remains same is correct because the mass lost by one body is exactly equal to the mass gained by the other.

Negative charge on comb, positive on hair is correct because the plastic material of the comb attracts and holds electrons from the hair.

i) negative ii) positive is correct because the balloon transfers electrons to the hair, making them oppositely charged and causing mutual electrostatic attraction.

Repel each other is correct because electrostatic forces push identical charges apart.

Two (Positive and Negative) is correct because all static and current electrical phenomena are built upon these two opposing types of charge.

They repel each other is correct because electrostatic forces naturally push identical charge fields away from one another.

Attract each other is correct because positive and negative charges pull together due to mutual electrostatic attraction.

Neutral object is correct because equal opposite charges balance out, resulting in a net charge of zero.

Charges cancel each other's effect is correct because positive and negative electrostatic forces neutralize each other completely.

All of the above is correct because an object can have an excess of positive charge, an excess of negative charge, or a balanced net-zero state.

Pepper is correct because the electrostatic force generated on the rubbed spoon is strong enough to attract the lightweight pepper flakes.

Electrostatic induction is correct because the charged plastic spoon induces opposite electrical charges on the nearby pepper flakes, causing attraction.

Pepper is lighter than salt is correct because gravity has a weaker pull on the lighter pepper particles, allowing electrostatic forces to lift them more easily.

Blanket of wool or fleece is correct because friction against wool fibers easily transfers negative electrons to charge the plastic spoon.

Form of energy is correct because electricity represents the physical movement or presence of electric charges used to perform work.

Electricity is correct because modern consumer appliances and industrial machines rely on electrical energy to function.

Build up in one place or flow is correct because electrical charges can either reside statically on a surface or travel dynamically through a conducting path.

Static electricity is correct because the term "static" refers to stationary, non-flowing electric charges accumulated on an object.

Current electricity is correct because the term "current" refers to the continuous physical movement of electric charges through a conductor.

Electrons is correct because electric current in solid conductors is driven by the physical flow of free, negatively charged electrons.

Atom is correct because it is the smallest unit of chemical matter that forms every physical object in existence.

Electrons, protons, and neutrons is correct because these three subatomic particles organize together to form the atomic structure.

Negative charge is correct because electrons are fundamental subatomic particles that carry a single unit of negative electricity.

Positive charge is correct because protons are heavy subatomic particles carrying a single unit of positive electricity.

No charge (neutral) is correct because neutrons contain no net electrical charge and are electrically neutral.

Electrons is correct because they orbit the dense central nucleus within designated electron shells or clouds.

Neutrons and protons is correct because these heavy nucleons are bound tightly together at the center to form the nucleus.

Moves through some materials better than others is correct because materials have vastly different molecular structures and electrical resistances.

Conductors is correct because they contain loose, free-moving electrons that can flow easily to create an electrical current.

Insulators is correct because their atomic structures hold electrons tightly, preventing any flow of electric charge.

Conductor is correct because silver allows electrical current to flow through it very easily.

Conductor is correct because gold is a highly efficient metallic conductor of electricity.

Conductor is correct because copper has low resistance and is widely used to manufacture electrical wires.

Conductor is correct because steel is a metallic alloy that easily conducts electric charges.

Conductor is correct because the dissolved salts in sea water allow it to carry electric currents.

Insulator is correct because glass tightly binds its electrons and blocks any flow of electrical current.

Insulator is correct because plastic does not allow electrons to pass through it, making it ideal for covering wires.

Insulator is correct because ceramic materials possess high electrical resistance and block electrical current.

Insulator is correct because rubber prevents current flow, which is why electricians wear rubber gloves for safety.

Insulator is correct because dry wood does not allow free electrons to move or conduct electricity.

Insulator is correct because cloth fibers do not possess free electrons to conduct electricity.

Insulator is correct because paper fibers prevent any movement of electrical charge.

Insulator is correct because wool is an organic fiber that restricts the flow of electric charges.

Insulator is correct because cork is a woody material that possesses extremely high resistance to electrical current.

Electric current is correct because it is defined as the continuous physical movement of electric charge carriers through a conducting path.

Electrical energy is correct because moving charged particles transmit usable electrical power from the source to appliances.

Cell (battery) is correct because electrochemical cells are designed to hold chemical energy that can be converted into electricity when needed.

Negative to positive terminal is correct because negatively charged electrons are repelled by the negative terminal and attracted to the positive terminal of a cell.

Ammeter is correct because it is designed to measure the rate of electric current flowing through a circuit path in amperes.

Cell is correct because a single electrochemical unit generates electric current through internal chemical reactions.

Battery is correct because a battery is officially defined as a combination of two or more electrochemical cells connected in series or parallel.

Electric circuit is correct because electric current can only travel through an unbroken, closed loop called a circuit.

By connecting electric components together is correct because a complete loop requires wires, power sources, and devices connected continuously.

To push charges through the circuit is correct because a battery provides the voltage (driving force) needed to make electrons flow.

To allow charges to flow is correct because the conducting metal of the wire provides a low-resistance path for the electrons to travel.

Bulb is correct because a light bulb converts electrical energy into visible light and thermal energy.

Switch is correct because opening or closing a switch manually breaks or completes the conductive loop of the circuit.

Positive to negative terminal is correct because historical convention assumes positive charges flow from the positive terminal to the negative terminal.

Negative to positive terminal is correct because negatively charged electrons are naturally repelled by the negative terminal and attracted to the positive terminal of a cell.

Wire is correct because conducting metal wires provide the physical low-resistance path for electrical current to flow.

Bulb is correct because a light bulb converts electrical energy into visible electromagnetic radiation.

Switch is correct because a switch completes or interrupts the physical conducting path in an electrical circuit.

Cell or Battery is correct because they contain electrochemical compounds that react to generate electrical voltage.

Motor is correct because an electric motor utilizes magnetic forces created by electricity to produce rotational physical motion.

Closed (complete) is correct because turning a switch ON completes the conductive loop, allowing current to flow continuously.

Complete (closed) is correct because a closed switch completes the physical connection, closing the gap in the circuit.

Open (incomplete) is correct because turning a switch OFF breaks the conductive path, stopping the flow of electricity.

Open (incomplete) is correct because an open switch creates a physical gap in the circuit path so electric current cannot flow.

Electrons can move through the complete circuit is correct because a closed circuit represents an unbroken, continuous path with no gaps.

Electrons cannot travel because the path is broken is correct because an open circuit contains a physical gap or disconnected wire that halts the electrical current.

All of the above is correct because constructing the working security circuit requires a buzzer, clothespin, battery, string, and conductive aluminium foil.

Aluminium foil is correct because it is a metal that allows electricity to flow through it when the clothespin ends snap together.

When clothespin ends connect and complete the circuit is correct because the conductive foil creates a closed loop, letting electricity power the buzzer.

Keeps the circuit open (incomplete) is correct because the non-conducting string acts as an insulator, blocking the metal foil ends from touching.

Circuit completes and buzzer sounds is correct because the insulating string block is removed, allowing the spring-loaded metal ends to touch and close the circuit.

Only one path is correct because all electrical components in a series circuit are connected end-to-end in a single loop.

No current flows and no device works is correct because breaking any point of a single-path loop stops the entire current from flowing.

They become dim is correct because the total electrical voltage is shared among more bulbs, reducing the energy each bulb receives.

It is simple and less expensive to make is correct because it uses minimal wiring and straightforward end-to-end connections.

A string of fairy lights is correct because if one small bulb is missing or burns out, the entire string goes dark due to the broken path.

Refrigerator and freezer is correct because their internal safety switches, thermostats, and compressors are wired in series to regulate cold temperatures.

None of the lights will go on is correct because removing or burning out a single bulb breaks the continuous electrical path, halting all current in the circuit.

Parallel circuit is correct because the electrical components are arranged in multiple branching pathways connected across the same voltage.

Current still flows through them is correct because each branch in a parallel circuit is independent, so a break in one loop does not affect the others.

Same amount of current is correct because of the identical branch configurations mentioned in the textbook.

They do not become dim is correct because each parallel branch maintains full direct access to the voltage source, keeping bulb brightness constant.

Parallel circuit is correct because it ensures that turning off one home appliance (like a fan) does not shut down other devices (like lights).

Parallel circuits is correct because computer processors and data pathways require simultaneous, independent operations.

Setup II (two batteries) is correct because adding another battery doubles the electrical voltage pushing current through the single bulb.

Setup III (two bulbs) is correct because sharing the electrical energy of one battery between two series bulbs reduces the voltage each bulb receives, making them very dim.

Copper wire is correct because copper has higher electrical conductivity and lower resistance than aluminium.

Thick wire is correct because a thicker wire has a larger cross-sectional area which offers less electrical resistance to the flowing current.

Static electricity is correct because static means stationary, where charges gather on a surface without flowing as a current.

Positive and negative is correct because these are the two fundamental, opposing states of electrical charge.

Repel each other is correct because matching electrostatic forces push identical charge fields away from one another.

Attract each other is correct because opposing positive and negative fields pull together electrostatically.

Current electricity is correct because current represents the active physical flow of charge carriers through a conducting path.

Form of energy is correct because electrical force can perform mechanical, thermal, and chemical work.

In electrical devices and appliances is correct because homes and offices rely on electrical currents to power tech and tools.

Cell is correct because electrochemical cells use internal chemical reactants to generate a voltage potential.

Positive and negative is correct because chemical batteries have a high potential positive pole and a low potential negative pole.

Electric wire is correct because metal wire (like copper) provides a low-resistance pathway for charges.

Bulb is correct because a bulb's filament or LED glows bright to emit light when electric current passes.

Electric motor is correct because motors use magnetic fields generated by electricity to spin and produce physical motion.

Circuit is open and current does not flow is correct because an open switch creates a physical gap that halts the current.

Series and Parallel combination is correct because these are the two fundamental arrangements of circuit components.

Only one path is correct because a series circuit is wired end-to-end in a single continuous loop.

More than one path is correct because parallel circuits branch out to provide multiple independent pathways for charges.

Chemical energy into electrical energy is correct because a cell generates electricity through internal chemical reactions.

A combination of cells joined (+) to (-) is correct because connecting the positive terminal of one cell to the negative of another combines their voltages.

A conductor is correct because conductors possess free electrons that can flow to transmit electric current.

Plastic is correct because it is an insulator that does not allow electric charges to flow.

Excess of electrons is correct because gaining electrons gives an object more negative charges than positive charges.

Dimmer is correct because sharing the single battery's voltage among more bulbs reduces the electrical energy each bulb receives.

Chemical energy is correct because a cell contains stored chemical potential energy before it is converted to electricity.

Electric switch is correct because a switch completes or interrupts the conductive path of the circuit.

Closed circuit is correct because electric current requires an unbroken, complete loop to flow and power the bulb.