Pakistan MCQs

An electric motor uses magnetic forces on current-carrying conductors.
It converts electrical energy into motion.

A generator uses electromagnetic induction.
Mechanical motion produces electrical energy.

Lightning tends to strike exposed high points and conductors.
Safer shelter is inside a substantial building or closed vehicle.

An element contains atoms with the same number of protons.
It cannot be broken into simpler substances by ordinary chemical means.

A compound contains different elements chemically bonded together.
Its properties differ from those of its constituent elements.

Mixture components retain many of their own properties.
They can often be separated by physical methods.

Bats emit high-frequency sound pulses and detect returning echoes.
This helps them navigate and locate prey.

Electric current measures charge passing a point per unit time.
Its SI unit is the ampere.

Electric current is measured in amperes.
An ampere equals one coulomb of charge per second.

Voltage represents energy transferred per unit charge.
It drives current through a circuit.

Resistance is measured in ohms.
It describes opposition to electric current.

Copper contains mobile electrons that carry current easily.
It is widely used in electrical wiring.