Pakistan MCQs

Chemical reactions inside a battery create an electric potential.
The stored chemical energy is converted into electrical energy.

Newton's third law describes paired interaction forces.
Each force is matched by an equal force in the opposite direction.

Solar cells use the photovoltaic effect.
They convert light directly into electrical energy.

The rocket pushes exhaust gases downward.
The gases exert an equal and opposite force on the rocket.

A microphone detects sound vibrations.
It converts them into corresponding electrical signals.

Pressure is force distributed over an area.
The same force produces greater pressure on a smaller area.

A loudspeaker uses electrical signals to move a diaphragm.
The diaphragm produces sound waves in air.

A sharp edge concentrates force over a small area.
This creates greater pressure and makes cutting easier.

Heat flows from a hotter body to a cooler body.
It is energy in transit rather than a material substance.

Pressure is measured in pascals.
One pascal equals one newton per square metre.

Temperature indicates how energetic particle motion is on average.
It determines the direction of heat flow.

The Senate is the upper legislative chamber.
It gives the federating units representation at the federal level.