FPSC Everyday Science MCQs

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

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

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

Spontaneous heat transfer occurs from higher to lower temperature.
It continues until thermal equilibrium is approached.

Oil forms a lubricating layer between moving surfaces.
This reduces friction, wear, and overheating.

Inertia causes an object to remain at rest or in uniform motion unless acted on.
Greater mass generally means greater inertia.

Their bodies tend to continue moving forward when the bus stops.
This is an example of inertia of motion.

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

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

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

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

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