697209-2026-2028-syllabus

What is the principle of moments?

It states that when there is no resultant force and no resultant moment, an object is in equilibrium.

What is the definition of density?

Density is mass per unit volume, expressed as ρ = m/V.

How is acceleration defined in physics?

Acceleration is the change in velocity per unit time, expressed as a = ∆v/∆t.

What is the approximate value for acceleration due to gravity near the Earth's surface?

Approximately 9.8 m/s².

What does the optical term 'focal length' refer to?

The distance from the lens to the point where parallel rays of light converge.

What characterizes a transverse wave?

The direction of vibration is at right angles to the direction of propagation.

What is the significance of the Hubble constant?

It relates the speed at which a galaxy is moving away from the Earth to its distance from the Earth.

What type of materials can act as electrical insulators?

Materials that do not allow electrical current to pass through them easily.

What happens during nuclear fission?

The splitting of a heavy nucleus into two lighter nuclei, releasing energy.

What does the electromagnetic spectrum describe?

It describes the range of all types of electromagnetic radiation.

What are the units for electric charge?

Coulombs (C).

What is required for sound waves to travel?

A medium (solid, liquid, or gas).

What is the formula for calculating the resistance in an electric circuit?

Resistance (R) is calculated using R = V/I, where V is voltage and I is current.

What does 'thermal equilibrium' mean?

It is the state where two bodies in contact no longer exchange heat.

Which force acts on objects moving through a liquid?

Drag or viscous force.

How can you define electrical power?

The rate of doing work or the rate at which electrical energy is transferred, measured in watts (W).