Q1. Assertion: An object moving in a circle experiences centripetal acceleration.
Reason: Velocity direction changes continuously.

Q2. Assertion: Sound intensity decreases with distance from source.
Reason: Sound energy spreads over larger area.

Q3. Assertion: Mass of an object remains constant on moon.
Reason: Weight changes but mass is intrinsic property.

Q4. Assertion: Parallel plate capacitor stores energy in electric field.
Reason: Energy density u = ½ ε E².

Q5. Assertion: Refractive index of glass > water.
Reason: Light bends more in glass than water.

Q6. Assertion: In a series circuit, current is same in all components.
Reason: Series connection has single path.

Q7. Assertion: Nuclear energy arises due to mass defect.
Reason: ΔE = Δm c².

Q8. Assertion: Power of a lens depends on focal length.
Reason: P = 100/f (in cm).

Q9. Assertion: Ohm’s law is valid only for metallic conductors.
Reason: Some materials have non-linear V-I characteristics.

Q10. Assertion: Terminal velocity is constant for falling object.
Reason: Drag balances weight at terminal velocity.