Objective Part

Subject: Physics Class: X Total Marks: 12

Name:_______________________ Date:________________

1. Choose the correct option. (12)

1. The relation between v, f and l of a wave is:
(a) vf =λ (b) v =λf (c) f =λv (d) v =λ/f

2. Which of the following characteristics of a wave is independent of the others?
(a) speed (b) frequency (c) amplitude (d) wavelength

3. Waves transfer:
(a) energy (b) frequency (c) wavelength (d) velocity

4. Which is an example of a longitudinal wave?

(a) Sound wave (b) Light wave (c) Radio wave (d) Water wave

5. Which form of energy is sound?

(a) Electrical (b) Mechanical (c) Thermal (d) Chemical

6. For a normal person audible frequency range for sound wave lies B/W :
(a)10Hz and 10kHz (b)20Hz and 20kH (c) 25H and 25kHz (d) 30Hz and 30kHz

(a) its direction (b) its speed (c) its frequency (d) its wavelength

A converging mirror with a radius of 20cm creates a real image 30 cm from the mirror. What is the object distance?
(a) 5.0 cm (b) 7.5 cm (c) 15 cm (d) 20 cm
The index of refraction depends on:
(a) the focal length (b) the speed of light (c) the image distance (d) the object distance

10. A positive electric charge:
(a) Attracts another positive charge (b) Repels another positive charge (c) Attracts a neutral charge

(d) Repels a neutral charge

11. Capacitance is defined as:

(a) VC (b)Q/V (c) QV (d) V/Q

12. In SI the unit of charge is:

(a) Joule (b) Volt (c) Coulomb (d) Watt

Causative