1. When we hear a sound, we can identify its source form –
(a) wave length of sound
(b) the overtones present in the sound
(c) the intensity of sound
(d) the amplitude of sound
2. Which of the following is not the unit of energy?
(a) Calorie
(b) Joule
(c) Electron Volt
(d) Watt
3. Beats occur because of –
(a) interference
(b) reflection
(c) refraction
(d) Doppler effect
4. The types of waves produced in a sonometer wire are –
(a) transverse progressive
(b) transverse stationary
(c) longitudinal progressive
(d) longitudinal stationary
5. Melting point of ice –
(a) increase with increase of pressure
(b) decrease with increase of pressure
(c) is independent of pressure
(d) None of these
6.The correct value of 0° C on the Kelvin scale is –
(a) 273 K
(b) 27.315 K
(c) 275.15 K
(d) 270K
7.A temperature at which both the Fahrenheit and the centigrade scales have the
same value is –
(a) – 60°
(b) – 40°
(c) – 20°
(d) – 0°
8. Convex mirrors are used as a rear view mirror in motor cycles because –
(a) it forms real image
(b) it forms erect (upright) image
(c) it forms smaller image as compared with object
(d) All of the above
9. Which planets do not have satellites revolving around them?
(a) Mars and Venus
(b) Mercury and Venus
(c) Mars and Mercury
(d) Neptune and Pluto
10. Outside of cooking utensils are generally left black from below because –
(a) it is difficult to clean daily.
(b) black surface is a good conductor of heat.
(c) black surface is a poor conductor of heat.
(d) black surface is a good absorber of heat.
