Physics Quiz : Set-1
1. The information of brilliant colors in a thin soap film is a consequence of the phenomena of
A) Polarization and interference
B) Diffraction and dispersion
C) Multiple refraction and dispersion
D) Multiple reflection and interference
2. The working of the quartz crystal in the watch is based on the
A) Piezo – electric Effect
B) Edison Effect
C) Photoelectric Effect
D) Johnson Effect
3. The core of an electromagnet is made of soft iron because soft iron has
A) small susceptibility and small retentivity
B) large susceptibility and small retentivity
C) large density and large retentivity
D) small density and large retentivity
4. When one enters a dark room after being in bright light one is not able to see anything clearly for a while because
A) the retina of the eye moves forward
B) the retina of the eye moves backward
C) the iris is unable to dilate the pupil immediately to be able to see things
D) the eye has no power of accommodation
5. Curie is the unit of
A) temperature
B) radio activity
C) heat
D) energy
6. Which of the following physical quantities do not have same dimensions
A) Force and Pressure
B) Work and Energy
C) Impulse and momentum
D) Weight and Force
7. One astronomical unit is the average distance between
A) Earth and the Sun
B) Earth and the Moon
C) Jupiter and the Sun
D) Pluto and the Sun
8. The distance of stars is measured in
A) Galactic unit
B) seller mile
C) Cosmic Kilometre
D) Light year
9. Decibel is the unit of
A) speed of light
B) intensity of sound
C) intensity of heat
D) None of these
10. Which of the following is not a vector quantity
A) speed
B) velocity
C) torque
D) displacement
11. When a steel ball is placed on the surface of mercury, it does not sink because
A) of the surface tension of mercury
B) mercury is a semisolid
C) of the high viscosity of mercury
D) the density of mercury is greater than that of steel
12. To produce deflection in a television picture tube:
A) an electric field is used
B) a magnetic field is used
C) both electric and magnetic field are used
D) none of the above
Show Answer & Explanation
13. Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then
A) the brighter bulb has smaller resistance
B) the brighter bulb has larger resistance
C) both the bulbs have the same resistance
D) none of these
14. A car parked in the sun with its windows closed gets terribly hot inside. This is due to
A) the heat emitted by the engine
B) the greenhouse effect
C) the good conducting power of the metal body
D) the double layered wind shield
15. If a band is played on the moon the sound will
A) reverberate
B) be heard by us faintly
C) be heard upto 10 km from it
D) not be heard at any distance at all from it