Q1.Radioactivity was discovered by
(a) Rutherford
(b) Henry Becquerel
(c) Bohr
(d) Madame Curie
Q2. Photoelectric effect was discovered by
(a) Hertz
(b) Einstein
(c) Plank
(d) Bohr
Q3. A nanometre is equal to
(a) 10–4 cm
(b) 10–7 cm
(c) 10–8 cm
(d) 10–9 cm
Q4. Pyrometer is used to measure
(a) air pressure
(b) humidity
(c) high temperature
(d) intensity of earthquake
Q5. The apparatus used to measure the intensity of light is known as
(a) Anemometer
(b) Calorimeter
(c) Lux meter
(d) Altimeter
Q6. A man is standing on a boat in still water. If he walks towards the shore, the boat will
(a) move towards the shore
(b) move away from the shore
(c) remain stationary
(d) sink
Q7. Richter scale is used for measuring
(a) velocity of sound
(b) intensity of light
(c) amplitude of seismic waves
(d) intensity of sound
Q8. Electron beam therapy is a kind of radiation
therapy to treat
(a) enlarged prostate gland
(b) gall bladder stones
(c) certain types of cancer
(d) kidney stones
Q9. A dynamo which is said to generate electricity actually acts as a
(a) Source of ions
(b) Source of electric charge
(c) Converter of energy
(d) Source of electrons
Q10. Which of the following is not an electromagnetic wave ?
(a) γ-rays
(b) cosmic rays
(c) Microwave
(d) None of these
Q11. Astronauts in space can’t stand at one place, because
(a) there is no gravity
(b) viscous forces of the atmosphere are very strong
(c) solar wind exert an upward force
(d) atmospheric pressure is very low
Q12. To hear a clear echo, the minimum distance should be
(a) 165 feet
(b) 165 meter
(c) 16.5 feet
(d) 16.5 meter
Solutions
1.B
2.A
3.B
4.C
5.C
6.B
7.C
8.C
9.C
10.B
11.A
12.D