Physics - 02- E- NTPC SSC-NCERT level

Dec 27, 2020 - 08:25
Apr 27, 2022 - 12:26
 0

1. For a person having hypermetropia, the near point is –

(1) greater than 25 cm
(2) greater than 50 cm
(3) less than 25 cm
(4) infinity

2. Amount of water vapour in the atmosphere is measured in terms of –

(1) Humidity
(2) Droplets
(3) Smog
(4) All of the above

3. Name the process of production of energy in the Sun –

(1) Nuclear fission
(2) Radioactivity
(3) Nuclear fusion
(4) Ionization

4. Q.34) The ozone hole that has been detected lies in the atmosphere above –

(1) Arctic Ocean
(2) Antarctica
(3) India
(4) Alaska

5. The device used to change the speed of an electric fan is –

(1) Amplifier
(2) Regulator
(3) Switch
(4) Rectifier

6. Which one of the following wave-lengths of light is most effective in photosynthesis?

(1) Blue
(2) Green
(3) Orange
(4) Yellow

7. Why is it difficult to breathe at higher altitudes?

(1) Due to low air pressure
(2) Due to low temperature
(3) Due to ozone
(4) Due to high humidity

8. The reason for a swimming pool to appear less deep than the actual depth is –

(1) Refraction
(2) Light scattering
(3) Reflection
(4) Interference

9. Alternating current is converted into direct current by a –

(1) Transformer
(2) Dynamo
(3) Oscillator
(4) Rectifier

10. Remote-sensing device has an inbuilt source of –

(1) X-ray
(2) g-ray
(3) Ultraviolet ray
(4) Infrared ray

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