Physics - 02- C- NTPC SSC-NCERT level

Dec 26, 2020 - 23:50
Apr 27, 2022 - 12:32
 0

1. Electricians use rubber gloves while working because -

(1) rubber is an insulator
(2) rubber is a good conductor
(3) wearing rubber gloves is mandatory
(4) rubber makes work easy

2. When a person sitting on a swing stands up on the swing, the frequency of oscillation –

(1) decreases
(2) increases
(3) becomes infinite
(4) does not change

3. Night photography and photopraphy in mist and fog are possible using –

(1) ultra-violet radiation
(2) infra-red radiation
(3) microwave radiation
(4) gamma radiation

4. An Athlets runs before long jump to get advantage on –

(1) Inertia of motion
(2) Frictional force
(3) Moment of a force
(4) Principle of moments

5. In sunlight, a rose appears red. In green light, the same rose appears –

(1) red
(2) black
(3) green
(4) yellow

6. The sparkling of a diamond is due to –

(1) total internal reflection of light
(2) interference of light
(3) polarisation of light
(4) refraction of light

7. Ocean currents are an example of –

(1) convection
(2) conduction
(3) insulation
(4) radiation

8. Which of the following is a good conductor of heat but a bad conductor of electricity?

(1) Celluloid
(2) Rubber
(3) Asbestos
(4) Mica

9. A piece of wood is held under water. The up thrust on it will be:

(1) equal to the weight of the Wood
(2) less than weight of the wood
(3) more than the weight of the wood
(4) Zero

10. In MRI machine, which one of the following is used?

(1) Sound wave
(2) X-ray
(3) Ultra-sound wave
(4) Magnetic wave

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