Important Questions of Physics General Awareness | Zigya

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11.

We are able to walk on earth without slipping because of

  • Gravitational force

  • Frictional force

  • Viscous force

  • Viscous force

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12.

What is the phenomenon which established the transverse nature of light?

  • Reflection

  • Interference

  • Diffraction

  • Diffraction

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13.

What is the name of the device used to convert alternating current into direct current?

  • Ammeter

  • Galvanometer

  • Rectifier

  • Rectifier

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14.

Stars twinkle but planets do not twinkle because

  • they emit light of a constant intensity

  • their distance from the earth does not change with time

  • they are very far away from the earth resulting in decrease in intensity of light

  • they are very far away from the earth resulting in decrease in intensity of light

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15.

Which of the following is not true about X-rays?

  • have low penetrating power

  • travel with the speed of light

  • can be reflected or refracted

  • can be reflected or refracted

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16.

The washing machine works on the principle of ____________.

  • Dialysis

  • Diffusion

  • Reverse osmosis

  • Reverse osmosis

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17.

A body moving in a circular path with a constant speed has a ........

  • constant velocity

  • variable acceleration

  • constant kinetic energy

  • constant kinetic energy

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18.

During the motion of a projectile fired from the earth surface....

  • its kinetic energy remains constant

  • its momentum remains constant

  • vertical component of its velocity remains constant

  • vertical component of its velocity remains constant

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19.

Which of the following waves cannot be polarised?

  • Radio

  • Ultra violet

  • Infrared

  • Infrared

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20.

Two vectors are said to be equal if

  • Only their magnitudes are same

  • Only their directions are same

  • Both magnitude and direction are same

  • Both magnitude and direction are same

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