CDS GENERAL SCIENCE QUIZ- 17

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Question 1:

Gauss’s Law is used to find the electric field by considering a Gaussian surface around the point where we calculate the field, the Gauss law for electric field is valid for-

Question 2:

Two persons are holding a rope of negligible mass horizontally. A 20 kg mass is attached to the rope at the midpoint; as a result, the rope deviates from the horizontal direction. The tension required to completely straighten the rope is (g=10 m/s^2)

Question 3:

The base of an electric iron is brightly polished mainly -

Question 4:

If the length of a simple pendulum is halved then its period of oscillation is -

Question 5:

Eclipses occur due to which optical phenomena?

Question 6:

In which type of error occurs in only one direction, either positive or negative?

Question 7:

A body is freely rolling down on an inclined plane it has?

Question 8:

If g be the gravitational acceleration on the surface of the earth, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is twice as that of earth is

Question 9:

A bullet of mass 10 g is fired with a velocity of 50m/s from a gun of mass 2kg. Find the recoil velocity (in m/s) of the gun.

Question 10:

The kepler’s law tells us that a planet is moving around the sun with mean distance r and time period T, then