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SSC Scientific Assistant: Physics Quiz 7

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Question 1

Focal length of a convex lens is maximum for

Question 2

How many images will be formed if two mirrors are fitted on adjacent walls and one mirror of celling.

Question 3

Diameter of a plano-convex lens is 6 cm and thickness at the center is 3 mm. If the speed of light in the material of the lens is 2 x 10⁸ meter per second, the focal length of the lens is

Question 4

The image of an object formed by a device is always virtual and small. The device may be

Question 5

The magnifying power of a simple microscope can be increased if we use eye piece of

Question 6

In a simple form of astronomical telescope the focal length of the objective is 30 cm and that of the eye piece is 2 cm. The magnifying power, when the final image of a distant object is seen at a distance of 12 cm, is

Question 7

In a double slit experiment, the distance between the two slits 1 mm and the screen is placed 1 m way. What should be the width of each slit to obtain 20 maximum of the double-slit pattern within the central maximum of the single slit pattern.

Question 8

A beam of natural light falls on a system of 6 polaroids which are arranged in succession such that each Polaroid is turned through 30⁰ with respect to the preceding one. What portion of the incident energy passes through the system?

Question 9

In the young’s double slit experiment the interference pattern is found to have intensity ratio between bright and the dark fringes as 9. This implies that

Question 10

The shortest wavelength of X-ray emitted from a X-ray tube depends on the

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ESE & GATE EC General

Jun 8ESE & GATE EC