ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

00:00
Question # 1

The cause of mirage observed in deserts in bright sunlight is due to

Question # 2

Light waves are:

Question # 3

Light appears to travel in straight line because

Question # 4

Speed of light in vacuum depends upon:

Question # 5

Electromagnetic waves transport:

Question # 6

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 7

Least distance of distinct vision of an old man possibly becomes:

Question # 8

To see the minor details of the object by microscope, it should have:

Question # 9

The distance from eye to near point is taken as:

Question # 10

The size of the image is maximum when its distance from the magnifying glass is:

Question # 11

To sources are said to be coherent if they have:

Question # 12

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 13

The magnifier forms a virtual image of the object at:

Question # 14

A magnifier gives an image which is:

Question # 15

Resolving power in mth order diffraction for grating is given by:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
2 The magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
3 The ratio of the size of the image to that of object is called:
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis
4 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
5 Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
6 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
7 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
8 If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
9 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
10 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller

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