NDA 2017 Paper 1 | Physics Question 105 | General Science

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NDA 2017 Paper 1

MCQ (Single Correct Answer)

+2.5

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Match List I with List II and select the correct answer using the codes given below the lists.

Image

A	B	C	D
4	2	1	3

A	B	C	D
4	1	2	3

A	B	C	D
3	1	2	4

A	B	C	D
3	2	1	4

NDA 2017 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

A circular coil of single turn has a resistance of 20$$\Omega$$. Which one of the following is the correct value for the resistance between the ends of any diameter of the coil?

5 $$\Omega$$

10 $$\Omega$$

20 $$\Omega$$

40 $$\Omega$$

NDA 2017 Paper 1

MCQ (Single Correct Answer)

+2.5

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In a solenoid, the current flowing through the wire is I and number of turns per unit length is n. This gives a magnetic field B inside the solenoid. If number of turns per unit length is increased to 2n, what will be the value of magnetic field in the solenoid?

$${B \over 2}$$

$${B \over 4}$$

NDA 2017 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements is correct about the magnification of an optical microscope?

Magnification increases with the increase in focal length of eyepiece.

Magnification increases with the increase in focal length of objective.

Magnification does not depend upon the focal length of eyepiece.

Magnification decreases with the increase in focal length of eyepiece.

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Questions Asked from Marks 2.5