1
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following statements about a solenoid.

1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid.

2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid.

3. The magnetic field strength in a solenoid depends upon the diameter of the solenoid.

Which of the statements given above are correct?
A
1, 2 and 3
B
1 and 3
C
2 and 3
D
1 and 2
2
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Light year is a unit of measurement of
A
very large distances
B
time interval in years
C
amount of light received on earth in a year
D
mass of atoms
3
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The focal length of the objective lens of a telescope is 50 cm. If the magnification of the telescope is 25, then the focal length of the eyepiece is
A
12.5 cm
B
5 cm
C
2 cm
D
10 cm
4
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following force is non-central and non-conservative?
A
Frictional force
B
Electric force
C
Gravitational force
D
Mechanical force
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