1
NDA General Ability 21 April 2024
MCQ (Single Correct Answer)
+4
-1.33
Change Language

Which one of the following is primarily responsible for conduction of current in a metal?

A

Bound electrons

B

Free electrons

C

Both bound and free electrons

D

Ions

2
NDA General Ability 3 September 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The streaming of light beams coming from the Sun through trees is said to have suggested that light travels in straight line. The particles on the path of light beams are visible to us because
A
dust particles in the air reflect light into our eyes
B
dust particles in the air scatter light into our eyes
C
dust particles in the air refract light into our eyes
D
dust particles in the air polarize light into our eyes
3
NDA General Ability 3 September 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The flash of lightning is seen before the thunderstorm is heard. It verifies that
A
sound travels much faster than light
B
light travels much faster than sound
C
light and sound both travel with same speed
D
intensity of flash of lightning is very high during thunderstorm
4
NDA General Ability 3 September 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The potential difference between the two end terminals of an electric heater is 220 V and the current through it is 0.5 A. What would be the current through the heater if the potential difference across the terminals of the heater is reduced to 120 V?
A
1.0 A
B
0.5 A
C
0.27 A
D
0.7 A
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