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

Which one of the following scientists mentioned that an electron in an atom could revolve in certain stable orbits without the emission of radiant energy?

A

Ernest Rutherford

B

J.J. Thomson

C

Niels Bohr

D

Albert Einstein

2
NDA General Ability 21 April 2024
MCQ (Single Correct Answer)
+4
-1.33

LIGO experiment confirmed one of the predictions of :

A

String theory

B

Special theory of relativity

C

Quantum mechanics

D

General theory of relativity

3
NDA General Ability 21 April 2024
MCQ (Single Correct Answer)
+4
-1.33

A block of mass 2 kg, moving with the initial speed of 3 m/s comes to rest on a rough horizontal surface after travelling a distance of 3 m. The magnitude of the frictional force is :

A

9 N

B

3 N

C

18 N

D

1 N

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

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

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