Physics · NDA previous year questions

679 questions asked across 18 exam years, newest first

Year-wise papers Topic-wise questions

Practise this topic

2019 38 questions

Q552019 · 21 Apr 2019
Let us consider a copper wire having radius r and length l. Let its resistance be R. If the radius of another copper wire is 2r and the length is l/2 then the resistance of this wire will be
1. A.R
2. B.2R
3. C.R/4
4. D.R/8
Show answer
Answer: D
Q562019 · 21 Apr 2019
Who among the following has explained the phenomenon of photo-electric effect ?
1. A.Max Planck
2. B.Albert Einstein
3. C.Neils Bohr
4. D.Ernest Rutherford
Show answer
Answer: B
Q582019 · 21 Apr 2019
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 ?
1. A.1, 2 and 3
2. B.1 and 3 only
3. C.2 and 3 only
4. D.1 and 2 only
Show answer
Answer: D
Q602019 · 21 Apr 2019
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 eye-piece is
1. A.12·5 cm
2. B.5 cm
3. C.2 cm
4. D.10 cm
Show answer
Answer: C
Q612019 · 21 Apr 2019
Which one of the following forces is non-central and non-conservative ?
1. A.Frictional force
2. B.Electric force
3. C.Gravitational force
4. D.Mechanical force
Show answer
Answer: A
Q622019 · 21 Apr 2019
Suppose there are two planets, 1 and 2, having the same density but their radii are $R_{1}$ and $R_{2}$ respectively, where $R_{1} > R_{2}$ . The accelerations due to gravity on the surface of these planets are related as
1. A. $g_{1} > g_{2}$
2. B. $g_{1} < g_{2}$
3. C. $g_{1} = g_{2}$
4. D.Can't say anything
Show answer
Answer: A
Q632019 · 21 Apr 2019
1. A. $V_{A} < V_{B} < V_{C}$
2. B. $V_{A} > V_{B} > V_{C}$
3. C. $V_{A} = V_{B} = V_{C} \neq = 0$
4. D. $V_{A} = V_{B} = V_{C} = 0$
Show answer
Answer: B
Q642019 · 21 Apr 2019
1 dyne (a unit of force in CGS system) equals to
1. A. $1 0^{3} g cm/ s^{2}$
2. B. $1 0^{- 3} g cm/ s^{2}$
3. C. $1 0^{5} kg m/ s^{2}$
4. D. $1 0^{- 5} kg m/ s^{2}$
Show answer
Answer: D
Q652019 · 21 Apr 2019
1. A. $C D$ and $B C$
2. B. $B C$ and $A B$
3. C. $C D$ and $A B$
4. D. $A B$ and $C D$
Show answer
Answer: C
Q662019 · 21 Apr 2019
Which one of the following statements regarding a thermos flask is NOT correct?
1. A.The walls of flask are separated by vacuum and made of glass which is a poor conductor of heat
2. B.The glass walls themselves have shiny surfaces
3. C.The surface of inner wall radiates good amount of heat and the surface of outer wall absorbs some of the heat that is radiated from the inner wall
4. D.The cork supports are poor conductors of heat
Show answer
Answer: C
Q672019 · 21 Apr 2019
'Black hole' is a
1. A.huge black star which has zero acceleration due to gravity on its surface
2. B.star which has moderate acceleration due to gravity on its surface
3. C.star which has collapsed into itself and has large acceleration due to gravity on its surface
4. D.star which has collapsed into itself and has zero acceleration due to gravity on its surface
Show answer
Answer: C
Q692019 · 21 Apr 2019
When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is
1. A.Blue
2. B.Red
3. C.Green
4. D.Violet
Show answer
Answer: B
Q732019 · 21 Apr 2019
Which one of the following minerals is used as a fuel in nuclear power stations?
1. A.Bauxite
2. B.Quartz
3. C.Feldspar
4. D.Pitchblende
Show answer
Answer: D