NTSE SAT Physics Papers 05

NTSE SAT Physics Papers 05

This is NTSE SAT Physics Papers 05 .. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
A certain household has consumed 200 units of energy during a month. Its value in joules will be
  • A
    \(7.2 \times {10^{10}}\)
  • B
    \(3.6 \times {10^{10}}\)
  • C
    \(3.6 \times {10^8}\)
  • D
    \(7.2 \times {10^8}\)
    Correct
2
A body covers half the distance with a speed of 20 m/s and the other half with 30 m/s. the average speed of the body during the whole journey is
  • A
    25 m/s
  • B
    24 m/s
    Correct
  • C
    Zero
  • D
    None of these
3
If a wire of resistance \(1\Omega \)is stretched to double its length, then resistance will be
  • A
    \(\frac{1}{2}\Omega \)
  • B
    \(4\Omega \)
    Correct
  • C
    \(2\Omega \)
  • D
    \(\frac{1}{4}\Omega \)
4
If a part of a convex lens is covered, its focal length will
  • A
    Become half
  • B
    Remain unchanged
    Correct
  • C
    Depend on the covered area
  • D
    Become twice
5
Note the relationship between the first two words and suggest the suitable word for the fourth place. Loudness : Amplitude :: Quality : ________
  • A
    Intensity
  • B
    Frequency
  • C
    Wave form
    Correct
  • D
    Wave length
6
How many times does the polarity of an A.C. supply of frequency 50 Hz change in one second?
  • A
    100
    Correct
  • B
    50
  • C
    25
  • D
    200
7
In electromagnetic wave, the direction of electric and magnetic field are
  • A
    Perpendicular to each other
    Correct
  • B
    At acute angle to each other
  • C
    At obtuse angel to each other
  • D
    Parallel to each other
8
\(V{m^{ - 1}}\)is the unit of
  • A
    Potential
  • B
    Electric potential energy
  • C
    Electric field intensity
    Correct
  • D
    Electric current
9
The minimum distance between an object and its real image in a convex lens is
  • A
    4 times its focal length
    Correct
  • B
    2 times its focal length
  • C
    2.5 times its focal length
  • D
    Equal to its focal length
10
The ratio of velocity of sound in hydrogen to the velocity of sound in oxygen is
  • A
    It is 2:1
  • B
    It is 8:1
  • C
    It is 4:1
    Correct
  • D
    It is 16:1
11
Which of the following is electromagnetic in nature?
  • A
    \(\gamma - ray\)
    Correct
  • B
    \(\beta - ray\)
  • C
    Cathode ray
  • D
    \(\alpha - ray\)
12
What will be the power consumed by a \(25\Omega \)wire if it is put across a mains of 250 volts?
  • A
    25 kw
  • B
    25 w
  • C
    2.5 kw
    Correct
  • D
    2.5 w
13
Two bodies with kinetic energies in the ratio 2:3 are moving with equal momentum. The ratio of their masses
  • A
    It is 1:2
  • B
    It is 3:2
    Correct
  • C
    It is 2:3
  • D
    It is 1:3
14
The figure given below shows the displacement plotted against time for a particle. In which region is the force acting on the particle zero?
Question 14 figure 1
  • A
    AB
    Correct
  • B
    CD
  • C
    DE
  • D
    BC
15
A person standing on the floor of a lift drops a coin. The coin reaches the floor of the lift in a time \({t_1}\)if the lift is stationary and in time \({t_2}\)if its moving uniformly. Then
  • A
    \({t_1} < {t_2}\,\,or\,\,{t_1} > {t_2}\)depending on whether the lift is going upward or down.
    Correct
  • B
    \({t_1} > {t_2}\)
  • C
    \({t_1} = {t_2}\)
  • D
    \({t_1} < {t_2}\)