NTSE SAT Physics Papers 02

NTSE SAT Physics Papers 02

This is NTSE SAT Physics Papers 02 .. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Correct relation is
  • A
    \({v^2} = {u^2} + 2{a^2}s\)
  • B
    \({v^2} = {u^2} - 2{a^2}{s^2}\)
  • C
    \({v^2} = {u^2} + 2{a^2}{s^2}\)
  • D
    \({v^2} = {u^2} + 2as\)
    Correct
2
If the velocity of a wave is 400 m/sec and frequency is 100 Hz, then the wavelength of the wave is
  • A
    6 m
  • B
    4 m
    Correct
  • C
    3 m
  • D
    2.8 m
3
According to Newton’s Second law of Motion –
  • A
    \(f = m \times a\)
    Correct
  • B
    \(f = \frac{m}{a}\)
  • C
    \(f = \frac{m}{v}\)
  • D
    \(f = m \times v\)
4
Relation between mass of body and its weight is .....................
  • A
    g = m
  • B
    \(w = \frac{m}{g}\)
  • C
    w = m + g
  • D
    w = mg
    Correct
5
When we rub our hands, which of the following is true?
  • A
    Heat energy converted to kinetic energy
  • B
    Mechanical energy converted to heat energy
    Correct
  • C
    Kinetic energy converted to heat energy
  • D
    Heat energy converted to mechanical energy
6
Correct relation is
  • A
    1 horse power = 373 w
  • B
    1 horse power = 746 w
    Correct
  • C
    2 horse power = 746 w
  • D
    1 horse power = 740 w
7
The kinetic energy of an object is K. If its velocity is doubled, then its kinetic energy will be
  • A
    \(\frac{K}{4}\)
  • B
    2 K
  • C
    4 K
    Correct
  • D
    K
8
Frequency of Ultrasonic waves is
  • A
    1000 Hz
  • B
    Less than 20 Hz.
  • C
    Greater than 20,000 Hz.
    Correct
  • D
    Less than 20,000 Hz.
9
Which is the important constituent (95 percent) of natural gas?
  • A
    Propane
  • B
    Ethane
  • C
    Chlorine
  • D
    Methane
    Correct
10
A ball is dropped from the top of a tower of height 100 m. simultaneously, another ball was thrown upward from the bottom of the tower with a speed of 50 m/s. \(\left( {g = 10\,m/{s^2}} \right)\). These two balls would cross each other after a time:
  • A
    1 second
  • B
    3 seconds
  • C
    4 seconds
  • D
    2 seconds
    Correct
11
A body of mass 10 kg slides down an inclined plane from rest. Its height from the ground level is 10 m. The inclined plane is not smooth. When the body reaches the ground its speed is 14 m/s. Then how much work is done against friction? \(\left( {g = 10\,m/{s^2}} \right)\)
  • A
    1000 J
  • B
    20 J
    Correct
  • C
    100 J
  • D
    980 J
12
A hollow spherical object weighs 25 gm in air. Its material density is 5 gm/c.c. If it weighs 15 gm in water, find the volume of the hollow space in it.
  • A
    5 c.c
    Correct
  • B
    15 c.c
  • C
    10 c.c
  • D
    20 c.c
13
Four resistance each of Value \(R\Omega \)are connected as shown in the figure below.What would be the net resistance between A and B?
Question 13 figure 1
  • A
    3R/2
  • B
    R/2
  • C
    R/4
    Correct
  • D
    4 R/3
14
Six resistance are to be connected to a battery. After connecting a particular set of five resistances with values \({R_1},\,{R_2},\,{R_3},\,{R_4}\,and\,{R_5}\)as shown in the figure, the sixth one \({R_6}\)was to be connected between A and B. it was observed that the current in the circuit is independent of the value of \({R_6}\). Them what should have been the relations between these resistances.
Question 14 figure 1
  • A
    \(\frac{1}{{{R_5}}} + \frac{1}{{{R_6}}} = \frac{1}{{\,{R_1} + \,{R_2}}} + \frac{1}{{\,{R_3} + \,{R_4}}}\)
  • B
    \({R_1}{R_4} = \,{R_2}\,{R_3}\)
    Correct
  • C
    \({R_1}{R_3} = \,{R_2}\,{R_4} = {R_5}\,{R_6}\)
  • D
    \({R_1}\,{R_2}\,{R_3} = \,{R_4}\,{R_5}\,{R_6}\)
15
Resistance of a platinum wire is \(2\Omega \)at \(0^\circ C\)and \(2.5\Omega \)at \(100^\circ C\). Then at what temperature its resistance would be \(2.3\Omega \)?
  • A
    \(45^\circ C\)
  • B
    \(50^\circ C\)
  • C
    \(60^\circ C\)
    Correct
  • D
    \(30^\circ C\)