NTSE SAT Physics Papers 08

This is NTSE SAT Physics Papers 08 .. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

The current and voltage between AB and BC in the given electrical network

A
at AB : l<2mA, V=4 V and at BC:1>2 mA, V=2V
B
at AB :l=2mA, V=2 V and at BC : 1= 2 mA, V=2V
Correct
C
at AB :l=2mA, V=4 V and at BC:1=2mA, V=2V
D
at AB :l<2mA, V=4 V and at BC: 1 <2mA, V=4 V

Which of the following group of the ray diagram correct?

A
b, c and e
B
a, b and e
C
a, e and f
Correct
D
d, c and f

An electron enters a magnetic field at right angles to it, as shown in the figure, the direction of force actin on the electron is

A
out of the page
Correct
B
into the age
C
towards left
D
towards right

Who among the following is honored by awarding “Bharat Ratna ‘?

A
C.N.R. Rao
Correct
B
Narayana Murthy
C
T. N. Guru Rao
D
Ajim Premji

A Hydrogen gas filled balloon when released from the surface of moon would:

A
rise up with an acceleration of \(\left( {9.8 \times 6} \right)m/{s^2}\)
B
neither climb nor fall
Correct
C
fall with an acceleration of \(\left( {9.8/6} \right)m/{s^2}\)
D
rise up with an acceleration of 9.8 m/ \({s^2}\)

In which of the following situations, you will not experience weightlessness?

A
You are falling freely under gravity of the Earth
B
In a lift moving downwards with uniform velocity
Correct
C
Inside a space craft which is in an orbit around the Earth
D
you are at the centre of the Earth

An object is moving with a speed of 1.0 m/s. A force \({F_1}\) is required to stop it over a distance X. If the speed of the object increases to 3.0 m/s a force \({F_2}\) is required to stop it over the same distance X. \({F_1}:{F_2}\) will be:

A
It is 1:3
B
It is 1:6
C
It is 3:1
D
It is 1:9
Correct

A bullet when fired at a target with a speed of 100 m/s, penetrates 1 m into it. If the target is 0.25 m thick, then it will emerge with a velocity (in m/s) of:

A
\(100 \times \frac{2}{5}\)
B
\(100 \times \frac{2}{3}\)
C
\(100 \times \frac{1}{2}\)
D
\(100 \times \frac{3}{2}\)
Correct

On a stationary sail boat, air is blown at the sails from a fan attached to the boat. The boat will:

A
move forward
B
move backward
C
remain stationary
Correct
D
spin around

A bob of mass 0.1 kg, hung from the ceiling of a room by a string 2 m long is set into oscillation. The speed of the bob at its mean position is 1 m/s. what is the trajectory of the motion of the bob if the string is cut when the bob is at one of its extreme positions?

A
moves back towards the mean position
B
follows a parabolic path
C
moves along the circular path with radius equal to length of the string
D
falls vertically downwards
Correct

The velocity – time (v-t) graph of a body is shown in the figure. for the intervals AD and DC, the ratio of the distance covered is:

A
\(\sqrt 3 :1\)
B
\(\sqrt 3 :2\)
C
It is 3:1
Correct
D
It is 1:3

Which of the following distance – time (x -t) graphs, labelled as A, B, C and D are not possible?

A
B and D
B
A and B
C
A and D
D
B and C
Correct

A current carrying straight conductor is placed in the east-west direction and the current is flowing in it from west to east direction in the plane of the paper. What will be the direction of the force experienced by this conductor due to the earth's magnetic field?

A
Along South in the plane of the paper
B
Perpendicularly outwards to the plane of the paper
C
Along North in the plane of the paper
D
Perpendicularly inwards to the plane of the paper
Correct

Water in an electric kettle connected to 220 V supply took 5 minutes to reach its boiling point. How long would it have taken if the supply had been of 200 V?

A
6.05 minutes
Correct
B
5.0 minutes
C
5.05 minutes
D
6.0 minutes

In the figure shown below, A and B represent two straight wires carrying equal currents in a direction at right angles to the plane of paper inwards. What will be the magnetic field strength at K, mid-point of line joining A and B? (assuming there is no effect of the magnetic field of the Earth)

A
Equal to twice the magnetic field strength produced by current in anyone of the conductors A or B
B
Equal to magnetic field strength produced by current in anyone of the conductors A or B
C
Zero
Correct
D
Can't be determined