NTSE SAT Physics Papers 10

This is NTSE SAT Physics Papers 10 .. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

A block is placed on a rough horizontal surface. A time dependent horizontal force F = kt acts on the block, where k is positive constant. Acceleration

A
B
C
D
Correct

White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains

A
All colours
B
Yellow, orange, red
Correct
C
Violet, indigo, blue
D
All colour except green

A concave mirror is placed in a horizontal table with its axis directed vertically upwards. Let O be pole of the mirror and C its centre of curvature. A point object is placed at C. it has a real image, also located at C. If the mirror is now filled with water, the image will be

A
Real and will remain at C
B
Real and located at point between C and \(\infty \)(infinity)
C
Virtual and located at a point between C and O
D
Real and located at a point between C and O
Correct

Four pendulums P, Q, R and S are suspended from same elastic support as shown in figure. Out of these P and R are of the same length. Q is smaller than P and S is longest. If the pendulum bob P is displaced to give small vibration.

A
Amplitude of vibration for S is maximum
B
Amplitude of vibration for Q is maximum
C
Amplitude of vibration for R is maximum
Correct
D
Amplitude of vibration for all is same

The elongation of wire of length L is l, in the case of figure (i). The same wire elongation in case of figure (ii) will be (Pulley is light)

A
l/2
B
4 l
C
2 l
Correct
D
2 l

Suppose universal gravitational constant starts to decrease, then

A
Kinetic energy will remain constant
B
Length of the year will increase
Correct
C
All of the above
D
Earth will follow a spiral path of decreasing radius

If a lens of focal length ‘f’ is cut in two equal parts shown asare put in contact as shown in figure (i) and (ii)

A
f, f
B
f/2, 0
C
0, f/2
D
f/2, \(\infty \)(infinity)
Correct

A uniform wire when connected directly across a 220 V line produces heat H per second. If the wire is divided into n-parts and all parts are connected in parallel across a 220 V line, the heat produced per second will be

A
H/n
B
\({n^2}H\)
Correct
C
\(H/{n^2}\)
D
nH

In the question below, a statement of assertion (A) is followed by corresponding statement of reason (R). Of the following alternatives, choose the correct one. (A) to keep valuable instruments away from earth’s magnetic field, they are enclosed in iron boxes. (R) nbsp; nbsp; nbsp; nbsp; iron boxes repel the earth magnetic field lines.

A
If both assertion and reason are true and reason is the correct explanation of assertion
B
If both assertion and reason are true and reason is not the correct explanation of assertion
C
Assertion is true, reason is false
Correct
D
Assertion is false, reason is true

A sphere, a cube and a thin circular plate of same material and mass, are heated to a temperature of \(200^\circ C\)and allowed to cool-

A
Plate will cool at slowest rate
B
Cube will cool at moderate rate
Correct
C
Rate of cooling will be same in all three
D
Sphere will cool at fastest rate

A body of mass 20 kg. falls through a distance of 50 cm. Then the loss in potential energy is-

A
98 Joule
Correct
B
980 Joule
C
5000 Joule
D
392 Joule

Calorimeters are generally made of-

A
Brass
B
Copper
Correct
C
Zinc
D
Aluminium

1 Calorie is able to raise the temp. of 1 gm. of copper through approximately-

A
\(1^\circ C\)
B
\(10^\circ C\)
Correct
C
\(5^\circ C\)
D
\(20^\circ C\)

A particle in a medium completes 20 vibrations in 2.5 seconds. The frequency of wave is-

A
50 Hz
B
20 Hz
C
200 Hz
D
8 Hz
Correct

The value of 1 Kilowatt power in terms of horse power will be-

A
4.36 H.P
B
1.3 H.P
Correct
C
786 H.P
D
746 H.P