NTSE SAT Physics Papers 14

This is NTSE SAT Physics Papers 14.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

The variation in the kinetic energy (K.E.) and the potential energy (P.E.) of a particle moving along the x-axis are shown in the graph below. Which one of the following graphs violates the law of conservation of energy?

A
B
C
D
Correct

The disc of a siren containing 60 holes rotates at a constant speed of 360 rotations per minute. The emitted sound is in unison with a tuning fork of frequency:

A
540 Hz
B
480 Hz
C
360 Hz
Correct
D
270 Hz

A tuning fork is excited by striking it with a padded hammer. What would be the nature of the vibrations executed by the prongs as well as the stem of the form respectively? (The reference direction is that of the propagation of the sound wave.)

A
The prongs vibrate longitudinally whereas the stem vibrates transversely
Correct
B
The prong vibrate transversely whereas the stem vibrates longitudinally
C
Both vibrate transversely
D
Both vibrate longitudinally

Find the reading of the ammeter in the circuit given below:

A
\(\frac{{11V}}{R}\)
B
\(\frac{V}{{2R}}\)
C
\(\frac{{3V}}{{4R}}\)
Correct
D
\(\frac{{2V}}{{7R}}\)

Three bulbs with individual power rating of 12 W, 2 W and 6 W respectively are connected as per the circuit diagram below. Find the amount of heat dissipated by each in 10 seconds.

A
120 J, 20 J, 60 J
Correct
B
8 J, 1.33 J, 4 J
C
12 J, 1.66 J, 5 J
D
10 J, 0.277 J, 2.5 J

Which of the following can produce a magnetic field?

A
Electric charges in motion
Correct
B
Electric charges at rest
C
Electric charges whether at rest or in motion
D
Only by permanent magnets

A wire is lying horizontally in the north-south direction and there is a horizontal magnetic field pointing towards the east. Some positive charges in the wire move north and an equal number of negative charges move south. The direction of force on the wire will be:

A
West
B
Down, into the page
Correct
C
Up, out of the page
D
East

Match the following: Phenomenon (i) Rainbow (ii) Twinkling of stars (iii) Blue colour of sky (iv) Advancement of sunrise and delay sunset Reason (A) scattering of light (B) dispersion of light (C) fluctuation of the refraction index in atmosphere layers (D) refraction of light

A
(i) – B, (ii) – D, (iii) – A, (iv) – C
B
(i) – B, (ii) – C, (iii) – A, (iv) – D
Correct
C
(i) – B, (ii) – A, (iii) – C, (iv) – D
D
(i) – D, (ii) – B, (iii) – A, (iv) – C

A person is suffering from both near sightedness and far sightedness. His spectacles would be made of

A
A convex lens as the upper lens and a concave lens as the lower lens
B
Two convex lenses with the upper lens having a larger focal length than the lower lens
Correct
C
Two concave lenses with the upper lens having a smaller focal length than the lower lens
D
A concave lens as the upper lens and a convex lens as the lower lens

Sound travels faster in:

A
Water
B
Steel
Correct
C
Air
D
Wood

Atomic clock is based on the principle of periodic vibration in the:

A
Uranium atom
B
Carbon atom
C
Polonium atom
D
Caesium atom
Correct

A truck and a car are moving with velocity v towards each other. They collide head in and stops after some time. If the time of collision is 1 se. which vehicle will have maximum change in momentum?

A
car
B
truck
C
both will have same
Correct
D
none of the above

A pandubbi sends a sonar signal to locate a body and receives the echo after 5 s. If the velocity of sound is 340 m/s. What is the distance of the body?

A
0.85 km
Correct
B
0.425 km
C
1.7 km
D
4.25 km

A convex lens is made of a material \((\mu = 1.2),\)both the surfaces are convex. If it is dipped in water \((\mu = 1.33)\) it will behave like

A
a prism
B
divergent lens
Correct
C
a rectangular slab
D
convergent lens

Several electric bulbs designed for 220 V supply line are rated 10 W. How many lamps can be lighted if connected in parallel with each other across the 220 V line if the maximum allowable current 5 A.

A
55
B
220
C
440
D
110
Correct