Questions and answers for exam Preparation

MCQs

Total Questions : 10

Two wires have their lengths, diameters and resistances all in the ratio 1:2. If the resistance of the thinner wire is 10 ohm, the resistance of the thicker wire is

5 ohm
10 ohm
20 ohm
40 ohm

Discuss Question

Answer: Option B. -> 10 ohm
:
B

Option:(b)

Question 2.

Which of the following distance-time graph (x-t) represents one-dimensional uniform motion?

Discuss Question

Answer: Option D. ->

:
D

Option:(d)

Question 3.

Consider the following statements A simple pendulum is set into oscillation. Then
1.The acceleration is zero when the bob passes through the mean position.
2.In each cycle the bob attains a given velocity twice.
3.Both acceleration and velocity of the bob are zero when it reaches its extreme position during the oscillation.
4.The amplitude of oscillation of the simple pendulum decreases with time.
Which of these statements are correct?

1 and 2
3 and 4
1, 2 and 4
2, 3 and 4

Discuss Question

Answer: Option C. -> 1, 2 and 4
:
C

Option:(c)

Question 4.

Assertion (A): In the visible spectrum of light, red light is more energetic than green light.
Reason (R) : The wavelength of red light is more than that of green light.Codes

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

Discuss Question

Answer: Option D. -> A is false but R is true
:
D

Option:(d)

Question 5.

The mass of a body on earth is 100 kg (acceleration due to gravity, g_e =10 m/s². If acceleration due to gravity on the moon is g_e /6, then the mass of the body on the moon is

100/6 kg
60 kg
100 kg
600 kg

Discuss Question

Answer: Option C. -> 100 kg
:
C

Option: (c)

Question 6.

Assertion (A): In a motion picture, usually 24 frames are projected every second over the whole length of the film.
Reason (R): An image formed on the retina of eye persists for about 0.1s after the removal of stimulus.
Codes

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

Discuss Question

Answer: Option C. -> A is true but R is false
:
C

Option:(c)

Question 7.

Assertion (A): Radio waves bend in a magnetic field.
Reason (R): Radio waves are electromagnetic in nature.
Codes

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

Discuss Question

Answer: Option D. -> A is false but R is true
:
D

Option:(d)

Question 8.

Assertion (A): Small glass beads fixed on traffic signals glow brightly when light falls upon them.
Reason (R): Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.
Codes

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

Discuss Question

Answer: Option A. -> Both A and R are true and R is the correct explanation of A
:
A

Option:(a)

Question 9.

Consider the following statements
1.If magenta and yellow coloured circles intersect, the intersected area will have red colour.
2.If cyan and magenta coloured circles intersect, the intersected area will have blue colour.
Which of the above statements is/are correct?

1 only
2 only
Both 1 and 2
Neither 1 nor 2

Discuss Question

Answer: Option C. -> Both 1 and 2
:
C

Option:(c)

Question 10.

Assertion (A) : A man standing on a completely frictionless surface can propel himself by whistling.
Reason (R) : If no external force acts on a system, its momentum cannot change. Codes