Free Physics11 Practice Test - IAS 

Question 1

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

A. 5 ohm
B. 10 ohm
C. 20 ohm
D. 40 ohm

SOLUTION

Solution : B

Option:(b)

Question 2

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

A.
B.
C.
D.

SOLUTION

Solution : 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?

A. 1 and 2
B. 3 and 4
C. 1, 2 and 4
D. 2, 3 and 4

SOLUTION

Solution : C

Option:(c)

Question 4

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

A. 100/6 kg
B. 60 kg
C. 100 kg
D. 600 kg

SOLUTION

Solution : C

Option: (c)

Question 5

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

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

SOLUTION

Solution : A

Option:(a)

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

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

SOLUTION

Solution : C

Option:(c)

Question 7

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

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

SOLUTION

Solution : C

Option:(c)

Question 8

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?

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

SOLUTION

Solution : C

Option:(c)

Question 9

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

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

SOLUTION

Solution : D

Option:(d)

Question 10

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

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

SOLUTION

Solution : D

Option:(d)

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