Physics Test

Result

Physics Test - 25

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Weekly Quiz Competition

Question 1
1 / -0

Three sound waves of equal amplitudes have frequencies (v – 1), v, (v + 1). They superpose to give beats. The number of beats produced per second will be

A

2

B

4

C

3

D

1
Question 2
1 / -0

A

Option 2

B

Option 3

C

Option 1

D

Option 4
Question 3
1 / -0

A jar filled with two non mixing liquids 1 and 2 having densities ρ1 and ρ2 respectively. A solid ball, made of a material of density ρ3, is dropped in the jar. It comes to equilibrium in the position shown in the figure. Which of the following is true for ρ1, ρ2 and ρ3?

A

ρ2 < ρ3 < ρ1

B

ρ1 < ρ3 < ρ2

C

ρ1 < ρ2 < ρ3

D

ρ3 < ρ1 < ρ2
Question 4
1 / -0

This question contains Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.Statement – 1: For a charged particle moving from point P to point Q, the net work done by anelectrostatic field on the particle is independent of the path connecting point P to point Q.Statement-2: The net work done by a conservative force on an object moving along a closed loop is zero

A

Statement-1 is false, Statement-2 is true

B

Statement-1 is true, Statement-2 is false

C

Statement-1 is true, Statement-2 is true; Statement-2 is not the correct explanation of Statement-1.

D

Statement-1 is true, Statement-2 is true; Statement-2 is the correct explanation of Statement-1.
Question 5
1 / -0

Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. Question : The value of the unknown resistor R is

A

220 Ω

B

55 Ω

C

110 Ω

D

13.75 Ω
Question 6
1 / -0

A motor cycle starts from rest and accelerates along a straight path at 2 m/s^2 . At the starting point of the motor cycle there is a stationary electric sire. How far has the motor cycle gone when the driver hears the frequency of the siren at 94% of its value when the motor cycle was at rest? (speed of sound = 330 ms^-1).

A

147 m

B

196 m

C

98 m

D

49 m
Question 7
1 / -0

Consider a uniform square plate of side ‘a’ and mass ‘m’. The moment of inertia of this plate about an axis perpendicular to its plane and passing through one of its corners is

A

1/12 ma^2

B

2/3 ma^2

C

7/12 ma^2

D

5/6 ma^2
Question 8
1 / -0

Directions: Question is based on the following paragraph. A current loop ABCD is held fixed on the plane of the paper as shown in the figure. The arcs BC (radius = b) and DA (radius = a) of the loop are joined by two straight wires AB and CD. A steady current I is flowing in the loop. Angle made by AB and CD at the origin O is 30 deg. Another straight thin wire with steady current I1 flowing out of the plane of the paper is kept at the origin. Question : Due to the presence of the current I1 at the origin

A

Neither of these

B

The forces on AB and DC are zero.

C

Both The forces on AB and DC are zero and The forces on AD and BC are zero.

D

The forces on AD and BC are zero.
Question 9
1 / -0

A

Option 3

B

Option 2

C

Option 4

D

Option 1
Question 10
1 / -0

A

Option 1

B

Option 2

C

Option 3

D

Option 4