KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 121 - 124 of 268

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Question number: 121

» Rotational Motion » Moment of Inertia

Appeared in Year: 2015

MCQ▾

Question

The moments of inertia of a non – uniform circular disc (of mass M and radius R) about four mutually perpendicular tangents AB, BC, CD, DA are I1, I2, I3 and I4, respectively (the square ABCD circumscribes the circle). The distance of the centre of mass of the disc from its geometrical centre is given by,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 122

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2015

MCQ▾

Question

Two blocks of masses 5m and 4m in contact on a smooth table. A force P is first applied horizontally on block of mass 5 m and then on 4m. The contact forces between the two blocks in the two cases in the ratio

Two blocks of different masses connected

Two Blocks of Different Masses Connected

In figure two blocks of different masses 5 m and 4 m in contact on a smooth table. Force P is applied on both the block one by one.

Choices

Choice (4) Response

a.

3: 2

b.

5: 3

c.

2: 3

d.

1: 2

Question number: 123

» Rotational Motion » Moment of Inertia

MCQ▾

Question

A homogeneous sphere of mass M and radius R has moment of inertia I about its diameter. A concentric sphere of radius is carved out from the sphere. What is the moment of inertia of the remaining part about the diameter?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 124

» Electrostatics » Electric Potential

Appeared in Year: 2013

MCQ▾

Question

The figure below shows a circuit and its input voltage as function of time t.

Circuit diagram and its input voltage as function of time

Circuit Diagram and Its Input Voltage as Function of Time

In figure Circuit diagram consist of two diodes and two batteries of 1 V and 3 V and a resistor. Also input voltage as function of time t is shown in figure.

Assuming the diodes to be ideal, which of the following graphs depicts the output voltage V0 as function of time t?

Choices

Choice (4) Response

a.

 Graph of output potential verses time - Choice - A

Graph of Output Potential Verses Time - Choice - A

In figure graph of output voltage verses time is shown.

b.

Graph of output potential verses time - Choice - B

Graph of Output Potential Verses Time - Choice - B

In figure graph of output voltage verses time is shown.

c.

Graph of output potential verses time - Choice - C

Graph of Output Potential Verses Time - Choice - C

In figure graph of output voltage verses time is shown.

d.

Graph of output potential verses time - Choice - D

Graph of Output Potential Verses Time - Choice - D

In figure graph of output voltage verses time is shown.

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