KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 103 - 105 of 250

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Question number: 103

» Electrostatics » Equipotential Surfaces

Appeared in Year: 2012

MCQ▾

Question

Consider three concentric metallic spheres A, B and C of radii a, b, c respectively where a<b<c . A and B are connected whereas C is grounded. The potential of the middle sphere B is raised to V then the charge on the sphere C is –

Choices

Choice (4) Response

a.

zero

b.

+4πε0Vbccb

c.

4πε0Vbccb

d.

4πε0Vacca

Question number: 104

» Work, Energy and Power » Conservation of Mechanical Energy

Appeared in Year: 2013

MCQ▾

Question

A point particle of mass 0.5 kg is moving along the x-axis under a force described by the potential energy V shown below. It is projected towards the right from the origin with a speed v. What is the minimum value of v for which the particle will escape infinitely far away from the origin?

Graph of potential energy verses position on x-axis

Graph of Potential Energy Verses Position on X-Axis

Figure shows a point particle of mass 0.5 kg is moving along the x-axis under a force described by the potential energy V.

Choices

Choice (4) Response

a.

22ms1

b.

2ms1

c.

4ms1

d.

All of the above

Question number: 105

» Oscillations and Waves » Doppler Effect in Sound

Appeared in Year: 2014

MCQ▾

Question

A whistle emitting a loud sound of frequency 540 Hz is whirled in a horizontal circle of radius 2 m and at a constant angular speed of 15 rad/s. The speed of sound is 330 m/s. The ratio of the highest to the lowest frequency heard by a listener standing at rest at a large distance from the center of the circle is –

Choices

Choice (4) Response

a.

1.1

b.

1.2

c.

1.4

d.

1.0

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