KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 151 - 154 of 268

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Question number: 151

» Oscillations and Waves » Free Forced and Damped Oscillations

MCQ▾

Question

If an oscillator completes 200 oscillations, its amplitude decreases to Equation of its initial value. When it completes 400 oscillations, the amplitude will be –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 152

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

MCQ▾

Question

An ideal gas Equation expands from Equation to Equation at a constant pressure of Equation . The heat energy supplied to the gas in this process is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 153

» Oscillations and Waves » Wave Motion

Appeared in Year: 2015

MCQ▾

Question

The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 154

» Kinematics » Relative Velocity

MCQ▾

Question

A cart is moving along x direction with a velocity of 3 ms-1. A person on the cart throws a stone with a velocity of 8 ms-1 relative to himself. In the frame of reference of the cart the stone is thrown in Equation plane making an angle of 600 with vertical y axis. The speed of stone at highest point of the trajectory the stone is –

Choices

Choice (4) Response

a.

2 ms-1

b.

5 ms-1

c.

4 ms-1

d.

2.5 ms-1

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