ICS Part 1 Physics English Medium Chapter 7 Online Short Questions Test with Answers

Question # 1

Define driven harmonic oscillator and damped oscillations.

Ans 1: Damped Oscillations: TheOscillations in which the amplitude decreases steadily with time are called damped oscillations.

Driven harmonic oscillator: The physical system undergoing forced vibrations is known as driven harmonic oscillator.

Question # 2

Describe free vibrations.

Ans 1: A Body is said to be executing free vibrations when it oscillates without the interference of an external force.

Question # 3

Can we realize an ideal simple pendulum?

Ans 1: No, we can't realize an ideal simple pendulum. Because an ideal simple pendulum should consist of a heavy but small metallic bob suspended from a frictionless rigid support by means of long, weightless and inextensible string.

Question # 4

Explain free and forced oscillations.

Ans 1: Free oscillations; A body is said to be executing free vibrations when it oscillates without the interference of an external force.

Forced oscillations: If an oscillating system is subjected to an external periodic force, then forced vibrations will take place.
- The vibrations of a factory floor caused by the running of heavy machinery is an example of forced vibrations.
- The mass of a vibrating pendulum is struck repeatedly, the forced vibration are produced.

Question # 5

Define resonance.Write its one example.

Ans 1: When the frequency of the applied force is equal to the natural frequency of simple harmonic oscillator, the periodic amplitude of the motion may become extraordinary large. This phenomenon is called resonance.
1. A swing is a good example of mechanical resonance.
2. Turning a radio is the example of electrical resonance.

Question # 6

Define vibratory motion.

Ans 1: The to and fro motion of a body about a fixed point is called the vibratory or oscillatory motion.

Question # 7

Write one advantage and one disadvantage of resonance.

Ans 1: Advantage: A swing is a good example of mechanical resonance. If a series of regular pushes are given to the swing , its motion can be built up enormously .
Disadvantages: The rhythmic march of column of soldiers on a bridge of long span might set up oscillations of dangerously large amplitude in the bridge structure. Bridge can be collapsed due to violent resonance oscillations. They are advised break their steps.

Question # 8

What do you understand by forced vibration? Explain with examples.

Ans 1: If an oscillation system is subjected to an external periodic force, then force vibrations will take place.
1. The vibrations of a factory floor caused by the running of heavy machinery is a example of forced vibrations.
2. The mass of a vibrating pendulum is struck repeatedly, the forced vibrations are produced .

Question # 9

Why the amplitude of lead bob is greater than pith ball as the bobs having equal size and length set into vibration?

Ans 1: It is because the mass of lead bob is much greater than the very light pith ball, so lead bob can travel to greater extent in air against the resistive and retarding forces. Lead bob has greater inertia.

Question # 10

What is sharpness of resonance?

Ans 1: The amplitude s well as its sharpness< both depend upon the damping. Smaller the damping, greater will be the amplitude and more sharp will be the resonance.

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ICS Part 1 Physics English Medium Chapter 7 Online Short Questions Test with Answers

Online Short Questions For Chapter 7 "ICS Part 1 Physics Chapter 7 Short Questions Test "

Physics - ICS Part 1 Physics Chapter 7 Short Questions Test

Define driven harmonic oscillator and damped oscillations.

Describe free vibrations.

Can we realize an ideal simple pendulum?

Explain free and forced oscillations.

Define resonance.Write its one example.

Define vibratory motion.

Write one advantage and one disadvantage of resonance.

What do you understand by forced vibration? Explain with examples.

Why the amplitude of lead bob is greater than pith ball as the bobs having equal size and length set into vibration?

What is sharpness of resonance?

Prepare Complete Set Wise Questions For Chapter 7 "ICS Part 1 Physics Chapter 7 Short Questions Test "

Set 1

Set 2

Set 3

ICS Part 1 Physics Chapter 7 Short Questions Test - Set 1

Define driven harmonic oscillator and damped oscillations.

Describe free vibrations.

Can we realize an ideal simple pendulum?

Explain free and forced oscillations.

Define resonance.Write its one example.

Define vibratory motion.

Write one advantage and one disadvantage of resonance.

What do you understand by forced vibration? Explain with examples.

Why the amplitude of lead bob is greater than pith ball as the bobs having equal size and length set into vibration?

What is sharpness of resonance?

ICS Part 1 Physics Chapter 7 Short Questions Test - Set 2

Define Simple Harmonic Oscillator and driven harmonic oscillator.

What is the total distance travelled by an object moving with SHM in a time equal to its period, if its amplitude is A?

Write one advantage and one disadvantage of resonance.

The amplitude of simple pendulum should be small, Why?

Why the amplitude of lead bob is greater than pith ball as the bobs having equal size and length set into vibration?

If a heavy and light masses of same size are set into vibration, which of them will stop first?

What is sharpness of resonance?

What are damped oscillations?

Describe some common phenomena in which resonance plays an important role.

Define resonance.Write its one example.

ICS Part 1 Physics Chapter 7 Short Questions Test - Set 3

Define driven harmonic oscillator and damped oscillations.

Can we realize an ideal simple pendulum?

Why the enthalpy of neutralization has the same value for any strong acid with any strong base?

How cooking of food is possible in micro-wave oven?

Describe some common phenomena in which resonance plays an important role.

Described some common phenomena in which resonance plays an important role.

Define resonance.Write its one example.

Why soldiers are advised to break their steps when marching on a bridge?

What are damped oscillations?

What is slinky spring ?

ICS Part 1 Physics Short Questions Test

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