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

Question # 1

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 # 2

What are damped oscillations?Give some of its applications.

Ans 1: The oscillations in which the amplitude decreases steadily with time are called damped oscillations
For example
- The shock absorber of a car
- Motion of any microscopic system

Question # 3

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

Ans 1: The column of soldiers, while marching on a bridge of long span is advised to break their steps. Because their rhythmic march might set up oscillation of dangerously large amplitude in the bridge structure.

Question # 4

Briefly give two phenomena in which resonance plays an important role.

Ans 1: 1) Tuning a radio, we turn the knob to make the natural frequency of the electric circuit of receiver equal to the transmission frequency of the radio station. When the two frequencies match, energy absorption is maximum and this is the only station we hear.
2)Food can be easily cooked in a microwave oven. The waves produced in this type of oven have a frequency of 2450 Mhz. At this frequency the waves are absorbed due to resonance by water and fat molecules in the food.

Question # 5

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 # 6

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

Ans 1: Light mass will stop first.
The damping effect for the light mass due to air resistance is much greater than the heavy mass. Therefore, it will stop first.

Question # 7

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

Ans 1: The total distance travelled by an object moving with SHM in its time period is 4A, where A is amplitude of vibration.

Question # 8

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 # 9

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

Ans 1: Tuning of a radio: It is a good example of electrical resonance. For tuning we turn the knob of a radio which changes the natural frequency of electrical circuit of receiver until it becomes equal to the frequency of the transmitter. So resonance is produced and energy absorption is maximum. Hence a station is tuned and we can hear the transmission of desired station .
Microwave oven: The waves produced in this type of oven have a wavelength of 12cm at a frequency of 2450 Mhz at this frequency the waves are absorbed due to resonance by water and fat molecules in the food resulting in efficient and evenly heating and cooking of food.

Question # 10

How the phenomenon of resonance is produced?

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. Tuning a radio is the example of electrical 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

Explain free and forced oscillations.

What are damped oscillations?Give some of its applications.

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

Briefly give two phenomena in which resonance plays an important role.

Describe free vibrations.

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

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

Define driven harmonic oscillator and damped oscillations.

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

How the phenomenon of resonance is produced?

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

Explain free and forced oscillations.

What are damped oscillations?Give some of its applications.

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

Briefly give two phenomena in which resonance plays an important role.

Describe free vibrations.

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

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

Define driven harmonic oscillator and damped oscillations.

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

How the phenomenon of resonance is produced?

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

Describe free vibrations.

Define Simple Harmonic Oscillator and driven harmonic oscillator.

Define (a) resonance (b) damping

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

What are damped oscillations?Give some of its applications.

Define resonance.Write its one example.

The amplitude of simple pendulum should be small, Why?

What are damped oscillations?

Explain free and forced oscillations.

How a particular station is tuned in radio?

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

How the phenomenon of resonance is produced?

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

Define Simple Harmonic Oscillator and driven harmonic oscillator.

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

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

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

What is slinky spring ?

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

Differentiate between damped oscillation and undamped oscillations.

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

ICS Part 1 Physics Short Questions Test

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