Question # 1

The technique or method used to absorb undesirable sounds by soft and porous surface is called:

Choose an answer

Ultrasonic

Acoustic protection

Infrasonics

Echo

Electric field lines:

Choose an answer

always cross each other

never cross each other

cross each other inthe region of strong field

cross each other in the region of weak field

The speed of sound was accurately measured in:

Choose an answer

1736

1737

1738

1739

The speed of sound in iron at 25°C is:

Choose an answer

5950 m/sec

5900 m/sec

6950 m/sec

6940 m/sec

The intensity level of train siren is:

Choose an answer

150 dB

100 dB

130 dB

120 dB

A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is:

Choose an answer

4 times smaller than before

4 times larger than before

8 times larger than before

16 times larger than before.

The speed of sound in air at 100°C is:

Choose an answer

380ms-1

382ms-1

386ms-1

300ms-1

One coulomb is equal to charge of ________ electrons.

Choose an answer

6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

Ultrasound waves carry energy:

Choose an answer

Less

More

Equal

None of these

Capacitance is defined as:

Choose an answer

VC

Q/V

QV

V/Q

The sound level of rustling of leave is:

Choose an answer

1 dB

20 dB

30 dB

10 dB

Bats can hear sound of frequency up to:

Choose an answer

100,000Hz

25000Hz

120, 000Hz

1000Hz

The SI the unit of charge is:

Choose an answer

Jpi;e

Volt

Coulomb

Watt

More Classes

Other Links

Physics 10th Class English Medium Unit 4 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer