Quarter 2

1

Reflection of sound follows the law of:

A Refraction B Diffraction C Reflection D Interference

2

Echo is an example of:

A Refraction B Reflection C Diffraction D Interference

3

The region of low pressure in a sound wave is called:

A Compression B Echo C Rarefaction D Pitch

4

Sound requires which medium to travel?

A Only solids B Only liquids C Only gases D Material medium

5

Sound waves are:

A Transverse waves B Electromagnetic waves C Longitudinal waves D Surface waves

6

Static charges are produced mainly by:

A Chemical reactions B Friction C Heating D Radiation

7

Quality or timbre of sound helps us to distinguish sounds from:

A Same source B Different sources C Same frequency D Same pitch

8

Which material is an insulator?

A Iron B Aluminum C Plastic D Silver

9

Eardrum is also known as:

A Cochlea B Tympanic membrane C Oval window D Semicircular canal

10

The bending of light around sharp edges is called:

A Reflection B Refraction C Diffraction D Dispersion

11

Which factor does NOT affect the speed of sound in air?

A Temperature B Humidity C Pressure D Density

12

Hypermetropia is corrected using:

A Concave lens B Convex lens C Plane mirror D Prism

13

Which particle is responsible for electric charge?

A Proton B Neutron C Electron D Photon

14

Which law of reflection states that the angle of incidence is equal to the angle of reflection?

A First law of reflection B Second law of reflection C Law of refraction D Snell’s law

15

Ultrasound has frequency:

A Below 20 Hz B Between 20 Hz and 20 kHz C Above 20 kHz D Equal to 20 Hz

16

Which color deviates the most when passing through a prism?

A Red B Yellow C Green D Violet

17

Which quantity remains constant when light travels from air into glass?

A Speed B Wavelength C Frequency D Direction

18

Electric field lines end on:

A Positive charges B Neutral bodies C Negative charges D Conductors

19

Which part of ear converts sound vibrations into electrical signals?

A Pinna B Cochlea C Eardrum D Auditory canal

20

SI unit of electric field is:

A Volt B Newton C Newton per coulomb D Coulomb

21

Loudness of sound depends upon:

A Frequency B Speed C Amplitude D Wavelength

22

Spray painting uses electrostatics to:

A Reduce paint usage B Increase heat C Produce sound D Increase voltage

23

The bones of middle ear are called:

A Vertebrae B Ossicles C Cartilage D Ligaments

24

Which color has the shortest wavelength in the visible spectrum?

A Red B Green C Blue D Violet

25

What happens during discharging?

A Charge increases B Charge remains constant C Charge flows away D New charge is produced