Physics Chapter Waves Mcqs

#49
The law of reflection states that

A) Angle of incidence = Angle of reflection

B) Angle of incidence > Angle of reflection

C) Angle of incidence < Angle of reflection

D) Angle of incidence + Angle of reflection = 90°

Answer: A

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#50
The law of refraction is given by

A) Snell’s law

B) Hooke’s law

C) Boyle’s law

D) Charles’ law

Answer: A

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#51
The speed of sound in air is 332 m/s at 0°C. The speed at 20°C is about

A) 343 m/s

B) 350 m/s

C) 360 m/s

D) 370 m/s

Answer: A

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#52
The speed of sound in air is proportional to the square root of its

A) Density

B) Pressure

C) Temperature

D) Volume

Answer: C

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#53
The speed of sound in a gas is independent of its

A) Density

B) Pressure

C) Temperature

D) All of these

Answer: D

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#54
The speed of sound in a gas is directly proportional to the square root of its

A) Density

B) Pressure

C) Temperature

D) Volume

Answer: C

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#55
The ratio of speed of sound in helium to that in air at the same temperature is about

A) 1:1

B) 1:2

C) 2:1

D) 3:1

Answer: C

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#56
The frequency of a sound wave is 440 Hz. The wavelength in air at 20°C is about (speed = 343 m/s)

A) 0.78 m

B) 1.56 m

C) 3.12 m

D) 6.24 m

Answer: A

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Physics

#49 The law of reflection states that

A) Angle of incidence = Angle of reflection B) Angle of incidence > Angle of reflection C) Angle of incidence < Angle of reflection D) Angle of incidence + Angle of reflection = 90°

Comments:

#50 The law of refraction is given by

A) Snell’s law B) Hooke’s law C) Boyle’s law D) Charles’ law

Comments:

#51 The speed of sound in air is 332 m/s at 0°C. The speed at 20°C is about

A) 343 m/s B) 350 m/s C) 360 m/s D) 370 m/s

Comments:

#52 The speed of sound in air is proportional to the square root of its

A) Density B) Pressure C) Temperature D) Volume

Comments:

#53 The speed of sound in a gas is independent of its

A) Density B) Pressure C) Temperature D) All of these

Comments:

#54 The speed of sound in a gas is directly proportional to the square root of its

A) Density B) Pressure C) Temperature D) Volume

Comments:

#55 The ratio of speed of sound in helium to that in air at the same temperature is about

A) 1:1 B) 1:2 C) 2:1 D) 3:1

Comments:

#56 The frequency of a sound wave is 440 Hz. The wavelength in air at 20°C is about (speed = 343 m/s)

A) 0.78 m B) 1.56 m C) 3.12 m D) 6.24 m

Comments:

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#49
The law of reflection states that

A) Angle of incidence = Angle of reflection

B) Angle of incidence > Angle of reflection

C) Angle of incidence < Angle of reflection

D) Angle of incidence + Angle of reflection = 90°

#50
The law of refraction is given by

A) Snell’s law

B) Hooke’s law

C) Boyle’s law

D) Charles’ law

#51
The speed of sound in air is 332 m/s at 0°C. The speed at 20°C is about

A) 343 m/s

B) 350 m/s

C) 360 m/s

D) 370 m/s

#52
The speed of sound in air is proportional to the square root of its

A) Density

B) Pressure

C) Temperature

D) Volume

#53
The speed of sound in a gas is independent of its

A) Density

B) Pressure

C) Temperature

D) All of these

#54
The speed of sound in a gas is directly proportional to the square root of its

A) Density

B) Pressure

C) Temperature

D) Volume

#55
The ratio of speed of sound in helium to that in air at the same temperature is about

A) 1:1

B) 1:2

C) 2:1

D) 3:1

#56
The frequency of a sound wave is 440 Hz. The wavelength in air at 20°C is about (speed = 343 m/s)

A) 0.78 m

B) 1.56 m

C) 3.12 m

D) 6.24 m