Physics 914 MCQs [All-Courses]

Physics is a core science subject that deals with the study of matter, energy, motion, force, heat, light, electricity, magnetism, and modern physics concepts. It plays a vital role in competitive exams such as PPSC, FPSC, NTS, OTS, KPPSC, BPSC, AJKPSC, CSS, and PMS, where questions test conceptual understanding, numerical problem-solving, and application of laws and formulas.

Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

A Dopplers effect

B Interference of waves

C Beats phenomena

D All of these

Review Detailed Answer

Correct Answer: Dopplers effect

The speed of stationary waves in a stretched string are independent of___________________?

A Number of loops

B Tension in the string

C Point where string is plucked

D both A and C

Review Detailed Answer

Correct Answer: both A and C

The speed of sound in hydrogen is _____________ time than that in oxygen?

A Two times

B Three times

C Four time

D Six time

Review Detailed Answer

Correct Answer: Four time

Newton estimated the speed of sound _____________________?

A 281m/sec

B 333m/sec

C 340m/sec

D all of the above

Review Detailed Answer

Correct Answer: 281m/sec

Which one is the correct relation for fundamental frequency of open and closed pipe ?

A fopen = 2 fclosed

B fclosed = 2fopen

C fopen = fclosed

D fopen = 1 / f closed

Review Detailed Answer

Correct Answer: fopen = 2 fclosed

When the source of sound moves away form a stationary listener then ______________ occurs?

A an apparent increase in frequency

B an apparent decrease in frequency

C an apparent decrease in wavelength

D no apparent change in frequency

Review Detailed Answer

Correct Answer: an apparent decrease in frequency

Silence zone takes place due to____________________?

A constructive interference

B destructive interference

C beats

D resonance

Review Detailed Answer

Correct Answer: destructive interference

The number of beats produced per second is equal to____________________?

A the sum of the frequencies of two tuning forks

B the difference of the frequencies of two tuning forks

C the ratio of the frequencies of two tuning forks

D the frequency of either of the two tuning forks

Review Detailed Answer

Correct Answer: the difference of the frequencies of two tuning forks

Ultrasonic have__________________?

A frequency in the audible range

B frequency is greater than 20 kHz

C frequency lower than 20 Hz

D all of above

Review Detailed Answer

Correct Answer: frequency is greater than 20 kHz

The velocity of sound in air would become double than its velocity at 0°C at temperature ?

A 313°C

B 586°C

C 819°C

D 1172°C

Review Detailed Answer

Correct Answer: 819°C

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Physics 914 MCQs [All-Courses]

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All Topics 914

Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

The speed of stationary waves in a stretched string are independent of___________________?

The speed of sound in hydrogen is _____________ time than that in oxygen?

Newton estimated the speed of sound _____________________?

Which one is the correct relation for fundamental frequency of open and closed pipe ?

When the source of sound moves away form a stationary listener then ______________ occurs?

Silence zone takes place due to____________________?

The number of beats produced per second is equal to____________________?

Ultrasonic have__________________?

The velocity of sound in air would become double than its velocity at 0°C at temperature ?