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12th Std Physics Important Questions. We covered all the 12th Std Physics Important Questions in this post for free so that you can practice well for the exam.
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12th Std Physics mcqs for Students
In a resonance tube setup, the first resonance occurs when the air column length is 10 cm and the second when it is 32 cm. The end correction of the tube is
a) 0.5 cm
b) 1 cm
c) 1.5 cm
d) 2 cm
Option b – 1 cm
Using a tuning fork of frequency 325 Hz in a resonance tube, the first two resonance lengths are noted as 25.4 cm and 77.4 cm. The speed of sound in air is
a) 318 m/s
b) 338 m/s
c) 358 m/s
d) 378 m/s
Option b – 338 m/s
In a resonance tube experiment, resonance with a tuning fork occurs at air column lengths of 12.5 cm and again at 40 cm. The end correction for the tube is
a) 1.25 cm
b) 2.50 cm
c) 1.375 cm
d) 2.00 cm
Option a – 1.25 cm
An air column at 15 °C produces 4 beats per second with a tuning fork, the fork having a lower frequency than the air column. When the temperature drops to 10 °C, the beat frequency reduces by one. The frequency of the tuning fork is
a) 106 Hz
b) 110 Hz
c) 113 Hz
d) 118 Hz
Option b – 110 Hz
A closed organ pipe of length 1.2 m filled with a gas resonates in its fundamental mode with a tuning fork. An open pipe of the same length filled with air also resonates with the same fork. At 40 °C, the speed of sound in air is 360 m/s. The speed of sound in the gas at this temperature is
a) 341.5 m/s
b) 637 m/s
c) 683 m/s
d) 720 m/s
Option d – 720 m/s
A resonance tube of length 1 m is SET into resonance using a tuning fork of frequency 300 Hz. If the speed of sound in air is 330 m/s, the number of harmonics that can be produced in the tube is
a) 1
b) 2
c) 3
d) 4
Option b – 2
In a resonance tube experiment with a tuning fork of frequency 325 Hz, the first two resonance lengths are measured as 25.4 cm and 77.4 cm. The end correction of the tube is
a) 0.2 cm
b) 0.3 cm
c) 0.4 cm
d) 0.6 cm
Option d – 0.6 cm
A tuning fork of frequency 500 Hz produces resonance in a tube at air column lengths of 17 cm and 52 cm. The speed of sound in air is
a) 170 m/s
b) 350 m/s
c) 520 m/s
d) 850 m/s
Option b – 350 m/s
An air column of length 20 cm in a resonance tube vibrates in unison with a tuning fork of frequency 250 Hz. The speed of sound in air is
a) 300 m/s
b) 200 m/s
c) 150 m/s
d) 75 m/s
Option b – 200 m/s
In a Kundt’s tube experiment, sound waves of frequency 1000 Hz are produced. The distance covering six consecutive nodes is 85 cm. The speed of sound in the gas inside the tube is
a) 330 m/s
b) 340 m/s
c) 350 m/s
d) 300 m/s
Option b – 340 m/s
When a resonance tube is excited using a tuning fork of frequency 256 Hz, resonance occurs at air column lengths of 35 cm and 105 cm. The approximate speed of sound is
a) 360 m/s
b) 512 m/s
c) 524 m/s
d) 36 m/s
Option a – 360 m/s
In a resonance tube experiment, the difference between the air column lengths for the first and second resonances is 31.5 cm. The wavelength of the sound wave is
a) 15.75 cm
b) 31.5 cm
c) 63.0 cm
d) 126.0 cm
Option c – 63.0 cm
In a resonance tube, the first resonance is obtained when the water level is 16 cm below the open end. Ignoring end correction, the next resonance will occur when the water level is at
a) 24 cm
b) 32 cm
c) 48 cm
d) 64 cm
Option c – 48 cm
We covered all the 12th std Physics important Questions above in this post for free so that you can practice well for the exam.
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Also, check out:
- Bharati Bhawan Class 12 Physics
- Class 12 Physics Chapter 1 Objective Questions in Hindi
- Zener Diode Experiment Class 12
