Thermodynamics Physics Class 11 MCQ. We covered all the Thermodynamics Physics Class 11 MCQ in this post for free so that you can practice well for the exam.
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MCQ on Thermodynamics Physics for NEET Students
A cannonball is fired from a cannon. The force on the ball is given by F = 10t² – t – 2, where F is in newtons and t in seconds. The force on the ball becomes zero as soon as it leaves the cannon. What is the average impulse imparted to the ball?
(A) 909 Ns
(B) 394.17 Ns
(C) 71.09 Ns
(D) zero
Option b – 394.17 Ns
The natural frequency of an LC circuit is 75 kHz. When the capacitor is totally filled with a dielectric material, the natural frequency decreases by 15 kHz. The dielectric constant of the material is nearly
(A) 3.33
(B) 2.12
(C) 1.56
(D) 1.91
Option c – 1.56
The diode used for detecting optical signals is ………
(A) Zener diode
(B) photodiode
(C) LED
(D) junction diode
Option b – photodiode
Two tuning forks A and B vibrating simultaneously produce 7 beats. The frequency of B is 512 Hz. It is seen that if one arm of A is filed, then the number of beats increases. The frequency of A will be
(A) 502 Hz
(B) 507 Hz
(C) 517 Hz
(D) 519 Hz
Option d – 519 Hz
A body of mass 4 kg strikes elastically with another body at rest and continues to move in the same direction with one-fourth of its initial velocity. The mass of the other body is
(A) 0.6 kg
(B) 2.4 kg
(C) 3.0 kg
(D) 4.0 kg
Option b – 2.4 kg
The amount of work done in increasing the voltage across the plates of the capacitor from 3 V to 6 V is ‘W’. The work done in increasing it from 6 V to 9 V will be
(A) W
(B) 0.6 W
(C) 1.25 W
(D) 1.67 W
Option d – 1.67 W
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance R, connected across the given cell, has values of i. infinity ii. 10 Ω the balancing lengths on the potentiometer wire are found to be 2.72 m and 2.6 m, respectively. The value of the internal resistance of the cell is
(Α) 0.25 Ω
(Β) 0.98 Ω
(C) 0.46 Ω
(D) 0.73 Ω
Option c – 0.46 Ω
The surface energy of a liquid drop is U. It is split into 125 equal droplets. Then its surface energy becomes
(A) 5 U
(B) 25 U
(C) 100 U
(D) 125 U
Option a – 5 U
If the ratio of gravitational acceleration at point A to point B is zero, then
(A) point A is at a height equal to the radius of the earth above the surface and point B is at a depth equal to the half radius of the earth below the surface.
(B) point A is at a height equal to the half radius of the earth above the surface and point B is the north pole of the earth.
(C) point A is at a depth equal to the half radius of the earth below the surface and point B is the south pole.
(D) point A is the center of the earth and point B is at a height equal to the radius of the earth above the surface of the earth.
Option d – point A is the center of the earth and point B is at a height equal to the radius of the earth above the surface of the earth.
A particle executes SHM of period 1.5 s and amplitude 10 cm. The time it takes to travel 4 cm from the positive extremity of its oscillation is (Given: cos 53° = 0.6)
(A) 0.17 s
(B) 0.22 s
(C) 0.41 s
(D) 0.41 s
Option b – 0.22 s
A parallel beam of fast-moving electrons is incident normally on a narrow slit. A screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statement is correct?
(A) The angular width of the central maxima will remain the same.
(B) The angular width of the central maxima will decrease.
(C) The angular width of the central maxima of the diffraction pattern will increase.
(D) The diffraction pattern is not observed on the screen in the case of electrons.
Option b – The angular width of the central maxima will decrease.
An aircraft loops the loop of radius 600 m with a velocity of 360 km/h at the lowest point. The force on the flyer of mass 75 kg, in the lower part of the loop, is (Take g = 10 m/s²)
(A) 1400 N.
(B) 1800 N.
(C) 2100 N.
(D) 2000 N.
Option d – 2000 N.
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