Academictask provides MCQs of Physics from Basic to Advance, so that you can prepare accordingly. Physics Mcqs section is useful for both students and job seekers i.e MCAT ECAT ETEA test preparation, PPSC Test, FPSC Test, SPSC Test, KPPSC Test, BPSC Test, other competitive and entry test preparations. Here you will find physics MCQs and answers with detailed explanations. MCQs of Physics include basic physics MCQs, Measurements MCQs, Vectors And Equilibrium MCQs, Work and Energy MCQs, Motion and Force MCQs, Circular Motion MCQs, Fluid Dynamics MCQs, Waves MCQs, Heat and Thermodynamics MCQs, Current Electricity MCQs, Electrostatics MCQs, Electromagnetism MCQs, Electromagnetic Induction MCQs, Alternating Current MCQs, Nuclear Physics MCQs, etc.

91. Laplace found that the alternate compressions and rarefactions produced in sound waves follows ________________?

A. isothermal law
B. adiabatic law
C. isochoric law
D. all of the above

92. The beats frequency (sensible) for a human car is _____________________?

A. 42Hz
B. 7 Hz
C. 256Hz
D. 262Hz

93. Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?

A. One
B. Two
C. Four time
D. None of these

94. The current through a metallic conductor is due to the motion of _________________?

A. free electrons
B. protons
C. neutrons
D. still under controversy

95. A wire having very high value of conductance is said to be____________________?

A. very good conductor
B. moderately good conductor
C. an insulator
D. no specific criterion available

96. Production of heat due to an electric current flowing through a conductor is given by _________________?

A. Joule effect
B. Joule Thomsons effect
C. Comptons effect
D. Feed back effect

97. Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ?

A. 40 W
B. 90W
C. 100W
D. 120W

98. Thermocouples convert___________________?

A. heat energy into electrical energy
B. heat energy into light energy
C. heat energy into mechanical energy
D. mechanical energy into heat energy

99. The dimension of elastic modulus is ___________________ ?

A. ML-1T-2
B. ML-2T-2
C. MLT-2
D. ML2T-2

100. Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?

A. Longitudinal
B. Transverse
C. Periodic
D. both A and C

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