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.

261. The operation of a transistor requires______________?
A. That the emitter be heated
B. That the base be heated
C. That the collector be heated
D. None of the above

262. Non-inverting amplifier circuits have____________?
A. A very high input impedance
B. A very low input impedance
C. A low output impedance
D. None of the above

263. An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?
A. Non-inverting voltage at output
B. Reference voltage on the other
C. Virtual input
D. Output

264. The working of transistor as amplifier is similar to________________?
A. Step up transformer
B. Step down transformer
C. Three diodes in common
D. Triode vacuum tube

265. To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?
A. 2
B. 3
C. 4
D. 5

266. In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________?
A. Equal to D.C. value
B. More than D.C. value
C. Less than D.C. value
D. Zero

267. In forward bias the width of potential barrier_____________?
A. Increases
B. Decreases
C. Remains same
D. No effect

268. The electronic circuits which implement the various logic operations are called_____________?
A. Logic gates
B. Boolean algebra
C. Amplifier gain
D. Logic functions

269. Acceptor and donor impurities donate______________?
A. n-carriers only
B. p-carriers only
C. p-carriers and n-carriers respectively
D. n-carriers and p-carriers respectively

270. An OP-AMPs can amplify_______________?
A. D.C.
B. A.C.
C. Both A.C. & D.C.
D. None of the above