16 Semiconductor Devices Multiple Choice Questions 1. A pure semiconductor is known as (A) extrinsic semiconductor (B) intrinsic semiconductor (C) p-type semiconductor (D) n-type semiconductor Ans. (B) intrinsic semiconductor 2.…
15 Structure of Atoms and Nuclei Multiple Choice Questions 1. Which of the following quantities has same units and dimensions as that of plank's constant? (A) Moment of inertia (B)…
14 Dual Nature of Radiation and Matter Multiple Choice Questions 1. The de-Broglie wavelength of 1mg grain of sand blown by a wind at the speed of 20 m/s is…
13 AC Circuits Multiple Choice Questions 1., In the purely resistive A.C. circuit (A) current leads e.m.f. by a phase angle of radians. (B) current leads e.m.f. by a phase…
12. Electromagnetic Induction Multiple Choice Questions 1. Henry is equivalent to …………………..(A) ampere / second(B) ampere second(C) (D) ohm second Ans. (D) ohm second 2. A transformer converts AC to…
10 Magnetic Fields due to Electric Current Multiple Choice Questions 1. Speed of an electron passing undeviated through a region of cross electric and magnetic field of magnitude and respectively…
11 Magnetic Materials Multiple Choice Questions 1. If a watch-glass containing a small quantity of water is placed on two dissimilar magnetic poles, then water (A) shows a depression in…
09 Current Electricity Multiple Choice Questions 1. In order to convert a moving coil galvanometer into a voltmeter ……………….. (A) a high resistance is connected in parallel with the galvanometer…
08 Electrostatics Multiple Choice Questions 1. Condenser is a device used to store…………………… (A) large charge at low potential (B) large charge at high potential (C) large charge at low…
05 Oscillations Multiple Choice Questions 1. The total work done by a restoring force in simple harmonic motion of amplitude and angular speed , in one oscillation is (A) (B)…