MSBTEPAPER

Q.1. Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This is called (a) electromagnetic induction (b) lenz’s law (c) hysteresis loss (d) kirchhoff’s laws Answer Answer: (a) Q.2. In electromagnetic induction, the induced charge is independent of (a) change of flux (b) time. (c) resistance of the coil (d) None of these Answer Answer: (b) Q.3. An induced e.m.f. is produced when a magnet is plunged into a coil. The strength of the induced e.m.f. is independent of (a) the strength of the magnet (b) number of turns of coil (c) the resistivity of the wire of the coil (d) speed with which the magnet is moved Answer Answer: (c) Q.4. According to Faraday’s law of electromagnetic induction (a) electric field is produced by time varying magnetic flux. (b) magnetic field is produced by time varying electric flux. (c) magnetic field is associated with a moving charge. (d) None of these Answer Answer: (a) Farady’s law states that time varying...

  Basic Electrical Engineering Multiple Choice Questions on “Capacitance and the Capacitor”. 1. Capacitor is a device used to__________ A. store electrical energy B. vary the resistance C. store magnetic energy D. dissipate energy Answer: A Clarification: Capacitor is used to store the charge. It stores electrical energy between the plates. 2. Capacitor stores which type of energy? A. kinetic energy B. vibrational energy C. potential energy D. heat energy Answer: C Clarification: Capacitor store charge in between the plates. This charge is stationary so we can say capacitor store potential energy. 3. Capacitor blocks__________ after long time. A. alternating current B. direct current C. both alternating and direct current D. neither alternating nor direct current Answer: B Clarification: Capacitor blocks direct current at steady state and pass alternating current. 4. Why does capacitor block dc signal at steady state? A. due to high frequency of dc signal B. due to zero frequency o...

  MAGNETIC CIRCUIT Multiple Choice Questions with Answers :- 1. An air gap is usually inserted in magnetic circuits to (a) increase m.m.f. (b) increase the flux (c) prevent saturation (d) none of the above Ans: c 2. The relative permeability of a ferromagnetic material is (a) less than one (b) more than one (c) more than 10 (d) more than 100 or 1000 Ans: d 3. The unit of magnetic flux is (a) henry (b) weber (c) ampereturn/weber (d) ampere/metre Ans: b 4. Permeability in a magnetic circuit corresponds to______ in an electric circuit. (a) resistance (b) resistivity (c) conductivity (d) conductance Ans: c 5. Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it (a) lowers their power efficiency (b) increases their cost of manufacture (c) leads to their increased weight (d) produces fringing Ans: a 6. Relative permeability of vacuum is (a) 1 (b) 1 H/m (c) 1/4JI (d) 4n x 10-‘ H/m Ans: a 7....