Basic Electrical Engineering MCQ 4- Job Interview MCQ Questions Answers

Monday, 11 November 2013

Electrical Electronics Engineering Job Interview MCQ Questions Answers 4

 

1.       An electric heater is marked 2000 W,200 V. The resistance of the coil is 20 ohm.
2.       The current in a circuit having constant resistance is tripled. The power increases 9 times.
3.       What voltage drop will be there across a 1 kW electric heater whose resistance when hot is 40 Ohms?  Ans: 200 V
4.       In the case of liquids, ohms law is fully obeyed.
5.       A copper wire has a resistance of 10 ohms. It is stretched by one-tenth of its original length. Then its resistance will be - 12.1 ohms.
6.       No current flows between two charged bodies if they have same potentials.
7.       Best materials for making connecting wires-  copper
8.       The specific resistance of the material of wire depends on the material out of which the wire is made.
9.       Ampere- second is the unit of Charge.
10.   The percentage by which the incandescence of lamp decreases due to drop of current by 3% is-6%.



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