Entry Test MCQ :: Current Electricity

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11.

An immersion heater of 400 watts kept on for 5 hours will consume electrical power of

A.	2KWh	B.	20KWh
C.	6KWh	D.	12KWh

12.

Resistance of a super conductor is

A.	finite	B.	infinite
C.	zero	D.	changes with every conductor

13.

Resistance of an ideal insulator is

A.	infinite	B.	zero
C.	finite	D.	depends upon nature

14.

Which one is the best material for making connecting wires?

A.	iron	B.	tungsten
C.	silver	D.	copper

15.

Reciprocal of resistivity is called

A.	resistance	B.	inductance
C.	conductivity	D.	flexibility

16.

When 2? 4? and 6? resistor are connected in parallel their resultant equivalent resistance will be

A.	12?	B.	11/12?
C.	12/11?	D.	data is insufficient

17.

Circuit which gives continuously varying potential is called

A.	complex network	B.	wheat stone bridge
C.	potential divider	D.	all of above

18.

Internal resistance is the resistance offered by

A.	source of e m f	B.	conductor
C.	resistor	D.	capacitor

19.

There are three bulbs of 60W 100W and 200W which bulb has thickest filament.

A.	100W	B.	200W
C.	60W	D.	all

20.

Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains?

A.	40 W bulb	B.	60 W blub
C.	100 W blub	D.	all will burn equally brightly