1000+ Work, Power, Energy MCQ Questions and Answers Pdf - 2

Question: 6

What is immaterial for a fuse?

(A) its length

(B) its radius

(C) its resistivity

(D) none of the above

Question: 7

The electric lamps 40 W, 220 V each are connected in series across 220 V. The power consumed by the combination is

(A) 20 W

(B) 40 W

(C) 80 W

(D) 160 W

Question: 8

The heater element in an electric iron is made of

(A) constantan

(B) tungsten

(C) iron

(D) nichrome

Question: 9

Two electrical appliances are connected in parallel to a constant voltage supply. If current in one appliance is less than the second appliance by 1%, then power of the first alliance will be less by

(A) 1%

(B) 2%

(C) 4%

(D) 5%

Question: 10

A kilowatt hour is the unit of

(A) electric current

(B) electric charge

(C) power

(D) energy