1000+ Work, Power, Energy MCQ Questions and Answers Pdf - 1

Question: 1

Appliances based on heating effect of current work on

(A) a.c. only

(B) d.c. only

(C) both d.c. and a.c.

(D) none of the above

Question: 2

Lamps used for house lighting are connected in

(A) arbitrary manner

(B) mixed grouping

(C) series

(D) parallel

Question: 3

A constant voltage is applied across the ends of a conductor. The heat produced is

(A) directly proportional to square of length

(B) inversely proportional to length

(C) directly proportional to length

(D) none of above

Question: 4

The power rating of a motor drawing a current of 40 A at 400 V is

(A) 0.1 W

(B) 10 W

(C) 400 W

(D) 16000 W

Question: 5

A fuse wire is made of

(A) nichrome

(B) lead tin alloy

(C) tungsten

(D) copper