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
Ans: C
both d.c. and a.c.
Question: 2
Lamps used for house lighting are connected in
(A) arbitrary manner
(B) mixed grouping
(C) series
(D) parallel
Ans: 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
Ans: B
inversely proportional to length
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
Ans: D
16000 W
Question: 5
A fuse wire is made of
(A) nichrome
(B) lead tin alloy
(C) tungsten
(D) copper
Ans: B
lead tin alloy
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