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Last Updated On [03-11-2023]

An electric kettle boils some water in 16 min. Due to some defect, it becomes necessary to remove 10% turns of heating coil of the kettle. Now, how much time will it take to boil the same of water?

a)

17.7 min

b)

14.4 min

c)

20.9 min

d)

13.7 min


Question ID - 151705 :-

An electric kettle boils some water in 16 min. Due to some defect, it becomes necessary to remove 10% turns of heating coil of the kettle. Now, how much time will it take to boil the same of water?

a)

17.7 min

b)

14.4 min

c)

20.9 min

d)

13.7 min

1 Answer
5876 Votes
3537

Answer Key : (b) -

(b)

We know,

Let,  initial number of turns

 resistance of the coil

 Constant

14.4 min.



Next Question :

A rod of a certain metal is 1.0 m long and 0.6 cm in diameter. Its resistance is  Another disc made of the same metal is 2.0 cm in diameter and 1.0 mm thick. What is the resistance between the round faces of the disc?

a)

b)

c)

d)


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