Question

Current through a metallic conductor is tripled while its resistance and the time are held constants. Under these conditions, the heat generated in the conductor will increase by a factor of
a) Three
b) nine
c) Six
d) twelve
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Answer 1

Answer:

Current in the conductor is tripled i.e. I' = 3I

As we know that,

H = i²Rt

From this, we can find that Heat generated is directly proportional to the square of current and already given in that Resistance and Time are considered constant.

H ∞ i²

Now, Let the new heat generated = H'

H'/H = (I')²/I²

H'/H = (3I)²/I²

H' = 9H

Hence,

The heat generated will increase by a factor of 9.

Explanation:

Answer 2

Answer:

b) nine

Explanation:

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