1. If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be
(a) 100 %
(b) 200 %
(c) 300 %
(d) 400 %

Question

1.	If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be
(a)	100 %
(b)	200 %
(c)	300 %
(d)	400 %

MyClass24 · Accepted Answer

Soln:
Answer is (c) 300 %
Explanation:
Heat generated by a resistor is directly proportional to square of current. Hence, when current becomes double, dissipation of heat will multiply by 2 =4. This means there will be an increase of 300%.

1. If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be (a) 100 % (b) 200 % (c) 300 % (d) 400 %