Year: 2016
Topic: Current electricity
Time :
1.
The charge flowing through a resistance R varies with time t as \(\text{Q}\, =\, at − bt^2\), where a and b are positive constants. The total heat produced in R is
(1). \(\displaystyle \frac{a^3R}{2b}\)
(2). \(\displaystyle \frac{a^3R}{b}\)
(3). \(\displaystyle \frac{a^3R}{6b}\)
(4). \(\displaystyle \frac{a^3R}{3b}\)