Question 452: Current Electricity

Question

A resistor develops 300 J of thermal energy in 15 s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10 s is ____________ J.

Accepted Answer

$$300 = {I^2}R 	imes 15$$
$$ \Rightarrow R = 5\,\Omega $$
Now $$I_2^2R{t_2}$$
$$ = 9 	imes 5 	imes 10$$
$$ = 450\,J$$

Current Electricity

A resistor develops 300 J of thermal energy in 15 s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10 s is ____________ J.

Choose the correct answer: