Question

When a 6 volts battery is connected across a resistor, the current is 2 Amps. Calculate
a) resistance
b) the power output
c) the power output if the current doubles (the resistance remains same)

Answer 1

Answer:

a) 3 ohm

b) 12 W

c) 48 W

Explanation:

V = 6V

I = 2A

a) R = ${V} / {I}$

= ${6} / {2}$

= 3 ohm

b) Power = $R {I} ^ {2}$

= $3 * {2} ^ {2}$

= 12 W

c) When current is doubles ---> I = 4A

Power = $R {I} ^ {2}$

= $3 * {4} ^ {2}$

= 48 W