Question

When a current of 4.0A passes through a certain resistor for 10 minutes,2.88X10^4 J of heat are produced. CALCULATE: 1:the power of the resistor 2:the voltage across the resistor plzzzzzzz answer fast.

Answer 1

power= 48watt
voltage=12volts

Answer 2

Answer:

1. Power of resistor = 288 watt.

2. Voltage across resistor = 72 V

Explanation:

Given: I = 4.0 A, t = 10 minutes, H = $2.88 \times 10^{4}$ J

P = ?, V = ?

T=10min = 600sec

I = 4A

H = $2.88 \times 10^{4}$ J

$\bold{\mathrm{H}=\mathrm{I}^{2} \mathrm{Rt}}$

R = $2.88 \times 10^{4}$/4×4×600

R = 18 ohm

$\bold{P=I^{2} R}$

= 4×4×18

=288 watt

V = IR

=18×4

=72V

Therefore, the power of the resistor is 288 Watt and the voltage across the resistor is 72 V.