Question

.200J of heat is produced each second in a 2Ω resistor. The potential difference
across the resistor is

Answer 1

Answer:

Explanation: heat per sec is power

        we know P =V²/R

          then 200 = V²/2

                   u get V = 20 v

                  hop u get it mate............................

Answer 2

Answer:

20 Volts

Explanation:

Given:

• Heat produced each second = 200 Joules

• Resistance of the resistor = 2 ohms
• Time taken = 1 second

To find:

• Voltage (potential difference across the resistor)

Heat = i²rt

200 = i²×2×1

200 = i²×2

i²=$\frac{200}{2}$

i²=100

i=√100

i=10 A

Now using ohms law which says:

V=IR

V=10×2

V=20 Volts

The potential difference across the resistor is equal to 20 Volts