Question

200 J of heat is produced in one second from a resistor of resistance 8 ohm. Find the potential difference across the resistor and its power​

Answer 1

Answer:

P = V²/R

∴ 200 = V²/ 8            ⇒V² = 1600        ⇒ V = 40 (v)

Explanation:

Answer 2

Given

200 J is produced in 1 sec

and resistor of 8 Ohm

To find

The potential difference across the resistor and its power

Solution

We can simply solve this mathematical problem by using the following mathematical process.

The produced heat is given as,

⇒ Power = (Voltage)²÷Resistance

⇒ 200 J × 1 sec = (Voltage)²÷8 Ω

⇒ (Voltage)² = 200 W × 8 Ω

⇒ Voltage = √1600

⇒ Voltage= 40 V  

Hence, the potential difference across the resistor is 40 V