Question

How much heat is required to be produced per second if the potential difference across a 5Ω resistor is 25V, and 5A current passing through it?​

Answer 1

Answer :

Given :

• potential difference across a 5Ω resistor is 25V
• 5A current passing through a circuit
• V = 25 V
• I = 5 A
• R = 5 $\omega$
• T = 1 second

To find :

• Heat produced per second

Solution :

We know that Heat = I²Rt

• Heat = $\sf\dfrac{V^2}{R}t$

• Heat = VIt

R stands for resistance , I for current , v for potential difference or voltage and t for time

By using third formula we get ,

• Heat = V × I × T
• Heat = 25 × 5 × 1
• Heat = 125 Joules / second

Answer 2

Explanation :-

We have :-

• → Resistance = 5 Ω
• → Potential difference = 25 V
• → Current = 5 A
• → Time = 1 second

We have two formulae two solve this problem. Here, we will use the formula :-

• H = I²Rt

Where :-

• • H is the heat produced.
• • I is the current.
• • R is the resistance.
• • t is the time.

Substituting values, we get :-

⇒ H = (5)² × 5 × 1

⇒ H = 25 × 5

⇒ H = 125 J