Question

*The Joule’s Law of heating is expressed as-* 1️⃣ H=I²Rt 2️⃣ I=V/I 3️⃣ R=V/I 4️⃣ None of these​

Answer 1

Answer:

The Joule's Law of heating is expressed as:

H = $\sf I^2$Rt

where:

I stands for amount of current passing

R stands for resistance of the conductor

t stands for time

Hope it helps

Answer 2

Answer :-

1️⃣ H = I²Rt

Explanation :-

Let us learn to derive this formula.

Here in this process of derivation we have used alphabet to denote a particular parameter.

• ‘W’ is the work done
• ‘V’ is the Potential difference (commonly known as Voltage)
• ‘Q’ is the charge
• ‘I’ is current flowing
• ‘t’ stands for time

We know that:

★ W = V × Q ---- [Equation 1]

The Voltage can be expanded by Ohm's law as:

✿ V = I × R

Similarly, Electric charge can be written as:

✞ Q = I × t

Now, substitute the value of ‘V’ and ‘Q’ in Equation 1.

W = V × Q

⇒ W = (IR) × (It)

⇒ W = I²Rt

In this case Work done = Heat generated.

∴ 【H = I²Rt】