Question

expression for joule law​

Answer 1

Answer:

Hope it helps you.

Explanation:

A quantitative form of Joule's law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I2R. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.

Answer 2

Explanation:

✔✔➪➪➪The amount of work done when an electric charges, move against a potential difference which is denoted by V is given by;

W=V x Q …….. (1)

From the above expression,

V=W/Q

We know that,

V=IR …….. (2)

Q=It……… (3)

Therefore,

I=Q/t

Let us substitute (2) and (3) in (1) we get,

W=(IR)(It)

W=H

Where H is the amount of heat produced, it is expressed in Joules J and I is expressed in terms of Ampere.

Therefore,H =l^2RT✔✔✔➪✞✞✞✞