Question

. A 4 ohm resistor having 3 A current will dissipate the power of

Answer 1

A 4-ohm resistor having a 3 A current will dissipate the power of 36 watts.

What do you know about power?

• The amount of energy that is converted during one unit of time is called power.
• The formula of power in terms of current and resistance is P = I^2R
• Now calculate the power after inserting the values in the above formula.
• P = (3)^2 x 4 = 9 x 4 = 36 watts.
• The unit of power is 'watts'.
• However, in SI units, the power is measured in joules per second.
• I.e P = W/t
• Work is measured in joules and time in seconds.
• So, P = Joules/ seconds

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