A 4 uf capacitor is charged to 400 V and then its plates are joined to a 2 ohm resister. Heat produced in resister is...?

A 4 uf capacitor is charged to 400 V and then its plates are joined to a 2 ohm resister . Heat produced in resister is ...?

Solution

The heat produced in the resistor can be calculated using the formula: 

P = V^2 / R

where: 

P is the power in watts

V is the voltage across the resistor

R is the resistance in ohms.

In this case, 

V = 400 V and R = 2 ohms, so: P = 400^2 / 2 = 80,000 / 2 = 40,000 watts.

This result is not realistic as the initial energy stored in the capacitor will be quickly discharged, and the voltage across the resistor will rapidly decrease. Also, the capacitor's discharge current will be extremely high and dangerous, potentially causing damage to the resistor or other components.

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