Question

A $4\mu F$ conductor is charged $50$ volts and then its plates are joined through a resistance of $1k\Omega$. The heat produced in the resistance is

• A. 0.5 mJ
• B. 5 mJ
• C. 8 mJ
• D. 10 mJ

Answer 1

Answer: (B)

5 mJ

The energy stored in the capacitor $=\frac{1}{2}C{V}^2=\frac{1}{2}\times 4\times {10}^{-6}\times {50}^2=5\times {10}^{-3}J=5mJ$