Uncharged capacitor is connected in a series with a resistor, switch, and battery . When the switch is closed the potential drop across the resistor:
Correct answer: B. Initially maximum then decrease to zero
- A. Reamain same
- B. Initially maximum then decrease to zero
- C. Become zero then increase maximum
- D. Remain zero
Explanation
During charging of capacitor, maximum current flows through the resistor. As the capacitor charges, the charges build up gradually on its plates then current through the resistor decreases with time. This decrease in current decreases the P.D across the resistor during the charging. Because V = IR
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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