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Charging a Capacitor and Constant Current

In order to charge a capacitor at constant current a variable resistor is placed in the circuit to keep the current constant. The charge on the Capacitor is Q = It where Q is charge in coulombs, t is time in seconds and I is current in amps.The potential difference across the capacitor can be measured with a voltmeter.

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Specification: OCR Physics A (H556), A-level, 6.1.3 Charging and discharging capacitors and 6.1.1 Capacitors. Topic: Capacitors.

Key terms in this lesson

magnetic field
A region of space in which a moving charge, current-carrying conductor or magnetic material experiences a force.
motor effect
The force produced on a current-carrying conductor placed in an external magnetic field.

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