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Current Electricity Video Lecture | Physics for GCSE/IGCSE - Year 11

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FAQs on Current Electricity Video Lecture - Physics for GCSE/IGCSE - Year 11

1. What is the difference between AC and DC current?
Ans. Alternating Current (AC) flows in one direction and then reverses, while Direct Current (DC) flows consistently in one direction only.
2. How is current measured in a circuit?
Ans. Current is measured in a circuit using an ammeter, which is placed in series with the component or load being measured.
3. What is Ohm's Law and how is it used in current electricity?
Ans. Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance. It is used to calculate current, voltage, and resistance in a circuit.
4. How does a circuit breaker work to protect against overcurrent?
Ans. A circuit breaker works by automatically interrupting the flow of current in a circuit when it detects an overcurrent condition, thus preventing damage to the circuit and devices connected to it.
5. What are some common sources of electrical resistance in a circuit?
Ans. Some common sources of electrical resistance in a circuit include wires, connectors, switches, and the components themselves.
127 videos|148 docs|35 tests
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