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Preview questions
1. What is the unit of electric current?
Volt · Ohm · Ampere · Watt
2. Which of the following materials is a good conductor of electricity?
Rubber · Copper · Glass · Wood
3. What is the effect of increasing the resistance in a circuit with constant voltage?
Increases current · Decreases current · No effect · Increases voltage
4. What is the formula for calculating electrical power?
P = IV · P = I/R · P = V/R · P = VR
5. Which instrument is used to measure electric current?
Voltmeter · Ammeter · Ohmmeter · Galvanometer
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