What does an ammeter measure and what are its units?
An ammeter measures electric current.
Current is measured in amperes (amps or A for short).
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How is an ammeter connected in a circuit to measure current?
An ammeter is connected in series in a circuit to measure the current flowing through the circuit.
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What does a voltmeter measure and what are its units?
A voltmeter measures potential difference (voltage) across a component in a circuit.
Potential difference is measured in volts (V).
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How do you calculate resistance in a circuit?
R=IV
Where:
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What is the difference between conductors and insulators in terms of resistance?
Good conductors like metals have low resistance, allowing current to flow readily.
Insulators like wood have high resistance, impeding the flow of charges.
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