What is the independent variable in the I-V Characteristics practical?

Voltage across the circuit component being measured

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What is the dependent variable in the I-V Characteristics practical?

Current flowing through the circuit component being measured

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What is a control variable in the I-V Characteristics practical?

Temperature of the circuit

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What equipment is used in the I-V Characteristics practical for a resistor?

  1. Power supply
  2. Voltmeter
  3. Ammeter
  4. Resistor
  5. Variable resistor
  6. Connecting leads

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How is the circuit set up in the I-V Characteristics practical for a filament lamp?

The filament lamp is connected in series with an ammeter, a variable resistor and the power supply. The voltmeter is connected in parallel across the filament lamp.

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How is the voltage varied across the component in the I-V Characteristics practical?

By adjusting the variable resistor in regular intervals.

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Why are the power supply connections reversed in the I-V Characteristics practical?

To allow negative voltages to be measured.

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What does a non-linear I-V graph indicate about a component?

That the resistance is not constant.

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