2.9 and 2.11 IV Characteristics, LDRs and Thermistors

Which graph represents the component with the lowest resistance?

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When the voltage across a wire is 3 V, the current flowing through it is 6 A. What is the current flowing when the voltage is increased to 9 V?

• 1 A

• 3 A

• 9 A

• 18 A

Which graph shows the I-V characteristics of a filament lamp?

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An LDR has a resistance of 6 Ω. The surroundings become brighter. What is the new resistance of the LDR?

• 3 Ω

• 6 Ω

• 9 Ω

• 12 Ω

What happens to the resistance of thermistor when the surroundings get colder?

• Nothing

• Resistance increases

• Resistance decreases