Warm Up Voltage, Resistance, Circuits

Calculate the potential difference across a circuit component if the current flowing through it is 4 Amperes and its resistance is 2 Ohms.

• 2 Volts

• 6 Volts

• 8 Volts

• 12 Volts

A 24 Volt battery produces a current of 8 Amperes. What is the resistance in the circuit?

• 2 Ohms

• 3 Ohms

• 4 Ohms

• 6 Ohms

For a component where resistance remains constant, how does current change as potential difference increases?

• Current decreases proportionally

• Current increases proportionally

• Current remains constant

• Current increases exponentially

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What happens to the resistance of a filament lamp as the current flowing through it increases?

• Resistance decreases

• Resistance stays constant

• Resistance increases

• Resistance first decreases then increases