Resistance and Resistors

Resistance opposes the flow of __________.

The unit of resistance is __________.

Select the correct equations.

• Current = Voltage / Resistance

• Voltage = Current / Resistance

• Voltage = Current x Resistance

• Resistance = Voltage / Current

• Current = Resistance / Voltage

Voltmeter V reads 6.0 V and resistor R has a resistance of 4.0 Ω. What is the current through ammeter A?

A current of 15 mA is flowing through a 2.0 Ω resistor. What is the potential difference across the resistor?

In a thermistor, the resistance is high when the __________ is low.

LDR stands for __________.

Explain how a thermistor is used in a fire alarm.

When resistance in a circuit is low, the current flowing is __________.

Select the correct shape for the graph of a thermistor or an LDR.

• 
• 
• 
•