# Potential Difference Voltage Potential Difference Potential difference or

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Potential Difference (Voltage)

Potential Difference Potential difference, or voltage, is the difference in electric potential energy per unit of charge measured at two points. The symbol for potential difference or voltage is V. The units of potential difference or voltage is volts (V).

Potential Difference can be compared to the flow of water from water towers. From which tap will the water exit with the greatest force? Why?

Potential Difference can be compared to the flow of water from water towers. From which tap will the water exit with the least force? Why?

Another Potential Difference Analogy

How to use a VOLTMETERS are used to measure the potential difference / voltage in a _____________ circuit.

How to use a VOLTMETER Example: V 0 We want to measure the voltage at V 0 and V 1 for the circuit below. V 1 V 0 is the voltage across the power source. V 1 is the voltage across the bulb.

How to use a VOLTMETER To measure the voltage at V 0 and V 1, the circuit is NOT disconnected ___________. parallel The voltmeter is connected in ______.

How to use a VOLTMETER Connect the positive / red terminal of the voltmeter to the wire(s) leading to the positive / red __________terminal of the power source.

How to use a VOLTMETER Connect the negative / black terminal of the voltmeter to the wire(s) leading to the negative / black __________terminal of the power source.

How to use a VOLTMETER To measure V 0 :

How to use a VOLTMETER To measure V 0 :

How to use a VOLTMETER To measure V 1 :

How to use a VOLTMETER To measure V 1 :

How to Read a VOLTMETER

How to Read a VOLTMETER What is the reading on this voltmeter?

How to Read a VOLTMETER What is the reading on this voltmeter? If you connected the circuit to the 3 V setting on the voltmeter, then the voltage reading is 1. 5 V. If you connected the circuit to the 1 V setting on the voltmeter, then the voltage reading is 0. 5 V.

Current & Voltage in the Home film