Jason is investigating the resistance in a test wire using the circuit below. He is using a voltmeter to measure the potential difference across... what?

n which circuit does the voltmeter read the potential difference across the lamp?*2 points

Potential difference is measured in...

Resistance is equal to the potential difference divided by what? Give the name, not the unit of measurement.

A cell of emf 90 V is connected across series combination of two resistors each of 100 Ω resistance. A voltmeter of resistance 400 Ω is used to measure the potential difference across one of the given resistors. The reading of the voltmeter will be:

The diagram shows an electric circuit with two resistors, P and Q. Some of the values of thecurrent are also shown.i) On the diagram draw a voltmeter to measure the potential difference of resistor QRemember: Voltmeters are always attached in parallel to the componentThe voltmeter is drawn in redii) Deduce the readings on the ammetersRemember: Current is conserved at a junction: current in = current out0.80A enter the junction, and 0.30A go through resistor PReading at A1 = 0.80 - 0.30= 0.50 AReading at A2 = same as current entering junction= 0.80A