Physics- Measurement Of Current And Potential Differnece

Question 1

Potential difference in a circuit is

Answer 1

A measure of the difference in electrical potential energy between two points in a circuit
Measured in volts using a voltmeter (V)

Question 2

Current is measured

Answer 2

In Amps (A) using an ammeter

Question 3

Ammeter

Answer 3

Measures the total current that flows in a circuit.
It must be connected in series so that all the charge flows through it.
It must have very low resistance so that it doesn’t add to the resistance of a circuit.
Red connector must be connected to the positive Pole of a battery and black to the negative Pole.
Three ampere ranges on an ammeter. Select the range that will suit the current that flows in the circuit

Question 4

Voltmeter

Answer 4

Measures the potential difference between two point in volts.
Current doesn’t flow through the meter
Has a very high resistance
Always connected in parallel to the component/s of which the potential difference is measured
If connected in parallel to a battery, it will show the total available energy of battery (between positive and negative pole)
Red connector must be connected to point that leads to the positive pole of the battery and the black to the negative