What is voltage?
Voltage is a measure of the amount of energy supplied to the free electrons by a source of electricity such as electric cells.
What is voltage also related to?
Voltage is also related to the “electrical push” that makes free electrons flow in a circuit.
What can we use to measure voltage?
A voltmeter.
What is the unit of voltage?
Volt ( V ).
In a voltmeter, the positive terminal is ___ and the negative terminal is _____.
red, black
Does a larger size of battery mean a larger voltage?
No.
What experiment can be carried out to support your answer in Q6?
We can use a voltmeter to measure the voltage of five different electric cells and compare the results.
When can a voltage be higher than that of one cell? What does this show?
When several electric cells are connected end-to-end in the same direction. the voltage across them is higher than that of one electric cell. This shows that the total voltage across the connected cells is the sum of the voltages of all the electric cells.
Form a conclusion of an experiment where a certain amount of electric cells are connected to a light bulb in a circuit to test how voltage affects the current.
When more electric cells are connected to increase the voltage, the current in the circuit increases and the light bulb becomes brighter.
Does a higher voltage mean a larger current?
Yes.
