How does Electricity make my life easier?
Electricity makes our lives significantly easier. We do not have to walk to a river to get water or wash our clothes and we can cook foods by switching a button. Image what would happen if the electricity supply stopped to your house for 1 week!!!
There are two types of circuits - series and parallel. Lets learn about how these circuits can be used to make our lives even MORE easier!
Series Circuits
* If the globes are arranged one after the other, in a line then the globes are in SERIES. * The same current will flow through each globe but the voltage is shared between each globe * The brighter a globe, the more voltage passing through it * The circuit is broken if any of the globes in a series circuit is removed or 'blows'. The current cannot jump the break and so it cannot reach the other globes. The disadvantage of series circuits is that all components are on or off. If household appliances were connected in series then you would have to turn on everything such as dishwasher, fridge, etc just to watch the TV! |
Parallel Circuits
* When globes are arranged in separate branches ('piggyback') then they are said to be in parallel. * The current splits so that half of the current goes through each branch. * The voltage is the same for each globe as the power supply. * If a globe breaks, then only that branch is broken and the other globe stays alight. |
2) Copy the circuit in question 1 and modify it to include:
a) a switch that turns all the light globes on and off
b) an ammeter that measures the current through globe A
c) a voltmeters that measures the voltage through globe E.
3) Complete these sentences:
a) A globe in a series circuit blows. The other globes will ........
b) Another globe is added in line with the others in a series circuit. The other globes will .......
c) A globes in a parallel circuit blows. The other globes will .........
d) Another globe is added in parallel with the others in a parallel circuit. The other globes will ...........
4) How many 6 volt light globes can operate at full power in a 240 volts series circuit
5) In the circuits shown, all globes are identical and connected to a 6 volt battery. Identify the circuit or circuits in which the globes glow:
a) brightest
b) most dim.
a) a switch that turns all the light globes on and off
b) an ammeter that measures the current through globe A
c) a voltmeters that measures the voltage through globe E.
3) Complete these sentences:
a) A globe in a series circuit blows. The other globes will ........
b) Another globe is added in line with the others in a series circuit. The other globes will .......
c) A globes in a parallel circuit blows. The other globes will .........
d) Another globe is added in parallel with the others in a parallel circuit. The other globes will ...........
4) How many 6 volt light globes can operate at full power in a 240 volts series circuit
5) In the circuits shown, all globes are identical and connected to a 6 volt battery. Identify the circuit or circuits in which the globes glow:
a) brightest
b) most dim.
6) Identify the correct answer from the list below. The current that flows through point A is:
A) the same as the current that flows through point B B) half the size of the current through point B C) twice the size of the current through point B D) three times the size of the current through point B |