1. There is no difference in the brightness of the bulbs.
2. The more the number of bulbs arranged in parallel in a circuit, the same is the brightness of the bulb
3. The lights that light up the rooms in our houses.
Sunday, August 30, 2020
Notes - Electricity
To calculate electrical energy passing through a bulb, use the following ratio;-
1. For bulbs in series,
Number of Batteries ÷ Number of bulbs
2. For bulbs in parallel,
Number of Batteries
3. For batteries in parallel,
number of batteries = number of batteries present in 1 ‘row’
Thursday, August 27, 2020
Notes - Electricity Calculation - Ba/Bu
To find out electrical energy passing through a bulb, use the following guide;-
For bulbs in series,
Number of Batteries ÷ Number of bulbs
For bulbs in parallel,
Number of Batteries
For batteries in parallel,
Number of batteries = number of batteries present in 1 ‘row’
Notes - Electricity p4 -p6
Pg 4 Activity 1
Common factors
1. Positive and negative terminal of battery must be connected
2. There should not be any gap(s) in the circuit
3. The metal casing and metal tip must be connected to the circuit
4. All parts of the circuit must be made of conductors of electricity
1. circuit
2. bulb/battery/wire
3. tip/casing
4. negative/positive
5. current
6. closed
Pg 5
Bulb in B lights brighter than Bulb in A
The more the batteries, the brighter the bulb.
A battery is the source of electrical energy in a circuit so the more the battery, the more the electrical energy is converted to light energy.
The bulb may fuse (filament in the bulb will break/melt)
toys (eg remote control car) and torchlight
Pg 6
A lights up the brightest and C is the least bright (dimmest)
The more the bulbs arranged in series, the less bright (dimmer) is the bulb
Sunday, August 23, 2020
Thursday, August 20, 2020
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