1. Current On your show me boards draw circuit symbols for. 1 LDR
2 Thermistor
3 Diode
4 Variable resistor

2. Voltage
Voltage is the amount of energy transferred (changed) per coulomb of charge.
1 Volt = 1 Joule per coulomb
A voltmeter connected across the component

3. V = E/Q
V=Voltage
E=Energy
Q = Charge E V Q X

4. ☺ ☺ ☺ ☺ ☺ ☺ ☺ ☺ ☺ ☺ ☺ Current I = Q/t
I’m counting how many coulombs of electrons go past me every second ☺ ☺ ☺
The number of Coulombs flowing past a point in the circuit every second.
I = Q/t ☺ ☺ A ☺ ☺ ☺ ☺ ☺ ☺
Can you copy this please?
1 Amp = 1 coulomb per second

5. Q = It
Q=Charge
I=Current
t = time Q t I X

6. Ohm’s Law
V = IR
V=Voltage
I=Current
R = Resistance V R I X

7. Can you copy this please?
Resistance
Measures how difficult it is for current to flow. Measured in Ohms (Ω) ☺ A V
Can you copy this please?
Resistance = voltage/current R = V/I

8. Page

9. Answers Q1. chare, voltage, work, reduces, decrease.
Q2 Current A amps, Resistance Ω ohms, Potential Difference V volts.
Q3 Q=It = 5*20*60=6000C B)

10. Milliamps!
1 A = 1000 mA
1 mA = ?

11. Milliamps!
1 A = 1000 mA
1 mA = A

12. In a series circuit Current is the same at any point in the circuit

13. Can you copy this please?
In a series circuit
Current is the same at any point in the circuit
2.5 A
2.5 A ☺
2.5 A
2.5 A
Can you copy this please?

14. In a parallel circuit
The current splits (total current stays the same)
2.5 A
2.5 A
1.25 A
1.25 A

15. Can you copy this please?
In a parallel circuit
The current splits (total current stays the same)
2.5 A
2.5 A
1.25 A ☺
1.25 A
Can you copy this please?

16. Can you copy this please?
Resistance
Measures how difficult it is for current to flow. Measured in Ohms (Ω) ☺ A V
Can you copy this please?
Resistance = voltage/current R = V/I

17. In a series circuit
The sum of the voltages across the lamps equals the voltage across the cells
9 V
3 V
3 V
3 V

18. Can you copy this please?
In a series circuit
The sum of the voltages across the lamps equals the voltage across the cells
9 V ☺
3 V
3 V
3 V
Can you copy this please?

19. In a parallel circuit
In a simple parallel circuit, voltage across each lamp equals the voltage across the cells
5 V
5 V
5 V

20. Can you copy this please?
In a parallel circuit
In a simple parallel circuit, voltage across each lamp equals the voltage across the cells
5 V
5 V ☺
5 V
Can you copy this please?

21. Resistance
Measures how difficult it is for current to flow. Measured in Ohms (Ω) A V
Resistance = voltage/current R = V/I