Resistors

Req  =  R1 + R2  =  10 + 4.7  =  14.7kΩ

(1 ÷ Req)  =  (1 ÷ R1)  +  (1 ÷ R2)  +  (1 ÷ R3)

=  (1 ÷ 120)  +  (1 ÷ 120)  +  (1 ÷ 60)

=  (4 ÷ 120)    =    (1 ÷ 30)

Therefore total resistance Req  =  30Ω

Course Guide Topics

1. Current
2. DC & AC Current
3. Voltage
4. Resistance
5. Ohm’s Law
6. Power (1)
7. Power (2)
8. Electrical Units
9. Resistors (1)
10. Resistors (2)
11. Resistors (3)
12. Resistor Question (1)
13. Resistor Question (2)
14. Resistor
15. Tolerance (1)
16. Tolerance (2)
17. Conductivity
18. Semiconductors