What is the resistance of a circuit with voltage 40 V and current 8 A?
32 ohm
10 ohm
What is the (a) highest (b) lowest total resistance, that can be secured by combinations of four coils of resistances 4 ohms, 8 ohms, 12 ohms and 24 ohms?
If R1=10 ohms,R2=40 ohms,R3=30 ohms,R4=20 ohms,R5=60 and a 12 volt battery is connected to the arrangement.Calculate:
(a)the total resistance in the circuit, and
(b)the tootal current flowing inthe circuit.