Current in a circuit

Question

Answer 1

(1)

Step 1:

Observe the circuit:

The resistors and are in parallel.

Resultant resistance is .

Above resultant resistance is in series with .

Thus, total resistance of the circuit is .

.

Find the current passing through the circuit.

.

Solution:

Total current in the circuit .

Answer 2

(2)

Step 1:

Find the voltage drop across the resistance .

.

.

Voltage drop across the resistors and is same since they are in parallel.

Find the current flowing though the resistor .

.

Solution:

Current flowing though the resistor  is .

Answer 3

(3)

Step 1:

Find the current flowing through the resistor .

.

Solution:

Current flowing through the resistor  is .