Electrical current

Question

Answer 1

(1)

Step 1:

Observe the circuit :

The resistors and are in parallel.

Resultant resistance is .

Total resistance of the circuit is .

Voltage drop across the resistor is same as the voltage across the resistor , since they are in parallel.

Thus, .

Ohm's law: .

Therefore, .

.

.

Voltage applied to the circuit is .

Total current passing through the circuit is .

.

Total current passing through the circuit is 8 A .

Solution:

Total current passing through the circuit is 8 A.

Answer 2

(2)

Step 1:

Total current passing through the circuit is .            (From (1))

Find the current passing throught the resistor .

Current division rule : .

Substitute corresponding values in the above formula.

.

Current passing throught the resistor is .

Solution:

Current passing throught the resistor is .