Question

Two resistors R1 = 3 Ω and R2 = 6 Ω are connected
in parallel.



1.What is the total resistance in the circuit?

2.Calculate the main current in the circuit,if the resistors are connected to the power supply 8V.

Answer 1

Answer:

Total resistance is 2 ohms.

Total current is 4 Ampere.

Answer 2

Given: R1 = 3 R2 = 6

To Find:

1. Total resistance - R
2. Current if power supply of 8V connected to the circuit

Solution:

Formula used:

1. Equivalent resistance for resistors connected in parallel - 1/R = 1/R1 + 1/R2
2. Current = voltage - V / total or equivalent resistance of the circuit - R

Applying the above Formula to calculate the equivalent or total resistance:-

1/R = 1/3 + 1/6

1/R = $\frac{2 + 1}{6}$

1/R = 3/6

1/R = 1/2

R = 2

Applying the above Formula to calculate the current in the circuit:-

V = IR

I = V/R

I = 8/2

I = 4A

Hence, the resistance of the circuit = 2 ohms and current in the circuit,if the resistors are connected to the power supply 8V = 4A