CBSE Class 10 Answered
Three resistors of 10, 20 and 30 ohms are connected in parallel to a 9V battery. Calculate: (
a)Value of current through each resistor
(b)Total current in the circuit
(c)Total effective resistance of the circui
Asked by piyushmalik024 | 19 May, 2019, 11:31: AM
Expert Answer
a) Current through each resistor:
For parallel combination of resistor, potential difference across each resistor is same.
Current through 10 Ω resistor is,
V = IR
V= 9V
R =10 Ω
Thus, I1 = 9/10 = 0.9 A
Current through 20 Ω resistor,
I2 = 9/20 = 0.45 A
Current through 30 Ω resistor is,
I3 = 9/30 = 0.3 A
b) Total current in the circuit is,
I = I1+ I2 + I3 = 0.9 + 0.3 + 0.45 = 1.65 A
Thus, total current flowing through the circuit is 1.65 A.
c) Effective resistance:
The resistors are connected in parallel,
Thus,
Thus, the effective resistance of the circuit is 5.45 Ω
Answered by Shiwani Sawant | 19 May, 2019, 03:03: PM
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