Compare the power used into Om’s resistor in each of the following circuits
1. A 6V battery Series with one om and two om resistor is and
2. A 4V. Battery in parallel with 12 om and two ohm resistors.
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Compare the power used into Om’s resistor in each of the following circuits
1. A 6V battery Series with one om and two om resistor is and
2. A 4V. Battery in parallel with 12 om and two ohm resistors.
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Answer:
(i) Potential difference, V = 6 V
1Ohm and 2 Ohm resistors are connected in series. Therefore, equivalent resistance of the circuit, R = 1 + 2 = 3 Ohm
According to Ohm’s law,
V = IR
Where,
I is the current through the circuit
I= 6/3 = 2 A
This current will flow through each component of the circuit because there is no division of current in series circuits. Hence, current flowing through the 2Ohm resistor is 2 A. Power is given by the expression,
P= (I)2R = (2)2 x 2 = 8 W
(ii) Potential difference, V = 4 V
12 Ohm and 2 Ohm resistors are connected in parallel. The voltage across each component of a parallel circuit remains the same. Hence, the voltage across 2 Ohm resistor will be 4 V.
Power consumed by 2 Ohm resistor is given by
P= V2/R = 42/2 = 8 W
Therefore, the power used by 2 Ohm resistor is 8 W
Explanation:
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