Compare the power used in the 2 Ω resistor in each of the following circuits| 6 V battery in series
(i) Potential difference, V = 6 V 1 Ω and 2 Ω resistors are connected in series. Therefore, equivalent resistance of the circuit, R = 1 + 2 =According to Ohm’s law, V = IR Where, I is the current through the circuit 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 2 Ω 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 Ω and 2 Ω resistors are connected in parallel. The voltage across each component of a parallel circuit remains the same. Hence, the voltage across 2 Ω resistor will be 4 V. Power consumed by 2 Ω resistor is given by Therefore, the power used by 2 Ω resistor is 8w THIS VIDEO HAS EXPLANATION
(i) Potential difference, V = 6 V 1 Ω and 2 Ω resistors are connected in series. Therefore, equivalent resistance of the circuit, R = 1 + 2 =According to Ohm’s law, V = IR Where, I is the current through the circuit 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 2 Ω 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 Ω and 2 Ω resistors are connected in parallel. The voltage across each component of a parallel circuit remains the same. Hence, the voltage across 2 Ω resistor will be 4 V. Power consumed by 2 Ω resistor is given by Therefore, the power used by 2 Ω resistor is 8w THIS VIDEO HAS EXPLANATION