Question

Calculate the current of the circuit, if a resistor of value 4ω is connected in series with the bulbs. potential difference from cell is 28 volts the initial resistance of the circuit without the resistor is 15.6ω. use the following equation: potential difference = current x resistance show your working out and state the unit. give your answer to 2 decimal places.

Answer 1

The current in the circuit with a total resistance of 19.6ω and a potential difference of 28 volts is approximately 1.43 Amperes after applying Ohm's Law.

Step-by-step explanation:

To calculate the current in the circuit when a resistor of 4 ohms (ω) is connected in series with the initial resistance of 15.6ω and a potential difference of 28 volts from the cell, we use Ohm's Law which is given by the equation V = IR, where V is the potential difference, I is the current, and R is the resistance. Given that the resistance adds up when in series, the total resistance in the circuit is Rtotal = 4ω + 15.6ω = 19.6ω. Plugging the values into the formula:

I = V / Rtotal = 28 V / 19.6ω = 1.4286 A

To keep the answer to two decimal places, the current is approximately 1.43 A, and the unit for current is Amperes (A).