Question

Calculate the current of the circuit, if a resistor of value 4ω is connected in series with the bulbs. resistance 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 of the circuit can be calculated using Ohm's Law, which states that the potential difference (V) across a resistor is equal to the current (I) multiplied by the resistance (R). In this case, using the equation I = V / R, the current is calculated to be 1.43A.

Step-by-step explanation:

To calculate the current of the circuit, we can use Ohm's Law, which states that the potential difference (V) across a resistor is equal to the current (I) multiplied by the resistance (R). In this case, the resistor value connected in series with the bulbs is 4Ω. The potential difference from the cell is 28 volts. The initial resistance of the circuit without the resistor is 15.6Ω.

The equation for potential difference is given as V = I * R. We can rearrange this equation to solve for I, which gives us I = V / R.

Applying this equation, we have I = 28V / (15.6Ω + 4Ω) = 28V / 19.6Ω = 1.43A.

Therefore, the current of the circuit is 1.43A.