Question

Draw a schematic diagram of an electric circuit consisting of battery of five 2V cells, a 20 Ω resistor, a 30 Ω resistor, a plug key, all connected in series. Calculate the value of current flowing through the 20 Ω resistor and the power consumed by the 30 Ω resistor.

Answer 1

Answer:

Current Flowing Through 20Ω resistor

I = V/R

I = 10/20

Hence the current flowing is 0.5 Ampere.

Power consumed by the 30 Ω resistor

Power = Voltage × current.

Given Voltage = 10V; current = 0.5

⇒ Power = 10 × 0.5 = 5W

Hence power consumed by 30 Ω resistor is 5W.

Answer 2

Current = 0.5 A; Power consumed by 30 Ω resistor is 5W.

Explanation:

Given: Current flowing through 20 Ω resistor and 30 Ω resistor.

To find: Value of current and power consumed by resistor.

Please refer to the attached picture for the schematic diagram.

Potential difference = 30 - 20 = 10 V

Current flowing through the 20 Ω resistor can be calculated using the formula:

I = V / R

I = 10 / 20 = 0.5

So the current flowing it is 0.5 Ampere.

Power consumed by the 30 Ω resistor

Power = Voltage × current.

Power = 10 × 0.5 = 5W

Power consumed by 30 Ω resistor is 5W.