Question

Calculate the current and the resistance of a
100W, 200V electric bulb in an electric circuit.​

Answer 1

Before, finding the answer. Let's find out how we can find the answer.

• In this question, we are asked to find the current and the resistance of the electric bulb.

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Given :

• Power = 100W
• Voltage = 200V

To find :

• the current and the resistance

Solution :

• To find the Current, we have to first find the Resistance.
• Let's find the Resistance, by using Ohm's law.

$\sf Resistance = \dfrac{V^2}{P}$

                $\sf = \dfrac{200^2}{100}$

                $\sf = \dfrac{200 \times 200}{100}$

                $\sf = \dfrac{40000}{100}$

                $\sf = \dfrac{400 \not0 \not 0}{1 \not0 \not0}$

                $\sf = \dfrac{400}{1}$

                $\sf = 400$

Therefore, the Resistance is 400 ohms.

• Now, let's find the Current.

Here,

• I = Current
• V = Voltage
• R = Resistance

$\sf I = \dfrac{V}{R}$

 $\sf = \dfrac{200}{400}$

 $\sf = \dfrac{2 \not0 \not 0}{4 \not 0 \not 0}$

 $\sf = \dfrac{2}{4 }$

 $\sf = 0.5$

Therefore, the Current is 0.5 A.

Answer 2

Answer:

the current is 0.5A..

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