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A 100 W bulb is connected to a 220 V supply. What is the current flowing through
A 100 W bulb is connected to a 220 V supply. What is the current flowing through the bulb?
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Practice Questions
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Q1
A 100 W bulb is connected to a 220 V supply. What is the current flowing through the bulb?
0.45 A
1.0 A
2.2 A
2.5 A
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Using the formula P = VI, where P = 100 W and V = 220 V, the current I = P/V = 100/220 ≈ 0.45 A.
Questions & Step-by-step Solutions
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Q
Q: A 100 W bulb is connected to a 220 V supply. What is the current flowing through the bulb?
Solution:
Using the formula P = VI, where P = 100 W and V = 220 V, the current I = P/V = 100/220 ≈ 0.45 A.
Steps: 6
Show Steps
Step 1: Identify the power of the bulb, which is given as 100 W.
Step 2: Identify the voltage of the supply, which is given as 220 V.
Step 3: Use the formula P = VI, where P is power, V is voltage, and I is current.
Step 4: Rearrange the formula to find current I: I = P / V.
Step 5: Substitute the values into the formula: I = 100 W / 220 V.
Step 6: Calculate the current: I ≈ 0.45 A.
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