Question
Download Solution PDFA light bulb working on a 18 V battery draws a current of 3 A. What will be the resistance of the bulb?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 6 Ω.
Key Points
We can use Ohm's law to calculate the resistance of the bulb:
Ohm's law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points, and inversely proportional to the resistance (R) between them:
I = V / R
R = V / I
Where:
R = resistance in ohms (Ω)
V = voltage in volts (V)
I = current in amperes (A)
Given that the voltage (V) is 18 V and the current (I) is 3 A, we can substitute these values into the equation to find the resistance (R):
R = V / I
⇒ 18 V / 3 A = 6 Ω
Therefore, the resistance of the bulb is 6 ohms (Ω).
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