The hot resistance of a 240 V filament lamp is 960Ω. Find the current taken by the lamp and its power rating
Question
The hot resistance of a 240 V filament lamp is 960Ω.
Find the current taken by the lamp and its power rating.
Solution
Step 1: Find the Current
We can use Ohm's Law to find the current. Ohm's Law states that the current (I) is equal to the voltage (V) divided by the resistance (R).
So, I = V/R
Given that V = 240V and R = 960Ω, we can substitute these values into the equation:
I = 240V / 960Ω = 0.25A
So, the current taken by the lamp is 0.25A.
Step 2: Find the Power Rating
The power (P) can be found using the formula P = IV, where I is the current and V is the voltage.
Substituting the given values, we get:
P = 0.25A * 240V = 60W
So, the power rating of the lamp is 60W.
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