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Question

An electric bulb works on 230 V line and draws 0.1 A current. The resistance of the filament is:
  1. 230 Ω
  2. 2300 Ω
  3. 23 Ω
  4. 2.3 Ω

A
2300 Ω
B
23 Ω
C
230 Ω
D
2.3 Ω
Solution
Verified by Toppr

Voltage, V=230 V
Current, I=0.1 A
According to Ohm's law,
V=IR
R=VI

=2300.1
R=2300 Ω

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