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Manipal MET2012PhysicsAlternating Current

A 220 V main supply is connected to a resistance of 100 k . The effective current is

Options

  1. A2.2 mA
  2. B2.2 2 ~mA
  3. C2.2 2 ~mA
  4. DNone of these

Correct answer

A. 2.2 mA

Step-by-step solution

Effective current is the rms value. Here, 220 V is the labelled value of AC which is also the rms value. Hence, aligned & I_ rms = E_ rms R & I_ rms = 220 100 10^3 & I_ rms =2.2 ~mA aligned

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