BITSAT2009PhysicsAlternating CurrentActual
A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 ~Hz frequency. If an ac source, of 200 volt, 100 ~Hz , is connected across the coil, the current in the coil will be
Options
- A4.0 ~A
- B8.0 ~A
- C7.2 ~A
- D2.0 ~A
Correct answer
A. 4.0 ~A
Step-by-step solution
If =50 2 then L =20 If ^ =100 2 then ^ L =40 Current flowing in the coil is I = 200 Z = 200 R ²+ ( ^ L )² =4 ~A