NEET Physics Alternating Current Questions Solved


In the circuit shown below, the ac source has voltage V=20cos(ωt) volts with ω = 2000 rad/sec. the amplitude of the current will be nearest to 

(1) 2A

(2) 3.3 A

(3) 2/5A

(4) 5A

(1) R=6+4=10Ω

XL=ωL=2000×5×103=10Ω

XC=1ωC=12000×50×106=10Ω

  Z=R2+(XLXC)2=10Ω

Amplitude of current =i0=V0Z=2010=2A

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