A series LRC circuit has a sinusoidal voltage supplied to it at 197 kHz with a p

Question

A series LRC circuit has a sinusoidal voltage supplied to it at 197 kHz with a peak voltage of 270 V, a 41-k Ohm resistance, a 14-mu F capacitor, and a 63-H inductance. What is the peak current for this circuit? a) 3.5 mu A b) 2.3 mu A c) 4.2 mu A d) 6.6 mu A In a transformer, how many turns are necessary in a 110-V primary if the 24-V secondary has 100 turns? a) 458 b) 240 c) 110 d) 22 e) 4 A planar electromagnetic wave is propagating in the +x direction. At a certain point P and at a given instant, the electric field of the wave is given by E = (0.082 V/m)f. What is the magnetic vector of the wave at the point P at that instant? a) 0.27 nT k b. -0.27 nT k c. 0.27 nT j d) 6.8 nT k e) -6.8 nT j

Explanation / Answer

Q11) -

In RLC circuit, the peak current always occurs on Resonance.

and at resonance Znet = R ( because XL = Xc)

Then Peak current = V / Z

= 270 / (41 * 103)

= 6.59 mA

Q12) - As we know that transformation ratio is-

N1/N2 = V1/V2

Then, N1/100 = 110/24

N1 = 458 turns

Thank you !!! Have fun

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