NEET Alternating Current MCQs & PYQs

Match the following and choose the correct option from given codes :

An LC oscillator contains inductance L = 1μH and capacitance C = 0.01μF, The wave length of electromagnetic wave generated is nearly :

The figure shows variation of R, XL and XC with frequency f in a series L, C, R circuit. Then for
what frequency point, the circuit is inductive ?

In pure inductive circuit, the curves between frequency f and reciprocal of inductive reactance 1/XL is :

In an LR-circuit, the inductive reactance is equal to the resistance R of the circuit. An emf E = E0 cos (wt) applied to the circuit. The power consumed in the circuit is :

An LCR series circuit with a resistance of 100 ohm is connected to an AC source of 200 V (rms) and angular frequency 300 rad/s. When only the capacitor is removed, the current lags behind the voltage by 60°. When only the inductor is removed the current leads the
voltage by 60°. The average power dissipated is :

In the adjoining A.C. circuit the voltmeter whose reading will be zero at resonance is :–

In an oscillating LC circuit the maximum charge on the capacitor is Q. The charge on the capacitor when the energy is stored equally between the electric and magnetic fields is:

The current in a circuit varies with time as I = 2 √t . Then the rms value of the current for the interval t = 2 to t = 4 sec is

The r.m.s. value of potential difference V shown in the figure is :-