WB JEE
Physics
Alternating Current
Previous Years Questions

When an AC source of emf E with frequency $$\omega$$ = 100 Hz is connected across a circuit, the phase difference between E and current I in the circu...
The rms value of potential difference V shown in the figure is...
Consider a pure inductive AC circuit as shown in the figure. If the average power consumed is P, then...
When a DC voltage is applied at the two ends of a circuit kept in a closed box, it is observed that the current gradually increases from zero to a cer...
When a 60 mH inductor and a resistor are connected in series with an AC voltage source, the voltage leads the current by 60$$^\circ$$. If the inductor...
A parallel plate capacitor in series with a resistance of 100$$\Omega$$, an inductor of 20 mH and an AC voltage source of variable frequency shows re...
An alternating current is flowing through a series L-C-R circuit. It is found that the current reaches a value of 1 mA at both 200 Hz and 800 Hz frequ...
When the frequency of the AC voltage applied to a series LCR circuit is gradually increased from a low value, the impedance of the circuit

MCQ (More than One Correct Answer)

A 400$$\Omega$$ resistor, a 250 mH inductor and a 2.5 $$\mu$$F capacitor are connected in series with an AC source of peak voltage 5 V and angular f...
EXAM MAP
Joint Entrance Examination