WB JEE 2025 | Alternating Current Question 1 | Physics

For a domestic AC supply of 220 V at 50 cycles per sec, the potential difference between the terminals of a two-pin electric outlet in a room is given by

$\mathrm{V}(\mathrm{t})=220 \sqrt{2} \operatorname{Cos}(100 \pi \mathrm{t})$

$V(t)=220 \operatorname{Sin}(50 t)$

$\mathrm{V}(\mathrm{t})=220 \operatorname{Cos}(100 \pi \mathrm{t})$

$\mathrm{V}(\mathrm{t})=220 \sqrt{2} \operatorname{Cos}(50 \mathrm{t})$

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

WB JEE 2024 Physics - Alternating Current Question 3 English

In a series LCR circuit, the rms voltage across the resistor and the capacitor are $$30 \mathrm{~V}$$ and $$90 \mathrm{~V}$$ respectively. If the applied voltage is $$50 \sqrt{2} \sin \omega t$$, then the peak voltage across the inductor is

70 V

50 V

70$$\sqrt2$$ V

50$$\sqrt2$$ V

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

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 circuit is observed to be $${\pi \over 4}$$ as shown in the figure. If the circuit consist of only RC or RL in series, then

WB JEE 2022 Physics - Alternating Current Question 4 English

R = 1 k$$\Omega$$, C = 5 $$\mu$$F

R = 1 k$$\Omega$$, L = 10 H

R = 1 k$$\Omega$$, L = 1 H

R = 1 k$$\Omega$$, C = 10 $$\mu$$F

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

WB JEE 2021 Physics - Alternating Current Question 6 English

The rms value of potential difference V shown in the figure is

$${{{V_0}} \over 2}$$

V₀

$${{{V_0}} \over {\sqrt 3 }}$$

$${{{V_0}} \over {\sqrt 2 }}$$

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