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AC Applied to a Resistor

When an a.c s...

Question

When an a.c source is connected across a resistor :

A

the current leads the voltage in phase

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B

the current lags behind the voltage in phase

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C

the current and voltage are in same phase

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D

the current and voltage are out of phase

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Solution

The correct option is D the current and voltage are in same phase
The current and voltage are in same phase
$E = E_{o} S i n w t$
$i = \frac{E}{R} = \frac{E_{o}}{R} S i n w t$

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An RLC circuit with $R = 100 Ω$ is connected across ac source of 200V and angular frequency 300 rad/s. When the only capacitance is removed, the current lags behind voltage by $60^{\circ}$ . When only inductance is removed, the current leads the voltage by $60^{\circ}$ . The current in the circuit is___(in Ampere)

Q. 2. When an alternating voltage of 220 V is applied across a device P, a current of 0.25 A. flows through the circuit and it leads the applied voltage by an angle π/2 radian. When the same voltage source is connected across another device Q, the same current is observed in the circuit but in phase with the
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(a) 1/4√2
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Q. An LCR circuit with

100 Ω

resistance is connected to an AC source of 200 V and angular frequency of 300 rad/s. When only capacitor is removed, current lags behind the voltage by

60^{\circ}

. When only inductor is removed, current leads voltage by

60^{\circ}

, then rms current in LCR circuit is

LCR

series circuit with

100 Ω

resistance is connected to an

A . C .

200 V

and angular frequency

300 {rad s}^{- 1}

. When only the capacitor is removed, the current lags behind the voltage by

60^{\circ}

. When only inductor is removed, the current leads the voltage by

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. If all elements are connected, the current in the circuit is

Q. A series LCR circuit with

100 Ω

resistance is connected to an AC source of

200 V

and angular frequency

300 rad/s

. When only the capacitance is removed, the current lags behind the voltage by

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