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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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Similar questions

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
applied voltage. The current when the same source is connected across a series combination of P and Q is
(a) 1/4√2
A lagging in phaseby π/4 with voltage
(b) 1/4√2 leading in phase by π/4 with voltage
(c) 1/√2
A leading in phase by π/4 with voltage
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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

60^{\circ}

. 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

60^{\circ}

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

60^{\circ}

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