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The time taken by an AC of $50 Hz$ in reaching from zero to the maximum value is

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Important Questions on Alternating Current

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

In the circuit shown below, if $V_{s} = V_{m} \sin ω t$ and the diode is ideal, the average value of voltage across $R_{L}$ is (Assume source resistance is zero)

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

40 μF

capacitor is connected to a

200 V

50 Hz

AC supply. The rms value of the current in the circuit is, nearly:

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

The peak current through a

200 mH

inductor connected to an

A C

source of peak value

210 V

and frequency

50 Hz

is ___.

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

The rms value of potential difference $V_{0}$ shown in figure is

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

An alternating voltage

V (t) = 220 \sin (100 π t)

volt is applied to a purely resistive load of

50 Ω

. The time taken for the current to rise from half of the peak value to the peak value is:

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

An AC source is rated at

220 V, 50 Hz

. The time taken for voltage to change from its peak value to zero is

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

In the given circuit the peak voltages across $C, L$ and $R$ are $30 V, 110 V$ and $60 V$ respectively. The rms value of the applied voltage is

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

An alternating current is given by the equation

i = i_{1} \sin ω t + i_{2} \cos ω t

. The rms current will be:

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

An alternating voltage is given by $E = 100 \sin (ω t + \frac{π}{6}) V$ . The voltage will be maximum for the first time when time is ( $T =$ time period)

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

The frequency of an alternating current is

50 Hz

. What is the minimum time taken by current to reach its peak value from zero value?

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

In Karnataka, the normal domestic

AC

power supply is rated as

220 V

50 Hz

. Here

220 V

and

50 Hz

refer to:

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

Out of the following graphs, which graph shows the correct relation (graphical representation) for LC Parallel resonant circuit?

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

100 W

bulb is connected to an

AC

source of

220 V, 50 Hz

. Then the current flowing through the bulb is

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

The RMS value of emf given by

E = (8 \sin ω t + 6 \cos ω t)

volt is

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

The mean or average value of AC over a complete cycle is

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

A C

source rated

220 V, 50 Hz

is connected to a resistor. The time taken by the current to change from its maximum to the rms value is :

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

A C

current is given by

I = I_{1} s i n ω t + I_{2} c o s ω t .

A hot wire ammeter will give a reading:

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

AC

circuit has

R = 100 Ω, C = 2 μ F

and

L = 80 mH,

connected in series. The quality factor of the circuit is :

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

When the rms voltages

V_{L}, V_{C}

and

V_{R}

are measured respectively across the inductor

L,

the capacitor

C

and the resistor

R

in a series

L C R

circuit connected to an

A C

source, it is found that the ratio

V_{L} : V_{C} : V_{R} = 1 : 2 : 3.

If the rms voltage of the

A C

source is

100 V,

then

V_{R}

is close to :

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Physics>Electricity and Magnetism>Alternating Current>AC Voltage Applied to a Resistor

The AC voltage across a resistance can be measured using a:

The time taken by an AC of 50 Hz in reaching from zero to the maximum value is

Important Questions on Alternating Current

Learn and Prepare for any exam you want !

The time taken by an AC of $50 Hz$ in reaching from zero to the maximum value is