# Physics Ch 5 Class 12 Alternating Current

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In a full-wave rectification, the number of diodes used are:

PMC 2020
Physics
Alternating Current
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In a step up transformer ________.

NTS 2019
Physics
Alternating Current
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Reactance of an Inductor Is given by:

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that the supply for the potentiometer is taken?

PMC Practice 8
Physics
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A full wave rectifier is operating from 50 Hz mains. Fundamental frequency of ripple will be:

PMC Practice 1
Physics
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Electromagnetic waves are produced due to flow of

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P = Irms Vrms Is applicable for

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An alternating voltage source is connected to a resistor R, and a capacitor C, then which of the following statements about phase angle between voltage V and current I is correct?

NUMS 2019 Cancelled
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Power of RCL circuit at resonance Is?

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The angle made by the coil of an AC generator at a time Interval 3T/4 is?

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In a half wave rectifier, the diode conducts during:

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For an ideal step-up transformer Ps ——- Pp.

PMC Practice 8
Physics
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Impedance of a circuit Is calculated as:

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A half wave rectifier is operating from 50 Hz mains, fundamental frequency of ripple will be

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The bridge rectifier is preferred to an ordinary two diode full-wave rectifier because?

PMC Practice 2
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An alternation voltage V (in volts) is represented by the equation:
V = 300 sin (100πt)
What is the value of “f” for this voltage?

UHS 2019
Physics
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If the instantaneous current in a circuit is given by I = A sin (wt) ampere, the RMS value of the current is:

PMC Practice 3
Physics
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Consider two capacitors with capacitance 2µF and 4µF. With which type of connection will the 4µF capacitor have a greater amount of stored energy than the 2µF capacitor?

PMC Practice 2
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If an AC voltage of rms value of 10 volts is applied as input of a half-wave rectifier, then the voltage value of the DC output will be:

PMC Practice 4
Physics
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In electronic circuits, a PN junction diode is used to convert alternating current into direct current. This process is called:

NTS 2018
Physics
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Current that fluctuates periodically with time is ——

PMC Practice 4
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If a half wave rectifier is used to convert 50Hz AC into DC, then the number of pulses present in rectified voltage is:

PMC Sample 1
Physics
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What will be the Impedance for V = 10 sin(wt) and I = 20 sln(wt)

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The direction of current through the load resistance of a full-wave rectification circuit:

UHS 2019
Physics
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If a half-wave rectifier is used to convert 50 Hz AC into DC, then the number of pulses present in the rectifier voltage is:

PMC Practice 2
Physics
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Power factor. of RLC circuit at Resonance Is

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Which of the following color has the highest energy?

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Impedance in RLC series circuit Is given by

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Mutual inductance has a practical role in performance of:

PMC Practice 4
Physics
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X-rays have frequency greater than

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What is the range of typical band gap in conductors

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In case of half wave rectification the resistance of diode during negative half of A.C is:

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Physics
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In a step-down transformer, the current in the primary coil is ______ than that in the secondary coil.

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Physics
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Resistance of RCL series circuit at resonance Is?

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Step up transformer have ________ turns in secondary coil.

PMC Practice 1
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If the peak voltage is 9V, calculate the peak to peak voltage.

PMC Practice 8
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Voltage after which in forward bias current start to rise with increase in voltage is called:

PMC Sample 3
Physics
Alternating Current
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Power factor in an AC circuit Is?

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Which of the following are component of half wave rectifier?

PMC Practice 1
Physics
Alternating Current
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Wavelength of X-rays is of the order of?

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The ripple factor of a half-wave rectifier is:

PMC Practice 2
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At resonance, the RLC circuit behaves like:

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The maximum efficiency of a half-wave rectifier is:

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