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Analog circuits...

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  • Question 1
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    A half-wave rectifier is used to charge a 12V battery through a resistance ‘R’. The input transformer is fed with 34 AC with turns ration 2 : 1. The conduction period of the diode is

  • Question 2
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    The voltage source VAB = 4 sin ωt is applied to the terminal A and B of the circuit shown In Fig. the diode is assumed to be ideal. The impedance by the circuit across the terminals A and B is ________ kΩ

  • Question 3
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    The correct option matching List - I to List - II is

  • Question 4
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    The theoretical maximum efficiency of a bridge rectifier circuit is

  • Question 5
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    The drain of an n-channel MOSFET is directly connected to gate so that VDS = VGS. The threshold voltage of it is 3V, if the drain current is 3 mA when VGS = 4 V then for VGS = 5V the value of ID is____ mA

  • Question 6
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    What is the primary reason a full-wave rectifier without a filter has a lower ripple factor compared to a half-wave rectifier?

  • Question 7
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    A half wave rectifier is used to supply 24 V DC to a resistive load of 500 Ω and the diode has a forward resistance of 50 Ω. What is the maximum value of the AC voltage required at the input?

  • Question 8
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    The diode D used in circuit below is ideal. The voltage drop Vab across the 1 kΩ Resistor in volt is ____

  • Question 9
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    What is the value of inductance to be used in the inductor filter connected to a full-wave rectifier operation at 60 Hz to provide a DC output with 4% ripple for a 100 Ω load?

  • Question 10
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    Diodes are used to clip voltages in circuits because they act as

  • Question 11
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    When a capacitor is connected across the output terminals of a half or full-wave rectifier, the output voltage

  • Question 12
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    The equivalent DC output voltage of a full-wave rectifier is ____ the equivalent DC output voltage of a half-wave rectifier.

  • Question 13
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    If 120 C of charge passes through an electric conductor in 60 sec, the current in the conductor is:

  • Question 14
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    A solid copper sphere, 10 cm in diameter is deprived of 1020 electrons by a charging scheme. The charge on the sphere is:

  • Question 15
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    A lightning bolt carrying 30,000 A lasts for 50 microseconds. If the lightning strikes an airplane flying at 20,000 feet, what is the charge deposited on the plane?

  • Question 16
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    Consider the circuit graph shown in figure below. Each branch of circuit graph represent a circuit element. The value of voltage V1 is​:

  • Question 17
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    What is the value of Req = ?

  • Question 18
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    Twelve 6 resistor are used as edge to form a cube. The resistance between two diagonally opposite corner of the cube is: (in ohm)

  • Question 19
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    The energy required to charge a 10 µF capacitor to 100 V is:

  • Question 20
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    A capacitor is charged by a constant current of 2 mA and results in a voltage increase of 12 V in a 10 sec interval. The value of capacitance is ________.

  • Question 21
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    During high frequency applications of a B.J.T., which parasitic capacitors arise between the base and the emitter?

  • Question 22
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    During high frequency applications of a B.J.T, which parasitic capacitors arise between the collector and the base?

  • Question 23
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    Which parasitic capacitors do not affect the frequency response of the C.E. stage, of the B.J.T.?

  • Question 24
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    If the total capacitance between the base and the emitter increases by a factor of 2, the transit frequency __________

  • Question 25
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    Which effect plays a critical role in producing changes in the frequency response of the B.J.T.?

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