# Question 11.C-A.65: In the circuit diagram shown below, explain the voltage acro...

In the circuit diagram shown below, explain the voltage across R. The sinusoidal voltage has a peak value of 200 V and the capacitor used has long charging time. Assume the diode to be an ideal diode.

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Question: 11.C-A.72

## Find the energy dissipated in 10 minutes in the diode in the circuit shown above. The barrier potential across a diode is 0.7 V which remains constant. (Assume the diode to be ideal) ...

The PD across the diode is 0.7 V. The remaining vo...
Question: 11.C-A.71

## Calculate the current through the following circuits. (The diodes are ideal) ...

(a) In the circuit, the diode  D_{1}[/latex...
Question: 11.C-A.70

## In a n-p-n transistor circuit, the collector current is 9.9 mA. If 90% of the electrons emitted reach the collector, find out the value of emitter current and base current. ...

$I_{ e }=I_{ b }+I_{ c }$ Here colle...
Question: 11.C-A.69

## In an oscilloscope, the cathode emits the electrons which are accelerated by the anodes. Explain the kind of voltages to be applied to the horizontal and vertical plates so that images formed on the defl ecting screen are (a) horizontal line (b) vertical line ...

(a) To get horizontal line on the screen, an AC vo...
Question: 11.C-A.68

## In a vacuum diode, some of the electrons possessing suffi cient kinetic energy can reach the plate even if the plate potential is negative. For a certain diode, the plate current becomes zero when plate potential is –10 V. What is the kinetic energy of the electrons in eV, if the plate potential ...

The plate current is zero when the electrons are c...
Question: 11.C-A.67

## Electrons emitted from the surface of a cathode have sufficient kinetic energy to reach the anode even if the anode is at a negative potential. In a vacuum diode, no current flows when the anode potential is less than –5 V. Find the maximum kinetic energy of the electrons in electron volt, ...

(i) Minimum negative potential required to stop th...
Question: 11.C-A.66

## A graph of vacuum diode current I, is plotted against the anode voltage, VP for two different temperatures T1 and T2 (T2 > T1) of the cathode, as shown in the figure below. (1) For the same anode voltage, (called plate voltage) why is the current more when the cathode temperature changes from T1 ...

(i) As the temperature of the cathode increases, i...
Question: 11.C-A.64

## In the following circuit, explain the flow of current through resistor R. Can we use the circuit to convert AC to DC? Explain. ...

(i) Identify the diodes in the circuit which condu...
Question: 11.C-A.63