Basic Electronics Engineering Including Laboratory Manual by Satya Sai Srikant, Prakash Kumar Chaturvedi | 9789811374135 | 9811374139 | Holooly

Basic Electronics Engineering Including Laboratory Manual [EXP-48401]

63 SOLVED PROBLEMS

Question: 5.12

(a) Divide 110 by 10 (b) 1111 by 110.

Verified Answer:

Question: 2.14

A 230 V, 50 Hz voltage is applied to the primary of a 4: 1 stepdown transformer used in a bridge rectifier having a load resistance of 1000 X. Assuming the diode to be ideal, calculate (a) dc output voltage, (b) dc power delivered to the load, (c) PIV and (d) output ripple frequency.

Verified Answer:

(a) RMS value of transformer secondary voltage [la...

Question: 2.12

A diode with internal resistance rf=20 X in half-wave rectifier, is applied V = 50 sin xt and RL =800 X. Calculate (a) Im, Idc and Irms, (b) ac power input and dc power output, (c) dc output voltages and (d) efficiency of rectifier.

Verified Answer:

V=50\sin\omega t

V_m=50[/lat...

Question: 2.13

A full-wave rectifier delivers 50 W to a load of 200 X. If the ripple factor is 1%, calculate the ac ripple voltage across the load.

Verified Answer:

P_{dc}=\frac{V_{dc}^2}{R_L}

...

Question: 2.5

A germanium diode at T = 300 °K conducts 5 mA at V = 0.35 V.Find the diode current if V = 0.4 V.

Verified Answer:

I_1=5mA,V_1=0.35V

I_2=?,V_2=...

Question: 2.2

A germanium diode carries a current of 1 mA of room temperature,when a forward bias of 0.15 V is applied. Calculate the reverse saturation current at room temperature [UPTECH 2005–2006, First Semester].

Verified Answer:

Given

T=273+27=300^\circ K

V...

Question: 2.10

A half-wave rectifier has a resistive load RL=1000 X, with an ac voltage 325 V (peak value) and the diode has a forward resistance of 100 X. Calculate (a) peak average and RMS value of current, (b) dc output power, (c) ac input power and (d) efficiency of the rectifier

Verified Answer:

(a) Peak value of current,

I_{m} =\frac{V_m...

Question: 2.11

A half-wave rectifier is shown in Fig.2.20. Find maximum and average values of power delivered to the load. Assume RL=200 X(N1:N2=2:1).

Verified Answer:

N_1:N_2=2:1

V_{in}=V_1=230 V...

Question: 3.2

A transistor has an emitter current of 10 mA and a collector current 9.95 mA. Calculate its base current. (U.P. Technical University Special Exam 2001)

Verified Answer:

Given

I_E=10mA

,

I_C=9.95mA[/la...

Question: 2.8

A Zener diode shunt regulator is shown in Fig. 2.14. Determine (i) the load voltage, (ii) voltage drop across RS and (iii) current through the Zener diode.

Verified Answer:

Given that

V_S=30V

,

V_Z=12V[...

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