Electric Circuits Answers

b) Which processes are responsible for the charge carrier transport in a semiconductor?
Which of these govern in the case of a bulk semiconductor when no potential is
applied?

3. a) A series LCR circuit with L = 400 mH, C = 20 nF and R = 250
is connected to an
AC source of 65 V. Calculate the resonance frequency and Q of the circuit. What is
the current flowing through the circuit and voltage across the capacitor at resonance
frequency?

2. a) Use superposition principle to find the current flowing through R2 in Fig.1.
b) Explain with a neat diagram application of p-n junction diode as a peak voltage
detector.

1. State, with reasons, whether the following statements are True or False.
i) Ideal voltage source has infinite internal resistance.
ii) Transformer is a passive device hence it cannot increase the voltage.
iii) Field effect transistor (FET) is a current controlled device.
iv) Forward biasing of a semiconductor junction diode reduces its energy band gap.
v) Amplifier with common collector mode offers maximum voltage gain.
vi) Ripple factor of a center tapped full wave rectifier is greater than that of a bridge
rectifier, which uses four diodes.
vii) Operational amplifier in non-inverting mode cannot amplify negative signals.
viii) IC LM380 is a small signal amplifier used to amplify the voltage.
ix) Largest decimal number represented by a 2-digit hex number is 99.
x) In a CRO sweep generator output is given to the vertical deflection plates.

A house fitted with a motor of 1 Hp,5 bulbs consuming 0.2 Ampere each ans 2fans of 80 watt each.If all the apliancea work for 5 hours a day.Calculate the monthlg bill.Energy cost=Rs 4/unit(given V=200)

Calculate the voltage of a battery that provides 70 joules of energy to every 15 coulombs o charge V=E (joules)/Q (coulombs)

There is a cylindrical conductor of radius r, it has cavity of r/2. It's charge density varies as ar^2. Find electric current inside conductor.

Two fixed charges A and B of 5microC each are separated by a distance of 6m. C is the mid point of the line joining A and B. A charge 'Q' of -5microC is shot perpendicular to the line joining A and B through C with a kinetic energy of 0.06J. The charge Q comes to rest at a point D. Calculate the distance CD.

how to calculate the current if the capacitance and the volatge are given

if electric current=0,potential difference=0 then resistance=?