Answer to Question #65921 in Electric Circuits for sharma

Question

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.

Answer 1

1. State, with reasons, whether the following statements are True or False.

i) Ideal voltage source has infinite internal resistance.

True

ii) Transformer is a passive device hence it cannot increase the voltage.

False

Transformer passive element, but it can increase voltage. (Step-up transformer)

iii) Field effect transistor (FET) is a current controlled device.

False

It’s voltage controlled device

iv) Forward biasing of a semiconductor junction diode reduces its energy band gap.

True

v) Amplifier with common collector mode offers maximum voltage gain.

False

vi) Ripple factor of a center tapped full wave rectifier is greater than that of a bridge

rectifier, which uses four diodes.

False

vii) Operational amplifier in non-inverting mode cannot amplify negative signals.

False

viii) IC LM380 is a small signal amplifier used to amplify the voltage.

True

ix) Largest decimal number represented by a 2-digit hex number is 99.

False

(255)

x) In a CRO sweep generator output is given to the vertical deflection plates.

False