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Q1. | In a purely resistive circuit the instantaneous power varies from zero to maximum twice in each cycle. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ If the characteristic equation of a closed loop system is

*s*

^{2}+ 2

*s*+ 2, then the system is :

over damped

critically damped

under damped

undamped

⇒ ECL can be used to high frequencies in the order of

500 kHz

1 MHz

100 MHz

500 MHz

⇒ For the power amplifier circuit shown below, the maximum power dissipated by both output transisto

9.66 W

30.11 W

31.66 W

33.66 W

⇒ A 12 kHz pulse wave-form is amplified by a circuit having an Upper cut-off frequency of 1 MHz. The minimum input pulse width that can be accurately reproduced is

83.33 μ sec

1 μ sec

0.1 m sec

3.5 m sec

⇒

**Assertion (A):** Light triggering is very suitable for HVDC transmission.

**Reason (R):** Light triggering has the advantage of complete electrical isolation of gate circuit.

Both A and R are correct and R is correct explanation of A

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm

^{2}/s respectively. The diffusion length of carriers is

0.1 cm

0.01 cm

0.0141 cm

1 cm

⇒ Fundamental mode is another name for

level operation

pulse operation

clock operation

none of these

⇒ The current distribution along a travelling wave antenna can be written in the form

*f*(

*z*) =

*f*

_{0}e

^{-jβz}

*f*(

*z*) =

*f*

_{0}sin β

_{z}

*f*(

*z*) =

*f*

_{0}

*f*(

*z*) =

*f*

_{0}cos (ω

*t*- β

_{z})

⇒ Refraction of electromagnetic waves occurs when they

pass through a small slot in a conducting plane

pass into a medium of different dielectric constant

are polarized at right angles to the direction of propagation

encounter a perfectly conduction surface

⇒ In an amplifier with a gain of - 1000 and feedback factor β = - 0.1, the change in gain is 20% due to temperature. The change in gain for feedback amplifier will be

0.1

0.05

0.002

0.0001

⇒ For the floating point numbers 1.81 x 10

^{-29}and 0.0152 x 10

^{18}the normalised forms are

0.181 x 10

^{-28}and 0.152 x 10

^{17 }respectively

18.1 x 10

^{-30}and 0.152 x 10

^{17}respectively

0.181 x 10

^{-28}and 1.52 x 10

^{16}respectively

None of the above

⇒ Following figure is a signal conditioning Amplifier, changes gain depending upon the polarity of V

_{s}. What will be circuit voltage gain for + V

_{s}and for - V

_{s}if D

_{2}is id

A

_{V}= -R

_{3}/R

_{1}

R

_{3}/R

_{1}

R

_{1}/R

_{3}

1 + R

_{3}/R

_{1}

⇒

**Assertion (A):** Different symbols are used for different gates

**Reason (R):** IEEE symbols are the same as traditional symbols for gates.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ A rare gas having N atoms/m

^{3}is subjected to an electric field E. The electric dipole moment per unit volume is proportional to N and E.

TRUE

FALSE

⇒ CC circuit is suitable for impedance matching.

TRUE

FALSE

⇒ In the given figure 15.6 shows a series, R - C circuit fed by a current source

*i*(

*t*). There is an initial voltage

*v*

_{0}. across the capacitor. The sy

is linear

is non linear

may be linear or non linear

is linear only if

*v*

_{0}is zero

⇒ A cycloconverter for single phase operation has

one positive group and one negative group converters

two positive group and two negative group converters

three positive group and three negative group converters

any of the above

⇒ The orbital period of a geostationary communication satellite is

12 hours

24 hours

36 hours

48 hours

⇒ In what range should Re(

*s*) remains so that Laplace transform of the function

*e*

^{(a + 2)t + 5}exists?

Re(

*s*) >

*a*+ 2

Re(

*s*) >

*a*+ 7

Re(

*s*) <

*a*

Re(

*s*) >

*a*+ 5

⇒ Consider the following statements:

- The positiveness of coefficients of characteristic equation is necessary as well as sufficient condition for stability of first and second order systems.
- The positiveness of coefficients of characteristic equation ensures negativeness of real roots but is not sufficient condition for stability of third and higher order systems.

only 1 is correct

both 1 and 2 are correct

only 2 is correct

both are wrong

⇒ For a bipolar transistor, avalanche multiplication factor depends on __________ .

V

_{CE}

V

_{CB}

V

_{BE}

none of these

⇒ T.V. broadcasting based on

line of sight communication

ionospheric propagation

ground wave

medium wave

⇒ Typical size of digital IC is about

1″ x 1″

2″ x 2″

0.1″ x 0.1″

0.001″ x 0.001″

⇒ The unit of ∇ x H is

Ampere

Ampere/meter

Ampere/m

^{2}

Ampere-meter

⇒ The ASCII code is for information interchange by a binary code for

alphabet only

number only

alpha-numeric and other common symbols

none of these

⇒ When sources of different frequencies feed a network the only method of solution is superposition theorem.

TRUE

FALSE

⇒ Which of the following statements is false?

Push pull signals are equal and opposite in phase

Class AB operation cannot be used for a push pull audio power output phase

A push pull output transformer has a centre-tapped primary

All of the above

⇒ An FM transmitter has maximum frequency deviation of 75 kHz and reproduces audio signals up to 15 kHz. Minimum channel width required is __________ kHz.

180

120

90

60

⇒ Schmitt trigger can be used as a

comparator

square-wave generator

flip-flop

all of these

⇒ As compared to a full wave diode rectifier circuit using centre tapped transformer, the bridge diode rectifier circuit has the main advantage of

higher current carrying capacity

higher efficiency

lower ripple factor

lower PIV