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Q1. | Which of the following theorems is a manifestation of law of conservation of energy? |

A. | Tellegen's theorem [Correct Answer] |

B. | Reciprocity theorem [Wrong Answer] |

C. | Thevenin's theorem [Wrong Answer] |

D. | Norton's theorem [Wrong Answer] |

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

⇒ Consider the following statements, SWR of a transmission line is infinite when the load is

- a short circuit
- a complex impedance
- an open circuit
- a pure reactance

1 and 3 only

1, 2, 3

2, 3, 4

1, 2, 4

⇒ If X(

*z*) = 2

*az*

^{-1}/(1 -

*az*

^{-1})

^{3}and |

*a*| < |

*z*|, then the initial value

*x*

_{0}is

0

1

∞

2

⇒ Which of the following has unique representation of 0?

sign magnitude

1's complement

2's complement

both (b) and (c)

⇒ Which of the following is also called handshaking programmed data transfer?

Synchronous transfer

Asynchronous transfer

Interrupt driver transfer

Both (a) and (c)

⇒ FM amplifier in a superheterodyne receiver

increases selectivity

suppresses noise

provides improved tracking

improves the rejection of the image frequency

⇒ For a series RLC circuit bandwidth is ω

_{2}- ω

_{1}= R/2L.

TRUE

FALSE

⇒

**Assertion (A):** Magnetic tape can be accessed only sequentially.

**Reason (R):** Magnetic tape consists of magnetised spots or tracks.

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 correct R is wrong

A is wrong R is correct

⇒ Out of multiplexer and demultiplexer, which has select inputs?

Multiplexer only

Demultiplexer only

Both multiplexer and demultiplexer

None

⇒ The standard deviation of a set of observations is the rms value of the deviation from the arithmetic mean.

TRUE

FALSE

⇒ In a 4 input AND gate, the total number of High outputs for 16 input states are

16

8

4

1

⇒ Read the following statements about Excel

- It supports many arithmetic functions like SUM, ABS, EXP, INT, MOD etc.
- It supports many trigonometric functions.
- It supports IRR function to calculate interest rate.
- It supports PV function to calculate the present value of future receipts.

All

1, 2 and 3 only

1, and 2 only

1 only

⇒ A MASER is a

low noise device

high noise device

medium noise device

may be either high or medium noise device

⇒ Electromagnetic waves transport

energy only

momentum only

energy as well as momentum

neither energy nor momentum

⇒ Which of the following arithmetic operations requires only one operand in FORTRAN 77?

Addition

Multiplication

Negative

Substraction

⇒ If E is energy level of electron and E

_{F}is Fermi level, then

all quantum states with E less than E

_{F}will be occupied at T = 0

all quantum states with E less than E

_{F}will be empty at T = 0

some quantum states with E less than E

_{F}will be occupied at T = 0

none of the above

⇒ BCD numbers are useful whenever

binary to hexadecimal conversion is desired

binary to BCD conversion is desired

decimal information is transferred into or out of a digital system

none of the above

⇒ An amplifier signal is made up of just two frequencies 1000 Hz. The output signal consists of 500 Hz and 25000 Hz frequencies. This may be attributed to

harmonic distortion

intermodulation distortion

both (a) and (b)

none of the above

⇒ The characteristic equation of flip-flop gives the next state Q

_{N + 1}in terms of present state Q

_{N}and the inputs. Which one of the following is the characteristic equation of J - K flip-flop?

Q

_{N+1}= JQ

_{N}+ KQ

_{N}

Q

_{N+1}= J + KQ

_{N}

Q

_{N+1}= KQ

_{N}+ JQ

_{N}

Q

_{N+1}= K + JQ

_{N}

⇒ Pulse modulation is used in

radio navigation

automatic landing equipment

data communications

all of the above

⇒ The conductivity of an intrinsic semiconductor is (symbols have the usual meanings).

generally less than that a doped semiconductor

σ

_{i}=

*en*

_{i}(μ

_{n}- μ

_{p})

σ

_{i}=

*en*

_{i}(μ

_{n}+ μ

_{p})

σ

_{i}=

*n*

_{i}(μ

_{n}- μ

_{p})

⇒ A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What will be the effect on output if the amplifier's gain is twice that required by the Barkhausen criterion?

Linear oscillations

Non-linear oscillations

Damped oscillations

No oscillations

⇒ Calculate the resistivity of

*n*-type semiconductor from the following data, Density of holes = 5 x 10

^{12}cm

^{-3}. Density of electrons = 8 x 10

^{13}cm

^{-3}, mobility of conduction electron = 2.3 x 10

^{4}cm

^{2}/ V-sec and mobility of holes = 100 cm

^{2}/V-sec.

0.43 Ω-m

0.34 Ω-m

0.42 Ω-m

0.24 Ω-m

⇒ In the circuit, shown the current I marked is give

2.22 A

1.78 A

4.44 A

0.0833333333333333

⇒ Consider the following statements for 8085

- The most significant 8 bits of address are transmitted on the 8 lines on which data is transmitted.
- Eight pins are dedicated to transmit the most significant 8 bits of memory address.
- The least significant 8 bits of address are transmitted on the lines on which data is transmitted.
- The data and leass significant 8 bits are transmitted at different points in time.

all

1, 2 and 3 only

2, 3 and 4 only

1, 3 and 4 only

⇒ In a polyatomic gas, the types of polarization which exist together are

electronic and orientational

electronic and ionic

ionic and orientational

electronic, orientational and ionic

⇒ Waveguides are generally used above

20 MHz

100 MHz

200 MHz

1000 MHz

⇒ As the area of a public meeting increases the amplifier power output required increases.

TRUE

FALSE

⇒ In a sequential circuit the output at any instant depends on

present inputs only

past inputs only

past outputs only

past output and present input

⇒ For a series resonant circuit at low frequency impedance is __________ and at high frequency circuit impedance is __________ .

capacitive, inductive

inductive, capacitive

resistive, inductive

capacitive, resistive

⇒ If ω is the frequency of modulating voltage in FM, the modulation index is proportional to

ω

1/ω

ω

1/ω