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Q1. | The time constant of the circuit in figur |

A. | RC [Wrong Answer] |

B. | 2 RC [Correct Answer] |

C. | 3 RC [Wrong Answer] |

D. | 5 RC [Wrong Answer] |

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

⇒ As regards ∈

_{0}and ∈

_{r}(absolute and relative permittivity)

both ∈

_{0}and ∈

_{r}can be interpreted in terms of atomic properties of medium

only ∈

_{r}can be interpreted in terms of atomic properties of medium

only ∈

_{0}can be interpreted in terms of atomic properties

∈

_{r}has no physical significance

⇒ The sum of two sine waves of different frequencies is a sine wave.

TRUE

FALSE

⇒ A series resonant circuit has parameters 10 ω, 1 H and 0.1 F. It is excited by a voltage

*v*= 100 sin ω

*t*. At resonant frequency, the power dissipated in the circuit is

1000 W

707 W

500 W

414.14 W

⇒ In the given figure, of potentiometer V

_{0}= V

*(R*

_{i}_{0}/R

*) only*

_{i}R

_{L}= 0

R

_{L}= ∞

R

_{L}is neither low nor high

R

_{L}is low but not zero

⇒ X and Y are two random variable and Z = X + Y. Let σ

_{x}^{2}, σ

_{y}^{2}and σ

_{z}^{2}be variance of X, Y and Z. Then

σ

_{z}^{2}= σ

_{x}^{2}+ σ

_{y}^{2}

σ

_{z}^{2}≤ σ

_{x}^{2}+ σ

_{y}^{2}

σ

_{z}^{2}< σ

_{x}^{2}+ σ

_{y}^{2}

σ

_{z}^{2}> σ

_{x}^{2}+ σ

_{y}^{2}

⇒ In a resistance loaded amplifier, the gain decreases at high frequencies because

decreasing reactance of the stray C

_{T}

increasing reactance of the stray C

_{T}

increasing reactance of C

_{T}

decreasing reactance of C

_{T}

⇒ In an RC impedance function

the highest critical frequency is a pole

the highest critical frequency is a zero

the highest critical frequency is a pole or zero

the highest critical frequency is a pole at

*s*= 0

⇒ Find

*'X'*in the circuit bel

p(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)

0

Σ(14)

1

⇒ In figure, A is ideal ammeter having zero resistance. It will read __________ amp

2

2.5

3

4

⇒ In the absence of noise, if C is channel capacity in bits/s, δ

*f*is channel bandwidth in Hz and N is number of coding levels. Then

C = log

_{2}N

C = (δ

*f*) log

_{2}N

C = 2 (δ

*f*) log

_{2}N

C = 0.5 (δ

*f*) log

_{2}N

⇒ For a 4096 x 8 EPROM, the number of address lines is

14

12

10

8

⇒ In a number system with radix

*r*, the decimal value of 110 is equal to 4

*r*. The decimal values of 111 and

*r*respective are equal to

20, 5

16, 4

13, 3

8, 2

⇒

**Assertion (A):** Dielectric constant is independent of temperature unless the temperature is extremely high.

**Reason (R):** For normal temperatures the number of atoms per unit volume is constant.

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

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

A is true but R is false

A is false but R is true

⇒ The time base of a high frequency CRO whose screen diameter is 10 cm is set at 10 μ sec/cm. The lowest frequency which can be fully displayed on the screen is

more than 100 kHz

equal to 100 kHz

equal to 10 kHz

less than 10 kHz

⇒ The best excited reflector from a wave guide is

horn

parabolic

biconical

corner

⇒ Which of the following modes can exist in a rectangular waveguide?

TM

_{10}

TE

_{10}

TM

_{00}

TM

_{01}

⇒ When two

`ALU 1C 74181`

are cascadedthe carry out of first stage is connected to carry in of second stage

the carry in of first stage connected to carry in of second stage

the carry in of first stage is connected to carry out of second stage

the carry out of first stage is connected to carry out of second stage

⇒ If A = 3 +

*j*1, A

^{4}=

3.16 ∠18.4°

100 ∠73.72°

100 ∠18.4°

3.16 ∠73.22°

⇒ Maximum rectification efficiency for a half wave rectifier is

1

0.88

0.5

0.406

⇒ The antenna current of an AM transmitter is 8 A. When only the carrier is sent, but it increases to 8.93 A. When the carrier is sinusoidally modulated. The percentage modulation is nearly

0.9

0.8

0.75

0.7

⇒ A DIAC has two terminals, anode and cathode.

TRUE

FALSE

⇒ Occasionally a discrete amplifier user RF chokes instead of collector resistors. Such amplifiers are inherently

low pass amplifiers

high pass amplifiers

band pass amplifiers

none of the above

⇒ Which of the following

*cannot*provide as much time interval accuracy as the oscilloscope but can capture and display eight or more signals simultaneously, something that scopes cannot do?

Logic analyzer

Digital oscilloscope

Frequency analyzer

Wave analyzer

⇒ Circular polarized waves result when

magnitudes are the same

phases are the same

magnitudes are same and phase difference is 90°

magnitudes are same and phase difference is zero

⇒ If a line having Z

_{0}= 300 ∠ 0 W is open circuited at far end, VSWR is

0

1

∞

2

⇒ As compared to TTL, CMOS logic has

higher speed of operation

higher power dissipation

smaller physical size

all of the above

⇒ In a loss-less transmission line

R << ω L; G << ω C

R = ω L, G = ω C

R >> ω L; G >> ω C

none of the above

⇒ The noise figure of klystron amplifier is about

25 dB

3 dB

zero

1 dB

⇒ Large scale integration refers to

more than 50 gates on the same chip

more than 80 gates on the same chip

more than 100 gates on the same chip

none of the above

⇒ In 8085 microprocessor, the RST 5.5 interrupt service routine start from location

0020 H

0024 H

0028 H

002 CH