Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | When a high voltage reference is required it is advantageous to use two or more zener diodes in series to allow |

A. | higher voltage [Wrong Answer] |

B. | higher dissipation [Wrong Answer] |

C. | lower temperature coefficient [Wrong Answer] |

D. | all of the above [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Consider a baseband binary PAM receiver shown below. The additive channel noise

*n*(

*t*) is whit with power spectral density S

_{N}(

*f*) = N

_{0}/2 = 10

^{-20}W/Hz. The low-pass filter is ideal with unity gain and cutoff frequency 1 MHz. Let Y

_{k}represent the random variable

*y*(

*t*

0.5 x

0.5 x

0.5 x

_{k}0.5 x*e*^{-3.5}0.5 x

*e*^{-5}0.5 x

*e*^{-7}0.5 x

*e*^{-10}

⇒ The scale of hot wire instrument is linear.

TRUE

FALSE

⇒ Fundamental mode is another name for

level operation

pulse operation

clock operation

none of these

⇒ The signal

causal

non-causal

depends on

none of these

⇒ __________ acts as a depolarizer in a dry cell.

ammonium chloride

carbon powder

manganese dioxide

zinc chloride

⇒ In the circuit, S was initially open. At time

1 H

2 H

3 H

4 H

⇒ Current requirement of a piezo buffer is about

100mA

20mA

4mA

0.4mA

⇒ The start of modern computer age was started by the event

development of disc drive

development of transistor

development of Hollerith code

design of EVIAC computer

⇒ A direct radiating cone type loudspeaker attenuates :

medium range frequencies

very low frequencies

high frequencies

very low and high frequencies

⇒

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

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

A is true but R is false

A is false but R is true

⇒ An input voltage V(

10 cos (

10 cos (

10 cos (

10 cos (

⇒ JFET is also known as

linear device

square law device

inverse law device

logarithmic law device

⇒ The

⇒ In the stabilized reactance modulator AFC system

phase modulation is converted into amplitude modulation by the equalizer circuit

the discriminator frequency must not be too low or the system will fail

the discriminator must have a fast time constant to prevent demodulation

the higher discriminator frequency, better the oscillator frequency stability

⇒ In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally

equal

different

equal or different

different but sometimes equal

⇒ The compensator in the given figure

lag compensator

lead compensator

lag-lead compensator

none of the above

⇒ The gate width of a monostable multivibrator is given by

T = 1.1 RC

T = 0.693 RC

0.963 RC

T = 0.369 RC

⇒ A carrier is simultaneously modulated by two sine waves having modulation indices of 0.4 and 0.3. The total modulation index will be

0.1

0.7

0.5

0.35

⇒ An atom of a rare gas is placed is an electric field E. Then

the nucleus will be shifted in the direction of E by an amount which is proportional to E.

the nucleus will not be shifted.

the nucleus will be shifted in the direction of E by an amount which is independent of E.

the nucleus will be shifted in a direction opposite to that of E.

⇒ A material for permanent magnet should have

High retentivity

High permeability

Low hysteresis loss

High hysteresis loss

⇒ 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 percentage negative feedback should be introduced to the amplifier so that linear oscillations result?

0.0125

0.025

-0.0125

-0.025

⇒ Vectored interrupt is an interrupt that takes the program to a vector location. TRAP vectors to 0024 FI, RST 7.5 to 003 CH, RST 6.5 to 0034 H and

RST 5.5

RST 6.5

24 H to 48 H

RST 5.5 to 002 CH

⇒ Consider the following statements:

(I) and (III)

(I) and (IV)

(II) and (III)

(II) and (IV)

⇒ If a two-port network is reciprocal as well as symmetrical, which one of the following relationships is correct?

Z

Y

AD - BC = 1 and A = D

all of the above

⇒ If A = 4∠7°, A

16∠14°

16∠49°

16∠7°

16∠3.5

⇒ The characteristic impedance of coaxial cable is about

1000 ohm

500 ohm

250 ohm

75 ohm

⇒ For oscillations to starts, the loop gain A β of the oscillator must be initially

less than unity

0.5

1

more than unity

⇒ The bridge is balanced when the value of R is

50 Ω

100 Ω

200 Ω

250 Ω

⇒ An instruction used to set cany flag in a computer is classified as

data transfer

arithmetic

logical

program control

⇒

A-1, B-2, C-3

A-2, B-3, C-1

A-3, B-2, C-1

A-3, B-1, C-2

⇒ The scale of hot wire instrument is linear.

TRUE

FALSE

⇒ Fundamental mode is another name for

level operation

pulse operation

clock operation

none of these

⇒ The signal

*y*(*t*) =*x*(-*t*) is __________ .causal

non-causal

depends on

*x*(*t*)none of these

⇒ __________ acts as a depolarizer in a dry cell.

ammonium chloride

carbon powder

manganese dioxide

zinc chloride

⇒ In the circuit, S was initially open. At time

*t*= 0, S is closed. When the current through the inductor is 6 A, the rate of change of current through the resistor is 6 A/s. The value of the inductor woul1 H

2 H

3 H

4 H

⇒ Current requirement of a piezo buffer is about

100mA

20mA

4mA

0.4mA

⇒ The start of modern computer age was started by the event

development of disc drive

development of transistor

development of Hollerith code

design of EVIAC computer

⇒ A direct radiating cone type loudspeaker attenuates :

medium range frequencies

very low frequencies

high frequencies

very low and high frequencies

⇒

**Assertion (A):** A tree of graph contains all the nodes of the graph.

**Reason (R):** The number of links is always less than the number of tree branches.

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

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

A is true but R is false

A is false but R is true

⇒ An input voltage V(

*t*) = 10 2 cos (*t*+ 10°) + 10 3 cos (2*t*+ 10°)*V*is applied to a series combination of resistance R = 1 kΩ inductance L = 1H. The resulting steady-state current*i*(*t*) in ampere is10 cos (

*t*+ 55°) + 10 cos (2*t*+ 10° tan^{-1}2)10 cos (

*t*+ 55°) + 103/2 cos (2*t*+ 55°)10 cos (

*t*- 35) + 10 cos (2*t*+ 10° - tan^{-1}2)10 cos (

*t*- 35) + 103/2 cos (2*t*+ 35°)⇒ JFET is also known as

linear device

square law device

inverse law device

logarithmic law device

⇒ The

*h*parameter equivalent to ac resistance*r*_{e}is*h*_{ib}*h*_{fe}*h*_{ob}*h*_{rb}⇒ In the stabilized reactance modulator AFC system

phase modulation is converted into amplitude modulation by the equalizer circuit

the discriminator frequency must not be too low or the system will fail

the discriminator must have a fast time constant to prevent demodulation

the higher discriminator frequency, better the oscillator frequency stability

⇒ In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally

equal

different

equal or different

different but sometimes equal

⇒ The compensator in the given figure

lag compensator

lead compensator

lag-lead compensator

none of the above

⇒ The gate width of a monostable multivibrator is given by

T = 1.1 RC

T = 0.693 RC

0.963 RC

T = 0.369 RC

⇒ A carrier is simultaneously modulated by two sine waves having modulation indices of 0.4 and 0.3. The total modulation index will be

0.1

0.7

0.5

0.35

⇒ An atom of a rare gas is placed is an electric field E. Then

the nucleus will be shifted in the direction of E by an amount which is proportional to E.

the nucleus will not be shifted.

the nucleus will be shifted in the direction of E by an amount which is independent of E.

the nucleus will be shifted in a direction opposite to that of E.

⇒ A material for permanent magnet should have

High retentivity

High permeability

Low hysteresis loss

High hysteresis loss

⇒ 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 percentage negative feedback should be introduced to the amplifier so that linear oscillations result?

0.0125

0.025

-0.0125

-0.025

⇒ Vectored interrupt is an interrupt that takes the program to a vector location. TRAP vectors to 0024 FI, RST 7.5 to 003 CH, RST 6.5 to 0034 H and

RST 5.5

RST 6.5

24 H to 48 H

RST 5.5 to 002 CH

⇒ Consider the following statements:

- In the 2's complement representation, negative numbers are stored in sign magnitude form.
- Taking 2's complement is equivalent to sign change.
- In a 4 bit complement representation of a binary number A.
- In the 2's complement representation the most significant bit (MSB) is zero for a positive number.

(I) and (III)

(I) and (IV)

(II) and (III)

(II) and (IV)

⇒ If a two-port network is reciprocal as well as symmetrical, which one of the following relationships is correct?

Z

_{12}= Z_{21}and Z_{11}= Z_{22}Y

_{12}- Y_{21}and Y_{11}- Y_{22}AD - BC = 1 and A = D

all of the above

⇒ If A = 4∠7°, A

^{2}is16∠14°

16∠49°

16∠7°

16∠3.5

⇒ The characteristic impedance of coaxial cable is about

1000 ohm

500 ohm

250 ohm

75 ohm

⇒ For oscillations to starts, the loop gain A β of the oscillator must be initially

less than unity

0.5

1

more than unity

⇒ The bridge is balanced when the value of R is

50 Ω

100 Ω

200 Ω

250 Ω

⇒ An instruction used to set cany flag in a computer is classified as

data transfer

arithmetic

logical

program control

⇒

Match the following:

List I (μP) | List II (Number of bits in register) | ||
---|---|---|---|

A. | 8085 | 1. | 32 bit |

B. | 8086 | 2. | 16 bit |

C. | 68000 | 3. | 8/16 bit |

A-1, B-2, C-3

A-2, B-3, C-1

A-3, B-2, C-1

A-3, B-1, C-2