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Q1. | The current rating of a cable depends on |

A. | length of cable [Wrong Answer] |

B. | diameter of cable [Correct Answer] |

C. | both length and diameter of cable [Wrong Answer] |

D. | none of the above [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ If V

_{dc1}is the dc output voltage in half wave controlled rectifier circuit feeding resistive load and V

_{dc2}is the dc output voltage in full wave controlled rectifier circuit (M - 2 connection) feeding resistive load, then

V

_{dc1}= 0.5 V

_{dc2}for all values of firing angle

V

_{dc1}= V

_{dc2}for all values of firing angle

V

_{dc1}≤ 0.5 V

_{dc2}for all values of firing angle

V

_{dc1}≥ 0.5 V

_{dc2}for all values of firing angle

⇒ Which is correct for a transfer function?

The poles and zero must be complex

If the poles and zeros are complex or imaginary, they must be conjugate

If the poles and zeros are complex they must be simple

If a zero is imaginary, it must be simple

⇒ A linear displacement digital transducer generally uses

straight binary code

BCD

gray code

hexadecimal code

⇒ Consider the following statements

- An iron cored choke is a nonlinear device.
- A carbon resistor kept in a sunlight is a time - invariant and passive device.
- A dry cell is a time - varying and active device.
- An air capacitor is a time - invariant and passive device

1, 2, 3 and 4 are correct

1, 2 and 3 are correct

1, 2 and 4 are correct

2 and 4 are correct

⇒ In following figure find V

_{DSQ}by assuming gate current is negligible for the

*p*-channel JFET. (if I

_{DQ}= - 6 mA, R

_{S}= 0, V

_{DD}= -18 V, R

_{D}= 2 kΩ, I

_{DSS}= - 10 mA, I

_{PO}= - 3 V)

4 V

- 6 V

- 10 V

6 V

⇒ Two messages

*m*

_{1}, and

*m*

_{2}have a probability of 0.5 each. The entropy is

0.25

0.5

0.75

1

⇒ Consider isotropic radiator radiating a power of 1 watt. At a distance of 1 metre, the power per unit area with equal

1 watt/m

^{2}

4p watt/m

^{2}

1/4p watt/m

^{2}

2p watt/m

^{2}

⇒ Under ordinary circumstances, impulse noise can be reduced in

FM only

AM only

both AM and FM

none of the above

⇒ Full adder circuit can be implemented by

Multiplexers

Half adders

AND or OR gates

Decoders

⇒ The storage capacity of audio CD is 540 Mb per side.

TRUE

FALSE

⇒ As the number of flip flops are increased, the total propagation delay of

ripple counter increases but that of synchronous counter remains the same

both ripple and synchronous counters increase

both ripple and synchronous counters remain the same

ripple counter remains the same but that of synchronous counter increases

⇒ A series resonant circuit has R = 10 Ω, L = 1 μH and C = 1 mF. If R is increased to 20 Ω the resonant frequency

increases

decreases

remains constant

may increases or decreases

⇒ If P = 250 W and p.f. = 0.707 lagging, Q =

250 vars

- 250 vars

176.7 vars

- 176.75 vars

⇒ The household radio receiver uses

synchronous

envelope detector

radio detector

none of the above

⇒ If the operating temperature increases by 10°C, the rate of deterioration of solid dielectric becomes

double

one and a half time

3 times

4 times

⇒ In a single phase power factor meter the phase difference between currents in the two pressure coils is

exactly 0°

approximate 0°

exactly 90°

approximate 90°

⇒ In a television transmitter, the output stage is most likely to be

screen modulated class C amplifier

plate modulated class C amplifier

grid modulated class A amplifier

grid modulated class C amplifier

⇒ SWR for a transmission line is infinity when the load is

- Short circuit
- Complex impedance
- Open circuit
- Pure reactance

1, 3, 4 are correct

1 and 3 are correct

2, 3, 4 are correct

1, 2, 4 are correct

⇒ In figure, the current through 10 V batter

0

0.5 A charging

0.5 A discharging

none of the above

⇒ In 8085 microprocessor, what is the memory address stored on the stack, when the program is interrup

0210 H

0.211 H

0118 H

020 FH

⇒ Which of the following is the main advantage of PCM system?

Lower noise

Lower power

Lower bandwidth

All of the above

⇒ A parallel plate capacitor has its length, width and separation doubled. It fringing effects are neglected, to keep the capacitance same, the dielectric constant must be

halved

kept the same

doubled

made 4 times

⇒ The input differential stage of op-amp. 741 is baised at about 10 μA current such a low current of the input stage gives

- high CMRR
- high differential gain
- low differential
- high input impedance

1 and 2

1, 2 and 4

3 and 4

1, 2, 3 and 4

⇒ For a transistor to have-a larger β it must have and a

close to zero

close to 0.5

close to unity

nearly infinite

⇒ Which of the following produces very wide drifts in clock frequency?

Crystal

RC circuit

LC resonant circuit

Crystal and RC circuit

⇒ Fourier transform of signal obtained after taking difference between step function and its reverse version is given as __________ .

2

*j*ω

2/

*j*ω

4/

*j*ω

4

*j*ω

⇒ Consider the following statements about DRAM

- Page mode read operation is faster than RAS read
- RAS input remains active during column address strobe
- The row and column addresses are strobed into the internal buffers using RAS and CAS inputs respectively

1 and 3 only

All

1 and 2 only

2 and 3 only

⇒ In 8085 stack pointer is

4 bit register

8 bit register

16 bit register

32 bit register

⇒ An ac tachometer has a drag cup construction so that

rotor inertia is low

rotor body is conducting

rotor is easy to fabricate

both (a) and (b)

⇒ Radar is essentially an echo ranging system

TRUE

FALSE