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Q1. | Basically a potentiometer is a device for |

A. | comparing two votage [Correct Answer] |

B. | measuring a voltage [Wrong Answer] |

C. | comparing two currents [Wrong Answer] |

D. | measuring a current [Wrong Answer] |

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

⇒ A half wave diode rectifier and full wave diode bridge rectifier both have an input frequency of 50 Hz. The frequencies of outputs respectively are

100 Hz and 50 Hz

50 Hz and 100 Hz

100 Hz each

50 Hz each

⇒ The accuracy of an instrument is determined by

closeness of indicated value to the actual value

repeatability of measured value

speed with which the reading approaches final value

least value which can be measured

⇒ Which among the following waveforms can be reconstructed from its samples without distort

1 and 2

2 and 3

1 and 3

Only 2

⇒ The log magnitude curve for a constant gain K is a

horizontal straight line

horizontal straight line of magnitude 20 log K decibels

an inclined line having slope K

an inclined line having slope -K

⇒ Find the Fourier transform of the half cosine pulse as shown bel

0.5 {sin

*c*[0.25(

*f*- 1)] + sin

*c*[2.5(

*f*+ 1)]}

0.5 {sin

*c*[0.5(

*f*- 1)] + sin

*c*[0.5(

*f*+ 1)]}

0.25 {sin

*c*[0.25(

*f*- 1)] + sin

*c*[0.25 (

*f*- 1)]}

0.25 {sin

*c*[0.5(

*f*- 1)] + sin

*c*[0.5(

*f*- 1)]}

⇒

**Assertion (A):** The polynomial *s*^{3} + 6*s*^{2} + 12*s* + 8 is Hurwitz.

**Reason (R):** In a Hurwitz polynomial all coefficients are non-negative.

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

⇒ The use of coaxial microwave line should be restricted to frequencies

below cut off frequency of TE

_{11}mode

above cut off frequency of TE

_{11}mode

at frequencies much lower than cut off frequency of TE

_{11}mode

at frequencies much higher than cut off frequency of TE

_{11}mode

⇒ If a microcomputer has a 64 K memory; what is the hexadecimal notations for the first memory location?

AAAA

FFFF

AAA0

0

⇒ In a complex wave, the negative half of the wave is a reproduction of the positive half wave. Then

the wave contains only fundamental and third harmonic

the wave does not contain even harmonics

the wave does not contain odd harmonics

the wave does not contain triple harmonics

⇒ The current wave of figure, is passed through a 3 H inductor during the period 0 to 2 sec

is 3 V

is 6 V

increases from 0 at

*t*= 0 to 6 V at

*t*= 2 seconds

increases from 0 at

*t*= 0 to 6 V at

*t*= 2 seconds and then decreases

⇒ If resistance is 20 Ω and inductance is 2 H in a R-L series circuit, then time constant of this will be

0.001

*s*

0.1

*s*

10

*s*

100

*s*

⇒ The equation sin (

*z*) = 10 has

no real or complex solution

exactly two distinct complex solutions

a unique solution

an infinite number of complex solutions

⇒ In a metal the probability of a state 0.1 eV below Fermi level being occupied

is more than the probability of state 0.1 eV above Fermi level being occupied

is the same as the probability of state 0.1 eV above Fermi level being occupied

is less than the probability of state 0.1 eV above Fermi level being occupied

may be equal to or more or less than the probability of state 0.1 eV above Fermi level being occupied

⇒ An RL impedance function is to be synthesised in second Foster form. The proper function to be expanded is

Z(

*s*)

*s*Z(

*s*)

1/Z(

*s*)

Z(

*s*)/

*s*

⇒ It is desired to route data from many registers to one register. The device needed is

decoder

multiplexer

demultiplexer

counter

⇒ The attenuation in waveguides near the cut off frequency is

very low

very high

medium

zero

⇒ A full wave bridge rectifier is supplied voltage at 50 Hz. The lowest ripple frequency will be

400 Hz

200 Hz

100 Hz

50 Hz

⇒ In 8085

all operations are on 8 bit data

majority of operations are on 8 bit data

all operations are on 8 bit or 4 bit data

either (a) or (c)

⇒ In the saturation region of CE output characteristics of

*n*-

*p*-

*n*transistor, V

_{CE}is about

0.5 V

15 V

- 0.5 V

- 15 V

⇒ An SBS can conduct is one direction only.

TRUE

FALSE

⇒ In the circuit of figure, Thevenin's resistance is 10 &

25 Ω

10 Ω

13.33 Ω

6 Ω

⇒ In order to receive a vertically polarized wave, the conductor of the dipole should be mounted

horizontally

vertically

at an angle of 45°

none of the above

⇒ Find R

_{AB2 Ω1.5 Ω3 ΩNone of the above}

⇒ In the given figure shows a 4 bit serial in parallel out right shift register. The initial contents as shown are 0110. After 3 clock pulses the contents wil

0

101

1010

1111

⇒ In a superheterodyne receiver, the IF is 455 kHz. If it is tuned to 1200 kHz, the image frequency will be

1655 kHz

2110 kHz

745 kHz

910 kHz

⇒ Which one of the following cannot be used to remove the unwanted sideband in SSB?

Balanced modulator

Phase shift method

Filter system

Third method

⇒ Which of the following number specification refers to FET with one gate?

2N

3N

3Y

3X

⇒ What kind of signal does the times produce?

Single pulse

Square wave

Continuous pulse

No signal

⇒ 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°

⇒ Adder is a combinational logic circuit.

TRUE

FALSE