Q1. | Both X and Y plates of a CRO are excited by ac signals. The display is an ellipse which makes one rotation in 5 seconds. This means that |

A. | the frequency of one input is 5 times that of other [Wrong Answer] |

B. | the difference between the frequencies of the two signals is one fifth of hertz [Correct Answer] |

C. | the difference between the frequencies of the two signals is 5 Hz [Wrong Answer] |

D. | either (a) or (c) [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 :**

⇒ When signed numbers are used in binary arithmetic, which of the following has unique representation for zero?

Sign-magnitude

1's complement

2's complement

9's complement

⇒ In a differential amplifier, CMRR can be improved by using an increased

emitter resistance

collector resistance

power supply voltages

source resistance

⇒ Consider the following statements about loop antenna

- It is suitable for direction finding application
- It is a single turn or multiturn coil carrying RF current
- The loop is surrounded by a magnetic field everywhere perpendicular to the loop

1 and 2 only

1 only

1, 2, 3

2 and 3 only

⇒ The channel of JFET consists of

*p*type material only

*n*type material only

conducting material

either

*p*or

*n*type material

⇒ In intrinsic semiconductor the increase in conductivity per degree increase in temperature is about

0.02

0.06

0.15

0.25

⇒ Spontaneous magnetisation is characteristic of ferromagnetic materials.

TRUE

FALSE

⇒ A dipole antenna was radiating with some excitation in free space radiating a certain amount of the power. If this antenna is immersed in a lake where water is non-dissipative but has a dielectric constant of 81, the radiated power with the same excitation will

decrease to finite non-zero value

remain the same

increase

decrease to zero

⇒ A single-sideband (SSB) signal contains 3 kW. The power content of the carrier is __________ kW.

2

2

3

0

⇒ In the given figure shows a root locus plot. Consider the following statements for this plot

- The open loop system is a second order system
- The system is overdamped for K > 1
- The system is stable for all values of K

1, 2, 3

1, 3

2, 3

1, 2

⇒ The voltage

*e*

_{o}indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calcula

Bias current of inverting input only

Bias current of inverting and non-inverting inputs only

Input offset current only

Both the bias currents and the I/P offset current

⇒ If zeros at infinity are included in the count, the number of zeros of G(

*s*) H(

*s*) is

equal to number of poles

one more than the number of poles

one less than the number of poles

none of the above

⇒ If V = 4 in the figure, the value of I

_{s}is give

0.25

5/2 A

0

none

⇒ The more negative gate voltage, the conductive channel becomes

narrower

wider

thicker

linear

⇒

*i*

_{1}(

*t*) for

*t*> 0 is give

2.5 - 2.5

*e*

^{-2t}

2.5 - 1.25

*e*

^{-2t}

1.25 - 1.25

*e*

^{-2t}

None of these

⇒ The frequency of the driving network connected between pins 1 and 2 of a 8085 chip must be

equal to the desired clock frequency

twice the desired clock frequency

four times the desired clock frequency

eight times the desired clock frequency

⇒

**Assertion (A):** If a carrier is modulated by three sine waves and *m*_{1}, *m*_{2}, *m*_{3} are the modulation indices, the total modulation index *m*_{t}

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 but R is wrong

A is wrong but R is correct

⇒ Which of the following statements are executable in FORTRAN 77?

Arithmetic IF

Assign

Call

All of the above

⇒ The number of comparator circuits required to build a three-bit simultaneous A/D converter is

7

8

15

16

⇒ The range of RTD using platinum is about

-100° C to 700°C

-200°C to 1000°C

100°C to 1000°C

about 500°C

⇒ An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is

0.02

0.025

0.04

0.05

⇒ When narrow current pulses drive a high Q resonant circuit the voltage across the circuit looks like

narrow pulses

half sine wave

almost sine wave

either (a) or (b)

⇒ The inductance of connecting leads can be a source of

low frequency parasitics

high frequency parasitics

carrier frequency parasitics

none of the above

⇒ A signal *f*(*t*) = cos 10p*t* + 3 cos 4p*t* is instantaneously sampled. The maximum allowable value of sampling interval T_{s} in sec is

1 / 4 sec

1 / 8 sec

1 / 8p sec

1 / 10 sec

⇒ In a series L-C circuit fed by ac voltage, voltage drops across L and C are 40 V and 30 V respectively. The supply voltage is

70 V

10 V

50 V

1.333 V

⇒ A Wien bridge oscillator uses Wien bridge for

tuning and phase shift

tuning

phase shift

either tuning or phase shift

⇒ δ(*t*) is a

energy signal

power signal

neither energy nor power

none

⇒ A diode detector load consists of 0.01 μF capacitor in parallel with a 5 *k ohms* resistor. The maximum depth of modulation without diagonal clipping at modulating frequency of 1000 H*z* and 10 kH*z* is

0.76, 0.24

0.95, 0.3

0.24, 0.76

0.3, 0.95

⇒ Advanced low power Schottky is a part of

ECL family

CMOS family

TTL family

none of the above

⇒ Ferromagnetic materials show hysteresis in B - H characteristic. As the magnetic field in increased slowly from zero value, what is the first process which sets the material to give net magnetization?

Growth of favourably oriented domains at the cost of other domains by reversible boundary displacements

Growth of favourably oriented domains at the cost of other domains by irreversible boundary displacements

Domain wall orientation

A combination of processes (a) and (c) above

⇒ In the given figure the reflection coefficient at source en

1

-1

42738

-1/3