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. | A sinusoidal signal is measured by CRO. The scale is set at 4 mV/cm. If vertical distance between positive and negative peaks is 6 cm, the peak value of ac signal is |

A. | 6 mV [Wrong Answer] |

B. | 12 mV [Correct Answer] |

C. | 24 mV [Wrong Answer] |

D. | 3 mV [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 :**

⇒ In a microwave resistor the wall thickness is made as small as possible to

have high value of R

have low value of R

minimize capacitive effect

reduce inductance

⇒ The stack pointer holds the address of the desired memory location.

TRUE

FALSE

⇒ Class-B amplifier has less efficiency compared to

class A

class B

class C

class A, AB and C

⇒ The time required for horizontal blanking is 16% of that for each horizontal line. If horizontal time is 63.5 μs, the horizontal blanking time for each line is about

1 μs

10 μs

100 μs

none of the above

⇒ In elemental dielectrics, the orientation and ionic polarization are absent.

TRUE

FALSE

⇒

**Assertion (A):** The equation D = ∈_{0}∈_{r}E is applicable only to isotropic materials.

**Reason (R):** In polycrystalline materials, the directional effects are absent.

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 line of sight communication requires the transmit and receive antennas to face each other. If the transmit antenna is vertically polarized, for best reception to the receive antenna should be

horizontally polarized

vertically polarized

at 45° within respect to horizontal polarization

at 45° with respect to vertical polarization

⇒ The symbol in figure is

SUS

SBS

Shockley diode

UJT

⇒ In a RL circuit, the angle, θ by which the current lags the voltage is

0 > θ > - 90°

90°

0°

0 < θ < 90°

⇒ Satellite launch sites are invariably located on Eastern seaboards to ensure that

launch takes place eastward

expenditure of propulsion fuel is reduced during plane changing

the satellite achieves circular orbit quickly

spent rocket motor and other launcher debris falls into the sea

⇒ DeMorgan's first theorem is =

A . A = 0

A = A

A + B = A . B

AB = A + B

⇒ The Hilbert transform of cos ω

_{1}

*t*+ sin ω

_{2}

*t*is

sin ω

_{1}

*t*+ cos ω

_{2}

*t*

sin ω

_{1}

*t*- cos ω

_{2}

*t*

cos ω

_{1}

*t*- cos ω

_{2}

*t*

sin ω

_{1}

*t*+ sin ω

_{2}

*t*

⇒ If

*v*(

*t*) = 0 for

*t*< 0 and

*e*

^{-at}for

*t*≥ 0 V(

*j*ω) = 1/(a +

*j*ω).

TRUE

FALSE

⇒ In van der walls crystals, there exists a high degree of stability of the outer electron shell.

TRUE

FALSE

⇒ For a circular wave guide

cutoff frequency for TE

_{10}and TE

_{01}modes are same

cutoff frequency for TE

_{10}and TE

_{01}modes are different

cutoff frequency for TE

_{10}mode = twice the cutoff frequency for TE

_{20}mode

cutoff frequency for TE

_{10}mode = haf the cutoff frequency for TE

_{20}mode

⇒ Induction wattmeter can be used in

ac circuit only

dc circuit only

both ac and dc circuit

ac 3 phase only

⇒ 6 bytes means

6 bits

24 bits

48 bits

96 bits

⇒ Absolute instruments are used in

laboratories

industries

power houses

standard laboratories

⇒ A (75 -

*J*50) ohm load is connected to a coaxial of Z

_{0}= 75 ohm at 10 GHz. The best method of matching is to connect

an inductance at load

a short circuited stub at load

a short circuited stub at specific distance from load

a capacitance at specific distance from load

⇒ Find the value of

*i*if each resistance is of 3 Ω and each battery is of

_{x}1.1428 V

1.432 A

0.2892 A

O A

⇒ The term critical frequency denotes

the lowest frequency that is reflected by the ionosphere

the highest frequency that is reflected by the ionosphere at vertical distance

the lowest frequency by which communication is possible between two given points

none of the above

⇒ It is required to measure the true open circuit emf of a battery. The best device is

dc voltmeter

ammeter and known resistance

dc potentiometer

either (a) or (c)

⇒ If

*f*(

_{h}*t*) is the Hilbert transform of

*f*(

*t*), and

*f*(

*t*) is a real valued signal, the pre-envelope of

*f*(

*t*) is

*f*(

*t*) -

*jf*(

_{h}*t*)

*f*(

*t*) +

*jf*(

_{h}*t*)

*f*(

_{h}*t*) +

*jf*(

*t*)

*f*(

_{h}*t*) -

*jf*(

*t*)

⇒

**Assertion (A):** In a common source amplifier with source terminal at ac ground the voltage gain is about *g*_{m} *r*_{d}

**Reason (R):** A common source amplifier is a source follower circuit

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ Consider the following statements about polar plots

- Addition of a non-zero pole to a transfer function results in further rotation of polar plot through an angle of - 90° as ω → ∞
- Addition of a pole at the origin to a transfer function rotates the polar plot at zero and infinite frequencies by a further angle of - 90°

Both are correct

Both are wrong

1 is correct and 2 is wrong

2 is correct and 1 is wrong

⇒ Efficiency of a half wave diode rectifier is less than 40%.

TRUE

FALSE

⇒ When a coil consisting of single turn rotates at a uniform speed in a magnetic field, the induced e.m.f. is

changing

reversing

steady

alternating

⇒ A rectangular waveguide of internal dimensions (

*a*= 4 cm and

*b*= 3) is to be operated in TE

_{11}mode. The minimum operating frequency is

6.25 GHz

6.0 GHz

5.0 GHz

3.75 GHz

⇒ A noise can be represented as superposition of spectral components. When this noise is passed through a narrow band filter, the output of filter should look like

sinusoidal

rectangular

triangular

none of the above

⇒ For the factor (1 + 0.5

*j*ω) the corner frequency is

1 rad/sec

0.5 rad/sec

2 rad/sec

0.25 rad/sec