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Q1. | The numbers of accelerating anodes in a CRO is |

A. | 1 [Wrong Answer] |

B. | 2 [Correct Answer] |

C. | 3 [Wrong Answer] |

D. | 4 [Wrong Answer] |

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

⇒ When the modulating frequency is doubled, the modulation index is halved and the modulating voltage remains constant. The modulation system is

FM

AM

phase modulation

none of the above

⇒ The signal m(

*t*) = 10 cos 100 p

*t*is sampled at the rate of F

_{s}= 75 H

_{z, }then determine signal after sampling.

4 cos 100 p

*t*+ 8 sin 200 p

*t*

4 cos 100 p

*t*+ 8 sin 200 p

*t*+ cos 75 p

*t*

4 cos 25 p

*t*+ 8 sin 50 p

*t*+ cos 75 p

*t*

none

⇒ For the current wave

*i*= 10 + 10 sin θ, the rms value is

0.416666666666667

12.247 A

20 A

14.14 A

⇒ Consider the follo

1 and 2

1 and 3

1, 2 and 3

2 and 3

⇒ The band gap of silicon at 300K is

1.36 eV

1.10 eV

0.80 eV

0.67 eV

⇒ A 16 x 8 ROM stores these words in its first four locations, as given below. Which of this represents 3 CH in hexadecimal?

R

_{0}= 1110 0010

R

_{1}= 0101 0111

R

_{2}= 0011 1100

R

_{3}= 1011 1111

⇒ For a junction FET in the pinch off region as the drain voltage is increased, the drain current

becomes zero

abruptly decreases

abruptly increases

remains constant

⇒ In low pass filter of figure R

_{0}= 1 Ω and cut off frequency is 1 rad/sec. The values of L and C

1 H and 2 F

1 H and 1 F

2 H and 1 F

1 H and 2 F

⇒ For a low level AM system, the amplifiers modulated stage must be

linear devices

harmonic devices

class C amplifiers

non-linear devices

⇒ 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

⇒ The number of bits in EBCDIC is

12

10

8

6

⇒ The Boolean function realized by the logic circuit show

F = Σ

*m*(0, 1, 3, 5, 9, 10, 14)

F = Σ

*m*(2, 3, 5, 7, 8, 12, 13)

F = Σ

*m*(1, 2, 4, 5, 11, 14, 15)

F = Σ

*m*(2, 3, 5, 7, 8, 9, 12)

⇒ Which of the following represents a stable system?

- Impulse response decreases exponentially.
- Area within the impulse response in finite.
- Eigen values of the system are positive and real.
- Roots of the characteristic equation of the system are real and positive.

1 and 4

1 and 3

2, 3 and 4

1, 2

⇒ Dual slope ADC uses an op amp comparator.

TRUE

FALSE

⇒ In the circuit of figure, the switch is closed at

*t*= 0 with

*i*

_{L}(0) = 0 and V

_{C}(0) = 0. In the steady state n

_{c}equ

100

*v*

0

*v*

∞

- 100

*v*

⇒ Which colour picture tube uses slotted aperture mask?

Trinitron

Shadow mask tube

PIL

None of the above

⇒ Which configuration is suitable for impedance matching?

CB

CE

CC

CB and CE

⇒ A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of

Kirchoff's laws

Superposition theorem

Thevenin's theorem

Tellegen's theorem

⇒ Which of the following is best excited from a waveguide?

Discone

Helical

Biconical

Horn

⇒ A pulse train with a 1 MHz frequency is counted using a 1024 modulus ripple counter using JK flip flops. The maximum propagation delay for each flip-flop should be

1 μs

0.5 μs

0.2 μs

0.1 μs

⇒ How many zone bits are th

2

4

8

16

⇒ A silicon (PN) junction at a temperature of 20°C has a reverse saturation current of 10 pico Ampere. The reverse saturation current at 40°C for the same bias is approximately.

30 pA

40 pA

50 pA

60 pA

⇒ The log magnitude curve of factor

*j*ω is a straight line having a slope of 20 dB/decade.

TRUE

FALSE

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | On-off | 1. | steam kettle with different settings |

B. | Proportional | 2. | Elevator |

C. | Cascade | 3. | Robot-positioning |

D. | Digital | 4. | Domestic Refrigerator |

A-4, B-2, C-3, D-1

A-2, B-4, C-1, D-3

A-3, B-1, C-4, D-2

A-4, B-2, C-1, D-3

⇒

**Assertion (A):** The velocity of electromagnetic waves on overhead lines and coaxial cables is the same.

**Reason (R):** Free space has an intrinsic impedance of 377 ohms.

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

⇒ If A is 1011, A" is

1011

100

1100

1010

⇒ The phase of colour subcarrier burst in PAL is along the axis at

+180°

-180°

±180°

±45°

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

TRUE

FALSE

⇒ The circuit of figure is generally employed

bridge

low-pass filter

peaking network

high-pass filter

⇒ Which of the following devices is used in the microprocessors?

JFET

BJT

MOSFET

CMOS