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. | In a CRO, the frequency of output of time base generator |

A. | is only one constant value [Wrong Answer] |

B. | is adjustable [Correct Answer] |

C. | varies automatically [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 :**

⇒ Which of the following circuit has the greatest bandwidth?

*f*

_{r}= 455 MHz; Q = 10

*f*

_{r}= 455 MHz; Q = 100

*f*

_{r}= 1 MHz; Q = 100

*f*

_{r}= 1 MHz; Q = 10

⇒ In an ac network the sum of currents entering a node is 10 ∠45°. The sum of currents leaving the node is

19.32 ∠45°

15 ∠45°

20 ∠45°

zero

⇒ In plotting line spectrum

a graph of complex number F

_{n}versus frequency is plotted

a graph of |F

_{n}| versus frequency is plotted

a graph of the angle of F

_{n}versus frequency is plotted

two graphs viz |F

_{n}| versus frequency and the phase angle of F

*n*versus frequency are plotted

⇒

Match the following:

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

A. | Laser | 1. | Emits monochromatic light of low intensity |

B. | Solar cell | 2. | Consumes electrical power due to incident light |

C. | Photodiode | 3. | Delivers power to a load |

D. | LED | 4. | Emits monochromatic light of high intensity |

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

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

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

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

⇒ Two sinusoidal voltage sources

*v*

_{1}= 50 sin (100

*t*) and

*v*

_{1}= 50 sin (100

*t*+ p) are connected in parallel and fed an inductance X

_{L}= 2Ω. The cuirent through X

_{L}is

25 A

about 17.5 A

zero

50 A

⇒ Which of the following is used for generating time varying wave forms?

MOSFET

PIN diode

Tunnel diode

UJT

⇒

*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

⇒ In the circuit, the value of the voltage sour

-22 V

-12 V

+12 V

-10 V

⇒ A wire has a diameter

*d*and resistance R. If the diameter is made 3

*d*, the length and material remaining the same, the new value of resistance will be

R/3

3 R

R/9

9 R

⇒ A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the duty cycle is likely to be

0.9

0.8

0.75

0.6

⇒ If sound intensity is 8 W/m

^{2}, the dB level of this sound is about

5 dB

50 dB

129 dB

1290 dB

⇒ For the control system in the given figure, the value of K for critical dampin

1

5.125

6.831

10

⇒ The units of resistivity are ohm-metre.

TRUE

FALSE

⇒ A meter has a square law scale. For 2 A current the deflection in 90°. For a deflection of 45°, the current is

0.0416666666666667

1.5 A

1.414 A

1.61 A

⇒ 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

⇒ For a Gaussian process, auto-correlation sequence also implies that

statistical independence

statistical dependence

ergodic process

all

⇒ Adder is a combinational logic circuit.

TRUE

FALSE

⇒ A counter has N flip flops. The total number of states are

N

2 N

2

^{N}

4 N

⇒ Which of the following is true in a tape recorder?

Vow is due to variation in motor speed but flutter is due to some other reason

Both vow and flutter are due to variations in motor speed

Flutter is due to variation in motor speed but vow is due to some other reason

Neither vow nor flutter is due to variation in motor speed

⇒ Nyquist stability criterion uses open loop frequency response characteristics.

TRUE

FALSE

⇒ Consider the following statements as regards pulse repetition frequency

- Pulse interval should be as large as possible so that a pulse returns before next pulse is transmitted
- Greater the number of pulses reflected from a target, greater is the probability of distinguishing it from the noise

1 only

2 only

both 1 and 2

neither 1 nor 2

⇒ Transistor are free from which type of noise?

Resistance noise

Partition noise

Flicker noise

Shot noise

⇒ At frequencies of 10 MHz and higher the impedance represented by ground is primarity

resistive

inductive

capacitive

partly resistive and partly capacitive

⇒ A two terminal black box contains one of the elements R, L, C. The black box is connected to 220 V as supply. The current is I, when a capacitance of 0.1 F is connected in series between the source and box, the current is 2I. The elements is

resistance

inductance

capacitance of 0.5 F

not identifiable form the given data

⇒ In a digital counter the number of flip-flops is

always 2

always even

always odd

equal to the number of bits required in the final binary count

⇒ A 4 bit synchronous counter uses flip flops with a delay time of 15 ns each. The time required for change of state is

15 ns

30 ns

45 ns

60 ns

⇒ Which has the highest power dissipation per gate?

ECL

TTL

CMOS

PMOS

⇒ The rotation of direction of E field of a linearly polarized wave passing through a magnetised ferric medium is called

Lorentz rotation

Faraday rotation

Steinmitz rotation

Fleming's rotation

⇒ The antenna current of an AM broad cast transmitter, modulated to a depth of 40% by an audio sine wave is 11 amperes. It increased to 12 ampere as a result of simultaneous modulation by another sine wave. The modulation index due to this second sine wave is :

0.4

0.757

0.643

0.8

⇒ Which of the following is not a key word in C?

pop

for

if

union