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Q1. | The minimum height of outer atmosphere is |

A. | 100 km [Wrong Answer] |

B. | 150 km [Wrong Answer] |

C. | 200 km [Wrong Answer] |

D. | 400 km [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 :**

⇒ A step voltages is applied to RLC series circuit having R = 2 Ω, L = 1 H and C = 1 F. The transient current response will be

over damped

critically damped

under damped

any of the above depending the magnitude of voltage

⇒ A system has its two poles on the negative real axis and one pair of poles lies on

*j*ω axis. The system is

stable

unstable

limitedly stable

either (a) or (c)

⇒ In figure I

_{D}= 4 mA. Then V

_{S20 V4.4 V0.4 V0.44 V}

⇒

**Assertion (A):** FET is a unipolar device.

**Reason (R):** BJT is bipolar device.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not a correct explanation of A

A is true but R is false

A is false but R is true

⇒ A single phase semiconverter is feeding a highly inductive load. The circuit has a freewheeling diode across the load and firing angle is a. During one cycle of input voltage, the total duration of conduction of freewheeling diode is

a

2 a

4 a

0.5 a

⇒ The storage capacity of audio CD is 540 Mb per side.

TRUE

FALSE

⇒ In figure, the current supplied by battery immediately after switching on the circui

0.0416666666666667

0.166666666666667

0.416666666666667

0

⇒

**Assertion (A):** The time response, usually, is slower with lag compensation.

**Reason (R):** The natural undamped frequency and bandwidth are increased.

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

R is correct but A is wrong

⇒ Which of the statement is correct?

*h*and

*g*matrices are inverse of each other

*z*and

*y*matrices are inverse of each other

for reciprocal networks AD - BC = 1

ABCD parameters are used in transistor circuit

⇒ An SR flip flop can be built using NOR gates or NAND gates.

TRUE

FALSE

⇒ Which of the following will increase the antenna radiation efficiency?

Use of larger section of conductor

Providing insulation on conductor

Top loading of antenna

Any of the above

⇒

Match the following:

List I (F.T and F.S) | List II (Properties) | ||
---|---|---|---|

A. | Fourier Series | 1. | Discrete, Periodic |

B. | Fourier Transform | 2. | Continuous, Periodic |

C. | Discrete Time Fourier | 3. | Discrete aperiodic |

D. | Discrete Fourier Transform | 4. | Continuous, aperiodic |

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

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

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

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

⇒ Algebraic expression for

*z*-transform of

*x*[

*n*] is X[

*z*]... What is the algebraic expression of

*z*-transform of

*e*

^{jω0n}

*x*[

*n*]?

X(Z - Z

_{0})

X(

*e*

^{-jW0z})

X(

*e*

^{jω0z})

X(Z)

^{jω0z}

⇒ 25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both hockey and football. Then the number of persons playing neither hockey nor football is:

2

17

13

3

⇒ Consider the following statements

- Bunching of electrons occurs in two cavity klystron amplifier.
- Bunching of electrons occurs in multi cavity klystron amplifier.
- Bunching of electrons occurs in reflex cavity klystron amplifier.

1, 2, and only

1, 2 and 3 only

1 and 3 only

2 and 3 only

⇒ In a dual converter operated in circulating current mode, the circulating current flows

when load current is zero

when load current is non-zero

even when load current is zero

none of the above

⇒ For a BJT if β = 50, I

_{CEO}= 3 μA and I

_{C}= 1.2 mA then I

_{E}

1 mA

1.2 mA

1.3 mA

1.4 mA

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

linear devices

harmonic devices

class C amplifiers

non-linear devices

⇒ In a CE amplifier, the collector resistance is 6 kΩ and load resistance is 3 kΩ. The ac load resistance is

9 kΩ

6 kΩ

3 kΩ

2 kΩ

⇒ The diagram to show distance time history of electrons in klystron amplifier is called

apple gate diagram

asynchronous diagram

bunching diagram

velocity modulation diagram

⇒ In a series inverter

the commutating elements L and C are in parallel

the commutating elements L and C are in series with load

the commutating L and C may be in series or parallel with the load

none of the above

⇒ In the DRAM cell in the figure is the V

_{t}of the NMOSFET is 1 V. For the following three combinations of WL and BL volta

5 V, 3 V, 7 V

4 V, 3 V, 4 V

5 V, 5 V, 5 V

4 V, 4 V, 4 V

⇒ Unit doublet is the Laplace inverse of __________ .

1/

*s*

*s*

^{2}

*s*

none of these

⇒ An iron specimen has µ

_{r}= 1000 when B = 0.3 T. If B = 0.35 T, µ

_{r}

will be 1000

will be less than 1000

will be more than 1000

may be more or less than 1000

⇒ Consider the following stateme

1, 2, 3

1, 3, 4

2, 3, 4

1, 2, 4

⇒ A silicon controlled switch has :

2 leads

3 leads

4 leads

5 leads

⇒ The most common method for biasing a JFET is

reverse bias

self bias

voltage divider bias

none of the above

⇒ RC oscillator can be used upto

1 kHz

10 kHz

50 kHz

100 kHz

⇒ The dynamometer principle can be used for

ammeter only

voltmeter only

wattmeter only

ammeter, voltmeter and wattmeter

⇒ The minimum number of 2 input NAND gates required to implement Boolean function A B C is A, B, C are available is

2

3

5

6