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Q1. | In the circuit of figure the current through 5 Ω resistance at t = 0^{+} |

A. | 0 [Wrong Answer] |

B. | 0.416666666666667 [Wrong Answer] |

C. | 6.67 A [Correct Answer] |

D. | 5.1 A [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ The MOSFET is almost ideal as a switching device because

it has linear characteristics

it works progressively

it consumes low power

it has longer life

⇒ Consider the following statement: In case of a superconductor

- B = 0
- μ
_{r}is high - diamagnetism is high
- transition temperature varies with isotopic mass.

1 and 2 are correct

2, 3, 4 are correct

1, 3, 4 are correct

2, 4 are correct

⇒ The decimal equivalent of the binary number 10110.0101011101 is

22.24082165

22.340821675

22.3408213125

22.3408203125

⇒ If 1.5% of the output of an amplifier is feedback positively to the input, the minimum gain required of the amplifier for oscillations to occur, is

16.6

44.4

66.6

75

⇒ From an

*n*channel JFET for V

_{DS}constant and if V

_{GS}is made more negative, pinch off would occur at

higher value of drain current

saturation value of drain current

zero drain current

gate current equal to drain current

⇒ An

*m*derived low pass filter has

*f*

_{c}= 1000 Hz,

*f*

_{∞}= 1250 Hz and

*m*= 0.6. If

*m*is increased, then

both

*f*

_{c}and

*f*

_{∞}will increase

both

*f*

_{c}and

*f*

_{∞}will decrease

*f*

_{c}will remain constant but

*f*

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*f*

_{c}will remain constant but

*f*

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⇒ Measurement of Hall coefficient enables the determination of

mobility of charge carriers

type of the conductivity and concentration of charge carriers

temperature coefficient and thermal conductivity

fermi level and forbidden energy gap

⇒ If a RAM has 34 bits in its MAR and 16 bits in its MDR, then its capacity will be

32 GB

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32 MB

16 MB

⇒ A hollow rectangular waveguide has dimensions

*a*= 2

*b*. Calculate the amount of attenuation, if the frequency is 3 GHz, and

*b*= 1 cm.

49

47.33

50.33

50

⇒ If D, G and η denote the directly, power gain and efficiency of an antenna, then which of the following relation holds :

DGη = 1

η = DG

D = ηG

D = G/η

⇒ The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE

_{10}mode is

equal to its group velocity

less than the velocity of light in free space

equal to the velocity of light in free space

greater than the velocity of light in free space

⇒ Surface integral of the electric field intensity is

differential of volume flux

electrical charge

net flux emanating from the surface

none of the above

⇒ When a TTL is driving an CMOS gates it is necessary to ensure that

V

_{OL}(for TTL) ≤ V

_{IL}(for CMOS) and V

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V

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_{IL}(for CMOS)

V

_{0H}(for TTL) ≤ V

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V

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⇒ A dc network has an open circuit voltage of 5 V. When its terminals are short circuited a current of 5 A flows through the short circuit. If the short circuit is removed and a resistance of 1.5 Ω is connected across its terminals, the current will be

0.0416666666666667

0.0833333333333333

2.5 A

0.208333333333333

⇒ A capacitor used for power factor correction is single phase circuit decreases

power factor

line current

both line current and p.f.

the line current and increases p.f.

⇒ In a two phase servomotor the voltages applied to the two stator windings

are equal in magnitude and are in phase

are unequal in magnitude but are in phase

are equal in magnitude but have a phase difference of 90°

are unequal in magnitude and have a phase difference of 90°

⇒ A 12 bit ADC is operating with 1 μs clock period. Total conversion time is 14 μs. ADC is

flash type

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integrating type

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⇒ In which configuration does output ac voltage appear between emitter and ground?

CE

CB

CC

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⇒ Electrons within a metal have energy levels from zero to Fermi level E

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FALSE

⇒ In microwave system the function of mode filter is

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to suppress modes with higher cut off frequencies

to change mode of wave transmission

both (b) and (c)

⇒ In floating point number 0110100000010101, the exponent is equal to __________

_{10}

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10

-10

⇒ In an integral controller

the output is proportional to input

the rate of change of output is proportional to input

the output is proportional to rate of change of input

none of the above

⇒

**Assertion (A):** In Darlington pair, the overall β is product of individual β_{s}

**Reason (R):** The voltage gain of a base driven amplifier is equal to ac collector voltage divided by ac base voltage

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

⇒

Match the following:

List I (Diode Rectifier) | List II (Efficiency is R_{f}/R_{L} = 0.25) | ||
---|---|---|---|

A. | Half wave | 1. | 0.54 |

B. | Bridge Rectifier | 2. | 0.65 |

C. | Full wave using tapped centre transformer | 3. | 0.325 |

A-1, B-2, C-3

A-2, B-1, C-3

A-3, B-2, C-1

A-3, B-1, C-2

⇒

**Assertion (A):** FET has characteristics very similar to that of pentode.

**Reason (R):** Both FET and pentode are voltage controlled devices.

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

⇒ Which of the following statement is incorrect?

Z

_{0}is an ac characteristic that is the same for any length of time

The characteristic impedance can be measured approximately with a sensitive ohm meter

A line terminated in its Z

_{0}is a flat or non-resonant line

A twin lead has higher Z

_{0}but lower losses than coaxial cable

⇒ If A = 3 +

*j*1 and B = 4 +

*j*3, A + B =

7 ∠45°

10 ∠45°

8.062 ∠29.7°

8.062 ∠73°

⇒ Thermistor has a positive temperature coefficient.

TRUE

FALSE

⇒ A conductor in

*x-y*plane and having length 1 m is moving with a velocity V = (2

*i*+ 3

*j*+

*k*) m/sec. A magnetic induction field B = (

*i*+ 2

*j*) Wb/m

^{2}is applied to the conductor. The potential difference between the ends of the conductor is

0

4.88 V

6 V

None of these

⇒ A 10 μF capacitor is charged from a 5 volt source through a resistance of 10 kΩ. The charging current offer 35 m sec. If the initial voltage on C is - 3 V is

0.56 mA

5.6 mA

6 mA

5 μA