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Q1. | Two similar coupled coils are connected in series. The total inductance in series aiding connection is 100 mH. If currents is 3 A, the energy stored in magnetic field is |

A. | 0.9 J [Wrong Answer] |

B. | 0.45 J [Wrong Answer] |

C. | 0.225 J [Correct Answer] |

D. | 1.8 J [Wrong Answer] |

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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 :**

⇒ What is the normal range of analog input voltage?

0 to 1 V

0 to 5 V

5 to 15 V

15V to 30V

⇒

Match the following:

List I (Digital circuit) | List II (Circuit type) | ||
---|---|---|---|

A. | BCD to 7 segment decoder | 1. | sequential circuit |

B. | 4-to-1 MUX | 2. | combinational circuit |

C. | 4 bit shift register | 3. | neither sequential nor combinational circuit |

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

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

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

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

⇒ Which of the following cannot be the Fourier series expansion of a periodic signal?

*x*(

*t*) = 2 cos

*t*+ 3 cos 3

*t*

*x*(

*t*) = 2 cos pt + 7 cos

*t*

*x*(

*t*) = cos

*t*+ 0.5

*x*(

*t*) = 2 cos 1.5p

*t*+ sin 3.5 p

*t*

⇒ It

*f*(

*t*) is an odd function, the coefficients F

*in the exponential form of Fourier series*

_{n}are real

are imaginary

are complex

may be real or imaginary

⇒ LVDT is a

pressure transducer

displacement transducer

velocity transducer

acceleration transducer

⇒ In an AM transmitter after the modulation stage, class C amplifier

can be used

cannot be used

may be used, but it has no use

can't be determine to use

⇒ A FET

has two P-N junctions

has three P-N junctions

depends on the variation of the depletion layer width with reverse voltage, for its operation

depends on the variation of a magnetic field for its operation

⇒ Logic pulser

generates short duration pulses

generates long duration pulses

generates sinusoidal voltage

generates ideal pulses

⇒ Positive feedback is mainly used in

oscillators

thyristors

voltage regulators

both (a) and (b)

⇒ In a TV, studio the function of vision switcher is to

edit television programs

relay television programs

control zoom lens

mix audio and video signals

⇒ Which one is a causal system?

*y*(

*n*) = 3

*x*[

*n*] - 2

*x*[

*n*- 1]

*y*(

*n*) = 3

*x*[

*n*] + 2

*x*[n + 1]

*y*(

*n*) = 3

*x*[

*n*+ 1] + 2

*x*[

*n*- 1]

*y*(

*n*) = 3

*x*[

*n*+ 1] 2

*x*[

*n*- 1] +

*x*[

*n*]

⇒ Which of the following is true as regards telephone systems?

A larger facility carrying a larger load operates less efficiently than a smaller capacity

A larger facility carrying a lesser load operates more efficiently than a smaller capacity

A larger facility carrying a larger load operates more efficiently than a smaller capacity

A smaller capacity carrying a larger load operates more efficiently than a larger capacity

⇒ Figure is a 24 V

_{r}stabilized power supply. The zener is 24 V, 600 mW. The minimum zener current is 10 mA. Proper values R and maximum load current

320 Ω, 10 mA

400 Ω, 15 mA

400 Ω, 10 mA

320 Ω, 15 mA

⇒ The correct relation between joules and calories is

calories = joules/4.156

joules = calories/4.156

calories = joules x 10

^{7}/4.156

joules = calories x 10

^{7}/4.156

⇒ For broadcasting purpose, full AM signal is preferred to SSB signal because

it requires large bandwidth

generation of full AM is easier

detection of full AM is simpler

none of the above

⇒ A dominant wave is characterised by which of the following?

No attenuation

Lowest cut off wavelength

Highest cut off wavelength

All of the above

⇒ A good dielectric should have

low losses

good heat conductivity

high intrinsic strength

all of the above

⇒ IC counters are

synchronous only

asynchronous only

both synchronous and asynchronous

none of the above

⇒ As the area of a public meeting increases the amplifier power output required increases.

TRUE

FALSE

⇒ In a single phase half wave converter feeding resistive load and full wave converter (M - 2 connection) feeding a resistive load the circuit conditions are similar. The firing angle is a. Then the waveshapes of voltages across thyristors

are similar

are not similar

may be similar or dissimilar

are similar only for some values of a

⇒ Decimal number 46 in excess 3 code =

1000 1001

0111 1001

0111 1111

1000 1111

⇒

Match the following:

List I (DOS commands) | List II (Meaning) | ||
---|---|---|---|

A. | DBLSPACE | 1. | Deletes a director and its sub-directories |

B. | MEM | 2. | Displays the amount of used and free memory |

C. | SYS | 3. | Put a copy of DOS on disk |

D. | DELTREE | 4. | Compresses files to increase the storage capacity of disc |

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

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

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

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

⇒ Which of the following Boolean Expression correctly represents the relation between P, Q, R and M

_{1M1 = (P OR Q) XOR RM1 = (P AND Q) XOR RM1 = (P NOR Q) XOR RM1 = (P XOR Q) XOR R}

⇒ Ferrites have

a low copper loss

low eddy current loss

low resistivity

higher specific gravity compared to iron

⇒ In figure, the steady state current through 1H inductanc

Zero

0.125

0.208333333333333

0.25

⇒ The turn ratio of a transformer is 20:1, if a load of 10Ω is connected across the secondary, what will be the effective resistance seen looking into the Primary?

2 kΩ

4 kΩ

8 kΩ

32 kΩ

⇒ In a self bias circuit for CE amplifier the collector supply voltage is made twice. The collector current will

decrease

increase

remain the same

increase or decrease

⇒ Consider the following statements: The function of oxide layer in an IC device is to

- mask against diffusion or non implant
- insulate the surface electrically
- increase the melting point of silicon
- produce a chemically stable protective layer

1, 2, 3 are correct

1, 3, 4 are correct

2, 3, 4 are correct

1, 2, 4 are correct

⇒ In a purely resistive circuit the instantaneous power varies from zero to maximum twice in each cycle.

TRUE

FALSE

⇒ The abbreviation DTL stands for

Digital Timing Logic

Diode Transistor Logic

Dynamic Transient Logic

Delayed Tracking Logic