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Q1. | For a given voltage, four heating coils will produce maximum heat when connected |

A. | all in parallel [Correct Answer] |

B. | all in series [Wrong Answer] |

C. | with two parallel pairs in series [Wrong Answer] |

D. | one pair in parallel with the other two in series [Wrong Answer] |

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

⇒ In a FM waveform, the side bands are spaced at intervals equal to

four times the modulating frequency

twice the modulating frequency

half the modulating frequency

modulating frequency

⇒ Both OR and AND gates can have only two inputs.

TRUE

FALSE

⇒ For FM, which of the following statement is not true?

The bandwidth increases as modulation index is increased

The total power remains constant with respect to modulation index

The carrier never becomes zero

All of the above

⇒ Consider the following statements

- ECL has least propagation delay
- TTL has largest fan out
- CMOS has highest noise margin
- TTL has lowest power dissipation

1 and 3

2 and 4

3 and 4

1 and 2

⇒ In a transistor E mode the collector current with the transistor in cut off region is

zero

high

equal to saturated value

none of the above

⇒ An electron shell corresponding to principal quantum number

*n*can contain a maximum of

*n*

^{2}electrons

2

*n*

^{2}electrons

2

*n*electron

*n*

^{3}electron

⇒ In a series ac circuit a voltage of 20 V at 25 Hz causes a current of 0.20 A, while the same voltage at 75 Hz causes a current of 0.12 A. The circuit consists of

R and C in parallel

R and C in series

R and L in series

either (a) or (b)

⇒ A transmission line is feeding 1 watt of power to a horn antenna having a gain of 10 dB. The antenna is matched to the transmission line. The total power radiated by the horn antenna into the free space is

10 watts

1 watt

0.1 watt

0.01 watt

⇒ Nichol's chart is symmetric about - 180° axis.

TRUE

FALSE

⇒ - 56 is not a valid real constant in Fortran.

TRUE

FALSE

⇒ A decoder can be used as a demultiplexer.

TRUE

FALSE

⇒ The sensitivity of a potentiometer can be increased by

increasing the length of wire

decreasing the length of wire

increasing the current in the wire

decreasing the current in the wire

⇒ A modem is classified as low speed if data rate handled is

upto 100 bps

upto 250 bps

upto 400 bps

upto 600 bps

⇒ In paramagnetic materials

permanent magnetic dipoles exist but the interaction between neighbouring dipoles is negligible

permanent magnetic dipole do not exist

permanent magnetic dipoles exist and the interaction between neighbouring dipoles is very strong

permanent magnetic dipole moment may or may not exist

⇒ A pulse function can be represented as difference of two equal step functions.

TRUE

FALSE

⇒ The affect of ground on radiation pattern is to

cause cancellation of radiation along the ground

produce more number of nulls

both (a) and (b)

either (a) or (b)

⇒

Match the following:

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

A. | R = 0 | 1. | Undamped oscillation |

B. | R < 2 L/C | 2. | Damped oscillation |

C. | R = 2 L/C | 3. | Critically damped response |

D. | R > 2 L/C | 4. | Non-oscillatory response. |

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

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

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

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

⇒ The quiescent collector current I

_{C}, and collector to emitter voltage V

_{CE}in a CE connection are the values when

ac signal is zero

ac signal is low

ac signal is negative

either (a) or (b)

⇒ In a crystal

the frequencies of series and parallel resonance are equal

the frequency of series resonance is more than frequency of parallel resonance

the frequency of parallel resonance is more than frequency of series resonance

None of the above

⇒ The following circuit diagram resembl

logic 0

logic 1

*f*(A, B, C) = Σ

*m*(0, 1, 4, 6, 7)

none

⇒ The resolution of an

*n*bit DAC with a maximum input of 5 V is 5 mV. The value of

*n*is

8

9

10

11

⇒ The source of which of the following noise is different from that of the remaining?

Solar noise

Cosmic noise

Galactic noise

Atmospheric noise

⇒ Consider a parallel plate capacitor being charged. Identify the incorrect statements

Energy stored in the capacitor does not enter it through the connecting wires but through the space around the wires and plates uf capacitor

Rate at which energy flows into this volume is equal to the integration of the Poynting vector over the boundary of the volume between the plates.

The Poynting vector points everywhere radially outward of the volume between the plates

The Poynting vector points everywhere radially into the volume between the plates.

⇒ The logic circuit of the given figure realizes the func

(A + B + C)(D)(E)

(A + B + C) (D)(E)

(A + B = C) (D)(E)

(A + B + C)(D)(E)

⇒ Which one of the following is applicable to any network-linear or non-linear, active or passive, time-varying or invariant - as long as Kirchhoff laws are

*not*violated?

Tellegen's theorem

Reciprocity theorem

Maximum power transfer theorem

Superposition theorem

⇒ The circuit in figur

CE amplifier

CB amplifier

Constant voltage source

Constant current source

⇒ An op-amp has zero gain for common mode inputs. Then CMRR =

zero

infinite

high

low

⇒ Which layer is least important in high frequency propagation?

D layer

E layer

F

_{1}layer

F

_{2}layer

⇒ It is required to trace the output characteristics of a CE bipolar transistor on a CRO screen. The proper method is

apply the voltage drop across collector resistance to Y input, disconnect sweep generator and apply V

_{CE}to X input

apply voltage drop across collector resistance to Y input

apply V

_{CE}to X input

apply V

_{CE}to Y input, disconnect the sweep generator and apply voltage drop across collector resistance to X input

⇒ In

*CE*configuration, the output characteristics of a bipolar junction transistor is drawn between

I

_{C}and V

_{CB}

I

_{E}and V

_{CB}

I

_{C}and V

_{CE}

I

_{E}and V

_{CE}