Q1. | VF glows with __________ colour when activated. |

A. | Red [Wrong Answer] |

B. | Orange [Wrong Answer] |

C. | Bluish green [Correct Answer] |

D. | none of these [Wrong Answer] |

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

⇒ A 1 mA meter is to be converted to 1 A ammeter. The meter resistance is 100 Ω. The value of shunt resistance is

0.001 Ω

0.1001 Ω

100 Ω

1000 Ω

⇒

Match the following:

List I (VCR system) | List II (Azimuth angle) | ||
---|---|---|---|

A. | VHS | 1. | 7° |

B. | Video 2000 | 2. | 15° |

C. | Betamax | 3. | 6° |

A-1, B-2, C-3

A-1, B-3, C-2

A-3, B-1, C-2

A-3, B-2, C-1

⇒ In using mesh current method it is necessary that at least one mesh current links every element.

TRUE

FALSE

⇒ Which op-amp circuit uses a diode as one of the circuit components?

Integrating amplifier

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Logarithmic amplifier

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⇒ Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?

It is possible to generate SSB at any frequency

SSB with lower audio frequencies present can be generated

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There are more balanced modulators; therefore the carrier is suppressed better

⇒ In most of instruments, the controlling torque is provided by

fluid fraction

spring

eddy current

either (a) or (c)

⇒ For the amplifier circuit of figure, the

*h*parameters of transistor are

*h*

_{ib}= 25 Ω,

*h*

_{fb}= 0.999,

*h*

_{ob}= 10

^{-6}Ω. The voltage gai

0.999

1.98

20

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⇒ The conductivity of germanium increases by about 6 percent per degree increase in temperature.

TRUE

FALSE

⇒ With respect to transmission parameters, which one of the following is correct?

A and B are dimensionless

B and C are dimensionless

A and D are dimensionless

B and D are dimensionless

⇒ Twelve resistance each 2 ohm are connected to form a cube, one resistance being in each arm of cube. The resistance between any two diagonally opposite comers is

1 Ω

2 Ω

4 Ω

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⇒ The resonant frequency of a series resonant circuit is

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independent of inductance of the circuit

independent of capacitance of the circuit

geometric mean of half power frequencies

⇒ In satellite communication, frequency modulation is used because satellite channel has

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large bandwidth and severe noise

maximum bandwidth and minimum noise

high modulation index

⇒ The quantum numbers associated with electron motion are designed as

*a, b, c*

*h, k, l*

*n, m, l*

*h, n, l*

⇒

**Assertion (A):** For networks in figure (1) and (2) sum of products of branch voltages and branch currents at any time is zero.

**Reason (R):** The networks in figure (1) and (2) are not the same structura

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

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

⇒ Binary multiplication 1 x 0 =

1

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10

11

⇒ In a 3 phase full wave regulator feeding a star connected resistance load the input voltage is 400 V line to line. The firing angle is 160°. The line to line output voltage would be

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about 100 V

about 20 V

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⇒ A series RC circuit has R = 5 Ω and C = 10 μF. The current in the circuit is 5 sin 20000*t*. The applied voltage is

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252 sin (20000*t* - 45°)

252 sin 20000*t*

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⇒ Consider the following BJT circ

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2.88 kΩ

200 Ω

18.48 Ω

⇒ A wire has a resistance R ohm. If another wire of the same material and same weight has double the diameter (as compared to the first wire), the resistance of the second wire will be

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0.25 R

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⇒ 4 bit 2's complement representation of a decimal number is 1000. The number is

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⇒ A parallel plate capacitor with air as dielectric has a capacitance C. If the dielectric has a dielectric constant ∈_{r} and the remaining dimensions are the same, the capacitance will be

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∈^{2}_{r}C

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⇒ In directional coupler of the given figure, the terms |*S*_{14}| and |*S*_{23}| of scattering matrix are ne

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0.1 each

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⇒ If a resistance R of 1 Ω is connected between A and B in figure, current flowing through

0.0416666666666667

0.5 A

0.25 A

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⇒ In the full adder, denoting Sum by S and carry by C

S = 1 when two or more inputs are unity

C = 1 when two or more inputs are unity

C = 1 when all the inputs are unity

S = 1 when all the inputs are unity

⇒ In the circuit shown, the steady state is reached with S open S is closed at *t* = 0, the current I in the 1 Ω resistor connected is to be determined at *t* = 0^{+} is give

1

2

3

42828

⇒ In a microprocessor

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one clock cycle consists of several machine cycles

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one machine cycle is always less than one clock cycle

⇒ For the circuit shown in the following figure I_{0}-I_{3} are inputs to the 4:1 multiplexer R(MSB) and S are control

PQ + PQ S + Q R S

P Q + PQ R + P Q S

P Q R + P QR + PQRS + Q R S

PQ R + PQR S + P Q R S + Q R S

⇒ The total electrical energy emitted overall space from an electron of charge *e* and radius *r* is*e*/ε_{0}*r*^{2}*e*^{2}/ε_{0}*r**e*^{2}/4pε_{0}*r*^{2}*e*^{2}/8pε_{0}*r*

⇒ A semiconductor in its purest form called

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extrinsic semiconductor

P-type semiconductor

N-type semiconductor

⇒ Narrow band FM signal can be represented as

A cos (2p*f _{c}t*) - β

*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) - β

_{m}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) + β

_{c}t*A*sin (2p

*f*) sin (2p

_{c}t*f*)

_{m}tA cos (2p

*f*) + β

_{m}t*A*sin (2p

*f*) sin (2p

_{m}t*f*)

_{c}t