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Q1. | As temperature increases, the temperature coefficient of metals increases. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct Answer] |

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

⇒ In figure, secondary winding has 40 turns. For maximum power transformer to 2 ohm resistance the number of turns in primar

20

40

80

160

⇒ Radar is essentially an echo ranging system

TRUE

FALSE

⇒ Gain stability in an oscillator can bs achieved by

providing negative feedback

providing positive feedback

using low Q circuits

controlling the gain

⇒ A 4 bit ripple counter uses flip flops with propagation delay of 50 ns each. The maximum clock frequency which can be used is

5 MHz

10 MHz

20 MHz

25 MHz

⇒ Two wattmeter method of 3-phase power measurement can be used to find

total active power

total active power and power factor

total active power and reactive power

total active power, power factor, apparent power, and reactive power

⇒ A first order system will never be able to give a __________ response.

- Band pass
- Band reject
- All pass

1, 2 and 3 are true

1 and 3 are true, 2 is false

1 and 2 are false, 3 is true

1 and 2 are true, 3 is false

⇒

**Assertion (A):** In FM all power amplifiers can be operated in class C

**Reason (R):** FM is a constant amplitude modulation system.

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

A is wrong but R is correct

⇒ IC 74181 performs arithmetic operations when M = 1.

TRUE

FALSE

⇒ Complex poles give rise to oscillatory terms in the response.

TRUE

FALSE

⇒ In figure, the curre

is 2 A from A to B

is 2 A from B to A

depends on the value of R

none of the above

⇒ Find R

_{L}for maximum power tran

3 Ω

1.125 Ω

4.17 Ω

none

⇒ Efficiency of class A power amplifier is very poor.

TRUE

FALSE

⇒ The constant M loci on G(

*s*) plane are a family of circles.

TRUE

FALSE

⇒ The ratio of impurity atoms to intrinsic semiconductor atoms in an extrinsic semiconductor is about.

0.0486111111111111

0.736111111111111

1 : 100000

1 : 10

^{8}

⇒ In Bode diagram (log magnitude plot) of the factor 1/(1 +

*j*ωT) in the transfer function the log magnitude for ω << 1/T can be approximated by

0 dB

20 log ωT dB

-20 log ωT dB

none of the above

⇒

Match the following:

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

A. | D Layer | 1. | 110 km |

B. | E layer | 2. | 10 km |

C. | F layer | 3. | 60 km |

D. | Troposphere | 4. | 350 km |

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

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

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

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

⇒ In a semi converter feeding a resistive load, the firing angle is a. Each thyristor conducts for

p radians

(p - a) radians

(p + a) radians

(p - 0.5 a) radians

⇒ For a transistor if a

_{dc}= 0.98 and emitter current I

_{E}is 2 mA, then base current will be

10 μA

40 μA

80 μA

200 μA

⇒ If ω

_{0}is the angular frequency of rotation of electron in the absence of magnetic field, the angular frequency ω, when a magnetic field B is acting is ω ≅ ω

_{0}+ (

*e*/2

*m*)B.

TRUE

FALSE

⇒ In Bode plots the frequency at which two asymptotes meet is called corner frequency.

TRUE

FALSE

⇒ The counter which require maximum number of FF for a given mod counter is

Ripple counter

BCD counter

Ring counter

Programmed counter

⇒ The numerical value of directive gain may lie between

1 and + 1

0 and 1

0 and ∞

1 and ∞

⇒ Schrodinger wave equation is partial differential equation.

TRUE

FALSE

⇒ A single phase semiconverter is feeding a highly inductive load and has freewheeling diode across the load. The waveshapes of output voltage and output current

are similar

are not similar

may be similar or dissimilar

are similar only if firing angle is zero

⇒ The polarization of dielectric materials results in

production of eddy currents

creation of electric dipoles

absorption of electrons

release of high velocity protons

⇒ The nodal method of circuit analysis is based on

KVLs, ohm law

KCLs, ohm law

KCLs, KVL

KCL, KVL, ohms law

⇒ Which of the following is not a valid real constant?

-73.1

10251,3

10.23

-5.7381

⇒ In 8086 microprocessor, if the segment register contains 1 FAB and IP register contains 10AI, the effective memory address is

20B51

304C

FBC0

FDB5

⇒ A speech signal, band limited to 4kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits. Assuming the signal to be uniformly distributed between its peak values, the signal to noise ratio at the quantizer output is

156 dB

32 dB

48 dB

64 dB

⇒ If the value of C

_{2}and C

_{3}are doubled, the oscillation frequency will be

quadrupled

doubled

unchanged

halved