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Q1. | The system of linear equations 4x + 2y = 1 , 2x + y = 6 has |

A. | a unique solution [Wrong Answer] |

B. | no solution [Correct Answer] |

C. | an infinite number of solutions [Wrong Answer] |

D. | exactly two distinct solutions [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ In all metals

conductivity decreases with increase in temperature

current flow by electrons as well as by holes

resistivity decreases with increase in temperature

the gap between valence and conduction bands is small

⇒

**Assertion (A):** PIN diode can be used as attenuator and limiter.

**Reason (R):** PIN diode has a thin intrinsic layer.

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

⇒ 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 network contains only independent current source and resistors. If the values of all resistors are doubled, the value of the node voltage

will become half

will remain unchange

will become one third

cannot be determined unless the circuit configuration and the values of the resistors are known

⇒ In the circuit of figur

I

_{1}will always lag I

_{3}

I

_{2}may be in phase or lag I

_{3}

I

_{3}will always lag I

_{2}

I

_{2}and I

_{3}will be in phase

⇒

**Assertion (A):** In an R-L circuit having low resistance, current lags the voltage by nearly 90°.

**Reason (R):** Power factor of a series RL circuit is R/Z.

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

⇒ The ripple factor of a full wave rectifier is about 0.5.

TRUE

FALSE

⇒ Push pull amplifier is

class B

class A

class C

Class A or Class C

⇒ TDM

can be used with PCM only

interleaves pulses belonging to different transmissions

combines five groups into a super group

stacks 24 channels in adjacent frequency slots

⇒

Match the following:

List I (Electron spin) | List II (Phenomenon) | ||
---|---|---|---|

A. | ↑↑↑↑ | 1. | Antiferromagnetism |

B. | ↑↓↑↓ | 2. | Ferrimagnetism |

C. | ↑↓↑↓ | 3. | Ferromagnetism |

A-1, B-2, C-3

A-3, B-2, C-1

A-2, B-3, C-1

A-3, B-1, C-2

⇒ Short-circuited stubs are used, because open-circuited stubs are

liable to radiate

complex in nature

providing open-circuit environments

unable to provide work over large frequency range

⇒ A number given in binary as 0101.01 is to be scaled up 4 times. The scaled up binary is

10101

1.0101

404.04

10.101

⇒ Assuming V

_{CE sat}= 0.2 V and β = 50, the minimum base current (I

_{B}) required to drive the transistor in the given figure to saturatio

56 μA

140 μA

60 μA

3 μA

⇒ Two phasors having rms values V

_{1}and V

_{2}which are added to give a phasor having rms value V

_{3}. V

_{3}is maximum if phase angle between V

_{1}and V

_{2}is

90°

180°

270°

360°

⇒ The number of tightly bound electrons in silicon atom are

14

10

6

4

⇒ In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.

TRUE

FALSE

⇒ A P-N junction diode dynamic conductance is directly proportional to

the applied voltage

the temperature

its current

thermal voltage

⇒ Consider the following statemen

1 only

2 only

1 and 2

2 and 3

⇒ Bellows converts

pressure difference into displacement

pressure difference into voltage

displacement into pressure difference

either (a) or (c)

⇒ The voltage induced in a loop of wire rotating in a strong and steady magnetic field is

pulsating dc

dc

rectified ac

ac

⇒ The voltage transfer functions of two port circuits connected in cascade can be easily found from

product of individual ABCD matrices

product of voltage transfer functions of two networks

sum of

*z*matrices

sum of

*h*matrices

⇒ In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half the secondary winding is 40 V. If diodes are ideal, the average output voltage is

40 V

25.5 V

20 V

2.55 V

⇒ The Hilbert transform of cos ω

_{1}

*t*+ sin ω

_{2}

*t*is

sin ω

_{1}

*t*+ cos ω

_{2}

*t*

sin ω

_{1}

*t*- cos ω

_{2}

*t*

cos ω

_{1}

*t*- cos ω

_{2}

*t*

sin ω

_{1}

*t*+ sin ω

_{2}

*t*

⇒

*c*(

*t*) and

*m*(

*t*) are used to generate an AM signal. The modulation index of the generated AM signal is 0.5 then the quant

42737

42739

42738

42743

⇒ The effective refraction index of the ionosphere for radio wave is

more than unity

less than unity

equal to unity

either more or less than unity depending on the electron concentration

⇒ The effect of lead resistance is important in measurement of

resistance of shunt

resistance of shunt winding

resistance of ammeter

both (a) and (c)

⇒ The impulse response

*h*[

*n*] of a linear time invariant system is given by

*h*[

*n*] = ∪[

*n*+ 3 ] + ∪[

*n*- 2] -2∪[

*n*-7]. The above system is

stable but non-casual

stable and casual

casual but unstable

unstable and not casual

⇒ An op-amp is fed from a signal source through resistance R

_{1}. If it is to work as sign changer, the feedback resistance R

_{f}should be

equal to R

_{1}

twice R

_{1}

half R

_{1}

either (b) or (c)

⇒ Periodic recharging of the memory cells at regular intervals of 3 to 8 millisecond is required in a

ROM

Static RAM

Dynamic RAM

PLA

⇒ In figure, the switch is closed at

*t*= 0. At

*t*= 0

^{+},

*di*/

*dt*= 4 A/s. Then

10 V

20 V

40 V

80 V