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Q1. | When cells having different emfs are connected in parallel, a circulating current flows. |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ During processing the instructions, data, intermediate results and final results in a computer are held in

CPU

ALU

Primary memory

Secondary memory

⇒ In a Ballistic galvanometer

inertia is small and damping is also small

inertia is large and damping is critical

inertia is large and damping is small

both inertia and damping are large

⇒ Thevenin's theorem is used to find current in a branch of a network. It is now desired to find current in another branch of the network

the same Thevenin's circuit can be used

the same Thevenin's circuit with some modification can be used

it is necessary to find new Thevenin's circuit

either (b) or (c)

⇒ In a line with finite attenuation

power transmission is least efficient when there are no standing waves on the line

power transmission is most efficient when there are no standing waves on line

Load power depends on phase constant

standing waves will always exist on the line

⇒ 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

⇒ For the high-pass circuit to act as a differentiator, the time constant must be

small

very small in comparison to the time period of the input signal

very high in comparison to the time period of the input signal (that is low pass circuit)

moderate value

⇒ A TEM wave is incident normally on a perfect conductor. The E and H fields at boundary will respectively be

minimum and maximum

minimum and minimum

maximum and minimum

maximum and maximum

⇒ The transfer function of transportation lag is

G(

*j*ω) =

*e*

^{jωT }

G(

*j*ω) =

*e*

^{-jωT }

G(

*j*ω) = (1 +

*j*ωT)

G(

*j*ω) = (1 -

*j*ωT)

⇒ If the functions

*w, x, y, z*are as foll

*w = z x = z*

*w = z, x = y*

*w = y*

*w = y = z*

⇒ The characteristic equation of an SR flip-flop in given by

Q

_{n+1}= S + RQ

_{n}Q

_{n+1}= RQ

_{n}+ SQ

_{n}Q

_{n+1}= S + RQ

_{n}

Q

_{n+1}= S + RQ

_{n}⇒ A discrete random variable X takes values from 1 to 5 with probabilities as shown in the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is t

Both the student and the teacher are right

Both the student and the teacher are wrong

Both the student is wrong but the teacher is right

The student is right but the teacher is wrong

⇒ A transmission line of characteristic impedance

*z*

_{0}= 50 Ω. Phase Velocity = 2 x 10

^{8}m/sec, and length

*l*= 1 m is terminated by a load

*z*

_{1}= (30 -

*j*40) ohms. The input impedance of the line for a frequency of 100 MHz will be

(30 +

*j*x 40) Ω

(30 -

*j*40) Ω

(50 +

*j*x 40) Ω

(50 -

*j*40) Ω

⇒ As compared to TTL, CMOS logic has

higher speed of operation

higher power dissipation

smaller physical size

all of the above

⇒ The superposition theorem is applicable to

linear, non-linear and time variant responses

linear and non-linear resistors only

linear responses only

none of the above

⇒ Hall effect is observed in a specimen (metal or semi- conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

normal to both current and magnetic field

in the same direction as current

in a direction anti parallel to magnetic field

none of the above

⇒ The filter circuit for feeding tweeter has

an inductance in series and a capacitance in parallel

a capacitance in series and an inductance in parallel

a resistance in series and a capacitance in parallel

a capacitance in series and a resistance in parallel

⇒ Consider the following reasons for using antenna coupler

- To prevent illegal radiation of spurious frequencies
- To tune out reactive components of antenna impedance
- To have correct value of load impedance for transmitter.

1, 2, 3

1, 2

1 only

2, 3

⇒ The amplitude of a random signal uniformly distributed between - 5 V and 5 V. If the positive values of the signal are uniformly quantized with a step size of 0.05 V, and the negative values are uniformly quantized with a step size of 0.10 V, the resulting signal to quantization noise is approximately

46 dB

43.8 dB

42 dB

40 dB

⇒

Match the following:

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

A. | FM | 1. | slope-overload |

B. | DM | 2. | μ law |

C. | PSK | 3. | Envelope detector |

D. | PCM | 4. | Capture effect |

5. | Hilbert transform | ||

6. | Matched filter. |

A-5, B-1, C-6, D-4

A-4, B-6, C-1, D-5

A-4, B-1, C-6, D-2

A-6, B-3, C-4, D-2

⇒ Typical size of digital IC is about

1″ x 1″

2″ x 2″

0.1″ x 0.1″

0.001″ x 0.001″

⇒ If the mantissa of a digital computer is 37 bit long then the accuracy of the digital computer will be of

37 decimal places

23 decimal places

11 decimal places

accuracy is independent of the length to mantissa

⇒ In figure, the switch is closed at

*t*= 0. At

*t*= 0

^{+}The value of current supplied by batter

0.0416666666666667

0.0833333333333333

zero

infinity

⇒ Which of the following measurements can be done using a counter?

- Pulse duration
- Interval between two pulses
- Amplitude of the pulse
- Rise time of a pulse

1 and 2

2 and 3

1 and 4

2 and 4

⇒ If too large current passes through the diode

all electrons will leave

all holes will freeze

excessive heat may damage the diode

diode will emit light

⇒ Chrome signals in PAL colour television system consist of

R - Y and B - Y signal

V and U signals

I and Q signals

R - Y and G - Y signals

⇒ The Fourier series of a real periodic function has only

- Cosine terms if it is even
- Sine terms if it is even
- Cosine terms if it is odd
- Sine terms if it is odd

(1) and (4)

(1) and (2)

(2) and (4)

(2) and (3)

⇒ Atomic and molecular resonance is observed in many substances

at microwave frequencies

at low frequencies

at frequencies used in AM broadcast

at both (b) and (c)

⇒ When .9432 E - 4 is subtracted from .5452 E - 3 in normalized floating point mode

none of the numbers is changed

.9432 E - 4 is changed to .09432 E - 3 and .5452 E - 3 is not changed

.5452 E - 3 is changed to 5.452 E - 4 but .9432 E - 4 is not changed

both Ihe numbers are changed and their exponents are, made equal to -5

⇒ A microwave connector should have high SWR.

TRUE

FALSE

⇒ 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