Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | A fully charged mobile phone with a 12 V battery is good for a 20 minute talktime. Assume that, during the talk time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk t |

A. | 220 J [Wrong Answer] |

B. | 12 kJ [Wrong Answer] |

C. | 13.2 kJ [Correct Answer] |

D. | 14.4 kJ [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ The Wheatstone bridge method of measuring resistance is ideally suited for the measurement of resistance values in the range of

0.001 to 1 Ω

0.1 to 100 Ω

100 Ω to 10

*k*Ω

100

*k*Ω to 10

*M*Ω

⇒ A reactance function is always a quotient of

even to odd polynomials

odd to even polynomials

even to odd or odd to even polynomials

even to even polynomials

⇒ A single phase fully controlled bridge rectifier is fed by a source having inductance. The output voltage during overlap period is

V

_{m}

0.5 V

_{m}

zero

0.5 V

_{m}- voltage drop across inductance

⇒ The main drawback in the performance of shunt peaked wide band amplifier is

two low gain at low frequency

poor phase response

reduce frequency at middle frequency

that the maximum gain of the stage is small

⇒ Most electromagnetic transmission in rectangular wave-guide uses

TE

_{10}mode

TE

_{01}mode

TE

_{20}mode

TE

_{11}mode

⇒ The r.m.s. value of a half-wave rectified current is 100 A. Its value for full-wave rectification would be __________ amperes.

141.4

200

200/p

40/p

⇒ In spread spectrum technique

a modulated signal is modulated again

a modulated signal is modulated twice again

the power of a modulated signal is increased

the noise component of a modulated signal is decreased

⇒ The properties of FETs resemble closely to

UJT

current transformer

thyristor

thermionic valves

⇒ If the target area is small compared to wavelength of radar the situation is called

resonance region

Rayleigh region

optical region

binomial region

⇒ In a class C amplifier, full cycle conductor of the current is achieved by employing

tuned circuit

transformers

complementary pair

Push pull configuration

⇒ Consider the following stateme

1 and 2

1 and 3

2 and 3

3 only

⇒ The current through R

_{1}is(If β = 99, V

_{BE}= 0.7

0.1 mA

0.35 mA

0.2 mA

none

⇒ A capacitor having capacitance C is raised to voltage V. The energy stored will be

CV

^{2}

V

^{2}/C

0.5 V

^{2}C

0.5 C

^{2}V

⇒ For making a capacitor it is better to have a dielectric having

high permittivity

low permittivity

permittivity same as that of air

permittivity which is neither high nor low

⇒ If an inductance L is connected in one arm of bridge and resistance R

_{1}, R

_{2}, R

_{3}in other three arms

the bridge cannot be balanced

the bridge can be balanced

the bridge is balanced for some specified value of frequency

the bridge is balanced for some specific values of R

_{1}, R

_{2}, R

_{3}

⇒ A voltage doubler circuit is fed by a voltage V

_{m}sin ω

*t*. The output voltage will be nearly 2 V

_{m}only if

load resistance is small

load resistance is large

load resistance is neither small nor large

either (a) or (c)

⇒ A circuit is fed by two sources of the same frequency and values 100 ∠0° V and 20 ∠30°V. The current in a particular branch is 5 ∠19° A. If the magnitudes of the sources and changed to 200 ∠0° V and 40 ∠30° V, the current in that branch should be

5 ∠19° A

10 ∠19° A

10 ∠38° A

10 ∠9.5° A

⇒ The electric breakdown strength is affected by

shape of the waveform of applied voltage

steepness of the wavefront of the applied voltage

composition of the material

all of the above

⇒ If X(

*z*) = (1 -

*a*)

*z*

^{-1}/[(1 -

*z*

^{-1})(1 -

*az*)] and 1 < |

^{-1}*z*|, the final value of

*x*

*is*

_{k}0

1

∞

2

⇒ A transducer must have

good dynamic response

good sensitivity

good resolution

all of the above

⇒ Which of the following is correct?

*y*

_{22}=

*z*

_{22}/|

*z*|

*y*

_{11}=

*z*

_{22}/|

*z*|

*z*

_{11}=

*y*

_{11}/|

*y*|

*z*

_{22}=

*y*

_{22}/|

*y*|

⇒ Consider the following statements regarding an antenna:

- It is a transducer
- Its performance is essentially frequency sensitive
- It is a reciprocal device
- With increase in its effective aperture area, width of the radiated beam increases.

1, 2 and 3

1, 2 and 4

2 and 3 only

1 and 4 only

⇒ For the logic circuit of the given figure the simplified Boolean expressio

Y = AB + A C

Y = (AB) (A C)

Y = ABC

Y = A B + A C

⇒ In a minimum function

the degree of numerator is higher than that of denominator

the degree of numerator is lower than that of denominator

the degree of numerator and denominator are equal

the denominator is a constant

⇒ Full duplex operation

requires modems at both ends of circuit

requires two pairs of cables

can transfer data in both directions simultaneously

all of the above

⇒ The Nyquist plo

will start from (ω = ∞) in the first quadrant and will terminate (ω = 0) in the second quadrant

will start from (ω = ∞) in the fourth quadrant and will terminate (ω = 0) in the second quadrant

will start form (ω = ∞) in the second quadrant and will terminate (ω = 0) in the fourth quadrant

will start from (ω = ∞) in the first quadrant and will terminate (ω = 0) in the fourth quadrant

⇒ Binary 1111 when subtracted from binary 11111 is

101110

10110

10000

100010

⇒ In a digital counter the number of flip-flops is

always 2

always even

always odd

equal to the number of bits required in the final binary count

⇒ The normalised form of 1.81 x 10

^{-11}is

18.1 x 10

^{-12}

18.1 x 10

^{-13}

0.181 x 10

^{-10}

0.0181 x 10

^{-9}

⇒

Match the following:

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

A. | shift Register | 1. | Frequency division |

B. | Counter | 2. | Addressing in memory chips |

C. | Decoder | 3. | Serial to parallel Data conversion |

A-3, B-2, C-1

A-3, B-1, C-2

A-2, B-1, C-3

A-1, B-2, C-2