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 single turn loop is situated in air, with a uniform magnetic field normal to its plane. The area of the loop is 5 m^{2} and the rate of change of flux density is 2 Wb/m^{2}/s. What is the emf appearing at the terminals of the loop? |

A. | -5 V [Correct Answer] |

B. | -2 V [Wrong Answer] |

C. | -0.4 V [Wrong Answer] |

D. | 0 V [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ Read the following statements about sets

- If A and B are sets then A + B denotes union of sets A and B.
- The union of A and B is that set whose elements are in either A or B or both.
- If A and B are sets, then difference of sets A and B is denoted by A - B.
- A - B in the set obtained by removing elements of A from B.

All

1, 2 and 3 only

2 and 3 only

1 and 4 only

⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived

EB596

CD231

DA495

25B6A

⇒ A 360 W carrier is simultaneously modulated by two audio wave with modulation percentage of 55 and 65 respectively. Total sideband power radiated will be

500 W

360 W

180 W

130 W

⇒

**Assertion (A):** The expression E = - ΔV, where E is the electric field and V is the potential is not valid for time varying fields.

**Reason (R):** The curl of a gradient is identically zero.

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

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

A is true but R is false

A is false but R is true

⇒ If S represents the carrier synchronization at the receiver and r represents the bandwidth efficiency, then the correct statement for the coherent binary PSK is

r = 0.5, S is required

r = 1.0, S is required

r = 0.5, S is not required

r = 1.0, S is not required

⇒ Which of the following power amplifiers has highest efficiency?

Class A

Class AB

Class B

Class C

⇒ A Yagi antenna has a driven antenna

only

with a reflector

with one or more directors

with a reflector and one or more directors

⇒ Consider the following statements as regards BPSK and QPSK:

- In BPSK we deal individually with each bit of duration T
_{b} - In QPSK we lump two bits to form a symbol
- In both BPSK and QPSK signal changes occur at bit rate
- In QPSK the symbol can have any one of four possible values

1, 2, 3, 4

1, 2, 3

1, 2, 4

2, 3, 4

⇒ In a reflex klystron the output frequency is determined primarily by resonant frequency of cavity.

TRUE

FALSE

⇒ Measurement of Hall coefficient enables the determination of

mobility of charge carriers

type of the conductivity and concentration of charge carriers

temperature coefficient and thermal conductivity

fermi level and forbidden energy gap

⇒ The circuit in figur

positive clamper

negative clamper

positive peak clipper

negative peak clipper

⇒ A permanent magnet moving coil meter can be used as

ac only

dc only

both ac and dc

low frequency ac and dc

⇒ The simplest standing wave is due to the value of reflection co-efficient is

-1

zero

unity

infinity

⇒ For the K map of the given figure the simplified Boolean expressio

A B + A B

B

A

AB

⇒ Large scale integration refers to

more than 50 gates on the same chip

more than 80 gates on the same chip

more than 100 gates on the same chip

none of the above

⇒ A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/

*f*is constant. At 50 Hz, the starting torque is 100 N-m. At 25 Hz, the starting torque

will be less than 100 N-m

will be more than 100 N-m

may be more or less than 100 N-m depending on motor parameters

very small

⇒ The operator precedence in Java is in the order

arithmetic operation, increment and decrement operation, comprassion, logical operation and assignment operation.

increment and decrement operation, arithmetic operation, comparison, logical operation and assignment operation.

comparison, arithmetic operation, increment and decrement operation, logical operation and assignment operation.

arithmetic operation, comparison operation, increment and decrement operation, logical operation and assignment operation.

⇒ In 8085 microprocessor, which of the following interrupts is unmaskable interrupts?

RST 5.5

RST 7.5

TRAP

INTR

⇒ A current of 1 A in the coil of an iron cored electromagnet cause a flux density of 0.2.T. If the current is 2 A, B=

0.2 T

0.4 T

0.4 T or less

0.4 T or more

⇒ The element in the feedback circuit of a logarithmic amplifier using op-amp is

a resistor

a capacitor

an inductor

a diode

⇒ The resonant frequency of the circuit shown in figure

1/22p Hz

1/2p Hz

1/4p Hz

1/2p Hz

⇒ MUF is highest in periods of greatest sunspot activity.

TRUE

FALSE

⇒ IF V

_{CC}= 15 V, V

_{CEQ}= 5 V and I

_{CQ}= 50 mA, the efficiency in class A operation is

1

0.5

0.25

0.167

⇒ The equation ∇ . J = 0 is called

Poisson's equation

Kirchoff's node equation

Continuity equation for static currents

Continuity equation for sampling currents

⇒ In 8 cavity magnetron the p mode corresponds to a total phase shift equal to

± 8 p radians around the periphery

± 4 p radians around the periphery

± 2 p radians around the periphery

± 16 p radians around the periphery

⇒ In a class C operation

V

_{CC}is much larger than V

_{CE(sat)}

V

_{CC}is much smaller than V

_{CE(sat)}

V

_{CC}and V

_{CE(sat)}are nearly equal

none of the above

⇒ Satellite communication uses frequencies in the range of

3 to 6 GHz

3-10 MHZ

10-50 GHz

100-200 GHz

⇒

**Assertion (A):** When a square periodic wave is applied to an RC circuit, the voltage across capacitor is observed to be a triangular periodic wave.

**Reason (R):** The RC circuit works as integrator and its time constant is much larger than time period of input wave.

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

⇒ Consider the following stateme

1 only

1 and 2

2 and 3

3 only

⇒ A 4 bit shift register is initialized to value 1000 for (Q

_{3}, Q

_{2}, Q

_{1}, Q

_{0}). The D input is derived from Q

_{0}, Q

_{2}and Q

_{3}through two XOR gates as shown in figure. The pattern 1000 will appea

3rd pulse

7th pulse

6th pulse

4th pulse