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Q1. | A single phase energy meter has the rating 1200 resolutions/ kWh. If a 500 W electric gadget is used for 4 hours, the energy meter will make |

A. | 1200 revolutions [Wrong Answer] |

B. | 1800 revolutions [Wrong Answer] |

C. | 2100 revolutions [Wrong Answer] |

D. | 2400 revolutions [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 following sequence represents autocorrelation of a real valued signal. The energy of real valued sequence is given by __________

*x(n)*= {1, _, 3, _, 5, _, 7, _, 9, 10, _, 8, _, 6, _, 4, _, 2

2[1

^{2}+ 2

^{2}+ 3

^{2}+ 4

^{2}+ 5

^{2}+ 6

^{2}+ 7

^{2}+ 8

^{2}+ 9

^{2}] + 10

^{2}

10

10

^{2}

2[1

^{2}+ 2

^{2}+ 3

^{2}+ 4

^{2}+ 5

^{2}+ 6

^{2}+ 7

^{2}+ 8

^{2}+ 9

^{2}+ 10

^{2}]

⇒ At 20 GHz , the gain of a parabolic dish antenna of 1 meter diameter and 70% efficiency is

15 dB

25 dB

35 dB

45 dB

⇒ X and Y are two random variable and Z = X + Y. Let σ

_{x}^{2}, σ

_{y}^{2}and σ

_{z}^{2}be variance of X, Y and Z. Then

σ

_{z}^{2}= σ

_{x}^{2}+ σ

_{y}^{2}

σ

_{z}^{2}≤ σ

_{x}^{2}+ σ

_{y}^{2}

σ

_{z}^{2}< σ

_{x}^{2}+ σ

_{y}^{2}

σ

_{z}^{2}> σ

_{x}^{2}+ σ

_{y}^{2}

⇒ Which one of the following statement is correct?

Both Laplace's (L) and Poisson's (P) equation are non linear

L is non linear but P is linear

L is linear but P is non linear

L, P both is linear

⇒ An electromagnetic wave incident on a perfect conductor is

fully transmitted

partially transmitted

entirely reflected

none of the above

⇒ A NAND gate has 3 inputs and one output. The number of thyristors required for this gate are

1

2

3

3 or 4

⇒

**Assertion (A):** Thyristors can be used in controlled heating, excitation systems of alternators, speed control of motors and HVDC

**Reason (R):** A static var system using thyristors is very commonly used in high voltage ac systems.

Both A and R are correct and R is correct explanation of A

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ What will be the propagation constant at 10 MHz?

3.4 radians/km

34.4 radians/km

344 radians/km

3440 radians/km

⇒ In transistor radio receivers the number of IF amplifier stages are

1

2

4

6

⇒ Noise limiter is provided on AM receivers to

reduce interfering noise due to ignition system

reduce noise due to electrical storms

reduce interference due to electrical machinery

all of the above

⇒ Poor power factor

reduces load handling capability of electrical system

results in more power losses in the electrical system

overloads alternators, transformers and distribution lines

all

⇒ Which of the following statements is not true in regard to storage time of a diode?

During this time, the diode is reverse-biased

The diode conducts during this time

It is due to the time taken by carriers to depart from the function when the diode is reverse-biased

During this time the diode current is zero

⇒ 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*+ cos ω

_{2}

*t*

⇒ In the circuit of figure the current through 5 Ω resistance at

*t*= 0

^{+00.4166666666666676.67 A5.1 A}

⇒ A 16:1 multiplexer has 4 select input lines.

TRUE

FALSE

⇒ If number of information bits is 11, the number of parity bits in Hamming code is

5

4

3

2

⇒ Resistivity of copper is nearly

1.56 μ ohm-cm

3.95 μ ohm-cm

14.55 μ ohm-cm

22.05 μ ohm-cm

⇒ In common base connection, the output characteristics of a bipolar junction transistor is drawn between

I

_{C}and V

_{CB}

I

_{C}and V

_{CE}

I

_{E}and V

_{CB}

I

_{E}and V

_{CE}

⇒ A buffer amplifier should have

high output impedance and high input impedance

high output impedance and low input impedance

low output impedance an low input impedance

low output impedance and high input impedance

⇒ Rotation of a geosynchronous satellite means its

drift from stationary position

wobbling

three-axis stabilization

three-dimensional stabilization

⇒

**Assertion (A):** Laplace transform of impulse function is equal to area under the impulse.

**Reason (R):** An impulse function whose area is unity is called unit impulse function.

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

R is correct but A is wrong

⇒ Out of S, R, J, K, Preset, Clear inputs to flip flops, the synchronous inputs are

S, R, J, K only

S, R, Preset, Clear only

Preset, Clear only

S, R only

⇒ In figure I

_{D}= 4 mA. Then V

_{GS4.4 V-4.4 V0.44 V-0.44 V}

⇒ The circuit shown in the figure, with R = 1/3 Ω, L = 1/4H, C = 3F has input voltage

*v*(

*t*) = sin2

*t*. The resulting current

*i*(

*t*

5 sin (2

*t*+ 53.1°)

5 sin (2

*t*- 53.1°)

25 sin (2

*t*+ 53.1°)

25 sin (2

*t*- 53.1°)

⇒ Many compounds also exhibit semiconducting properties.

TRUE

FALSE

⇒ When a JFET is cut off, it's like an __________ switch and when it is saturated, it's like a __________ switch.

closed, open

open, closed

open, open

closed, closed

⇒ In figure V

_{CEQ}for each transisto

V

_{CC}

0.5 V

_{CC}

0.75 V

_{CC}

0.25 V

_{CC}

⇒ In which counter does the maximum frequency depend on the modulus?

Synchronous

Ripple

Both synchronous and ripple

Neither synchronous nor ripple

⇒ When a binary adder is used as BCD adder, the sum is

correct when it is < 9

correct when it is > 9

correct when it is < 16

none of these

⇒ In hexadecimal number system, A is equal to decimal number

10

11

17

18