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Q1. | The purpose of earthing electric appliances is |

A. | to provide safety against shock [Correct Answer] |

B. | to ensure that appliance works satisfactorily [Wrong Answer] |

C. | to ensure that appliance gets full voltage [Wrong Answer] |

D. | all of the above [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 :**

⇒ A pole zero pattern of a certain filter is shown in figure. This filter mus

LPF

BFP

HPF

APF

⇒ Bellows converts

pressure difference into displacement

pressure difference into voltage

displacement into pressure difference

either (a) or (c)

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

TRUE

FALSE

⇒ In a JK master slave flip flop race condition does not occur.

TRUE

FALSE

⇒ Which of the following devices uses a slow wave structure?

Klystron two cavity amplifier

Klystron multicavity amplifier

Reflex klystron oscillator

TWT

⇒ Which one is not correct for folded dipole antenna?

High I/P impedance

Low I/P impedance

High bandwidth

Used as reactance compensation network

⇒ Which of the following statement is correct?

Decimal 9 is represented as 1011 in Excess-3 code

Decimal 9 is represented as 1001 is BCD code

Decimal 10 is represented as 1100 is Gray code

Decimal 10 is represented as 1001 in binary code

⇒ A signal

*x*(

*t*) = 100 cos (24p x 10

^{3}

*t*) is ideally sampled with a sampling period of 50 μ sec and then passed through an ideal low pass filter with cut off frequency of 15 kHz Which of the following frequencies are present at the filter output?

12 kHz only

8 kHz only

12 kHz and 9 kHz

12 kHz and 8 kHz

⇒ A capacitor used for power factor correction in single- phase circuit decreases

the power factor

the line current

both the line current and the power factor

the line current and increases power factor

⇒ The timing difference between a slow memory and fast processor can be resolved if

processor is capable of waiting

external buffer is used

either (a) or (b)

neither (a) nor (b)

⇒ The carriers of

*n*channel JFET are

free electrons and holes

holes

free electrons or holes

free electrons

⇒ Given below a block diagram of oscillator circuit with various reactance elemen

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= C

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= L

*x*

_{1}= C,

*x*

_{2}= C,

*x*

_{3}= L

*x*

_{1}= L,

*x*

_{2}= C,

*x*

_{3}= L

⇒ Modulated carrier power in FM

increases with modulating signal power

decreases with modulating signal power

is independent of the modulating signal power

none

⇒ In Java 31% gives an answer

3

4

42798

42828

⇒ The widely used binary multiplication method is

repeated addition

add and shift

shift and add

any of the above

⇒ An

*m*derived low pass filter has

*f*

_{c}= 1000 Hz,

*f*

_{∞}= 1250 Hz and

*m*= 0.6. If

*m*is increased, then

both

*f*

_{c}and

*f*

_{∞}will increase

both

*f*

_{c}and

*f*

_{∞}will decrease

*f*

_{c}will remain constant but

*f*

_{∞}will decrease

*f*

_{c}will remain constant but

*f*

_{∞}will increase

⇒ A practical Parallel resonant circuit has a coil in Parallel with a 0.14 μf capacitor. The coil has an inductance of 1 mH and a resistance of 10 ohms. The Q of the circuit is

1000

100

10

1

⇒ Which of the following conversion is incorrect?

111110111

_{2}= 767

_{8}

11011010

_{3}= 665

_{8}

1011.1111

_{2}= 13.74

_{8}

10101.11

_{2}= 26.5

_{8}

⇒ The symbol ! in Java means

logical NOT

logical OR

AND

logical XOR

⇒ For the circuit, let us assume that R = 1 Ω, L = 10

^{-3}H, and V(t) = 10 cos (1000

*t*+ 30°)V and the differential equation for I(

*t*) is give

7.07 cos (1000

*t*+ 15°) A

70.7 cos (1000

*t*- 30°) A

7.07 cos (1000

*t*- 15°) A

7.07 cos (1000

*t*+ 15°) A

⇒ The magnetic field due to current I equals

I/2 p

*r*

I/4 p

*r*

I

^{2}/2 p

*r*

I

^{2}/4 p

*r*

⇒ A varactor diode is used for

tuning

rectification

amplification

rectification and amplification

⇒ Which of the following method cannot be used to increase the bandwidth for cascaded RF amplifier stages?

Wave traps in each stage

Stagger tuning

A shunt damping resistor across each tuned circuit

Doubled tuned transformers with tighter coupling

⇒ A

*n*-port network is said to be active if power in the ckt is __________ .

P > 0

P < 0

P = 0

P = ∞

⇒ Which of the following has highest power gain?

CE

CC

CB

CB or CC

⇒ A blank EPROM has

all bits set to logical 0

all bits set to logical 1

half the total number of bits set to 0 and remaining half to logical 1

either (a) or (b)

⇒ If V

_{a}= 10 ∠0, V

_{b}= 10 ∠ -120° and V

_{c}= 10 ∠ -240°, then V

_{a2}and V

_{a0}are

10 and 0 respectively

0 and 10 respectively

0 and 0

10 and 10

⇒ The atomic number of silicon is 14. It can be therefore concluded that

a silicon atom contains 14 protons

a silicon atom contains 14 neutrons

a silicon atom contains 14 electrons

all of the above

⇒ A single phase bridge type cycloconverter uses eight thyristors.

TRUE

FALSE

⇒ A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the guide wavelength for dominant mode.

13.5 m

3 m

88/3 m

3/88 m