Answer / sowmya

actually both mean the same and may differ in some cases.....
because both are used to vary the voltage....

Answer / sajid m

auto transformer secondary is provided by taps that are
fixed in the winding but varic secondary voltage is providig
a sliding tip along the all of winding

Answer / ch.phani

autotransformer is just like a normal transformer provided
with tappings
but with variac any variation in the given range is possible
for example a 230v/270 v variac is used to vary the voltage
in range of (0-270)v

Answer / sunil datta

An auto transformer operates automatically and variac
manually.

How much DC or AC Current that a Human Body withstand for Electrical Shocks?

4 Answers   Suzlon,

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What is the polarization index value ? (Pi value)and simple definition of polarization index ?

0 Answers  

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how c-curve of mcb's actually looks alike?

0 Answers  

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A resistance, inductance & capacitance are connected in series between points A & B.The voltage drops across the resistance,inductance&capacitance are found to be 40V,70V&100V respectively. What is the total voltage between between points A&B (Vab)? a)210V b)70V c)50V d)230V

6 Answers  

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what would happen if u assume to insulate all the overhead lines and no insulators....??do you think it to b an advantag or a disadvantage??justify.

3 Answers  

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1) What is difference b/w impedence relay and differential relay? 2) what are substations equipments? 3) what is difference b/w circuit breaker and isolator? 4)what are the types of circuit breakers? 5) which medium is mostlty used in circuit breakers and why it is used?

1 Answers   NTDC,

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WHy neutral to ground trips when neutral touches the ground

1 Answers  

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Explain few advantages of electric traction system?

0 Answers  

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why CFL lamp requires less electricity than a normal lamp?/

3 Answers  

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I have 480V Single phase and I am trying to figure how big of a transformer (KVA's) and Primary breaker size I need to provide 200 Amps at 240V for a building.

1 Answers   Wipro,

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How does a battary stores charge in it? please explain in simple manner and in detail.thanks

0 Answers  

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How can transformer winding insulation be measured (Delta & Star Connections)?

3 Answers  

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