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Recent questions tagged transformer
+3
votes
1
answer
The r.m.*. current in an ac circuit is 2 A. If the wattless current be √3 A , what is the power factor
asked
Apr 2, 2019
in
JEE
by
kratos
electromagnetic induction
transformer
cbse
jee
jee mains
alternating current
class-12
generator
+1
vote
1
answer
With a diagram, explain the working of a transformer.
asked
Mar 10, 2019
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+2
votes
1
answer
State the underlying principle of a transformer.
asked
Mar 5, 2019
in
Class 12
by
kratos
transformer
cbse
class-11
principles and processes
biotechnology
alternating current
class-12
generator
+3
votes
1
answer
To convert mechanical energy into electrical energy, one can use (a) DC dynamo
asked
Mar 4, 2019
in
JEE
by
kratos
electromagnetic induction
transformer
cbse
jee
electro magnetic induction
class-10
jee mains
alternating current
class-12
generator
+2
votes
1
answer
Show a plot of variation of alternating emf versus time generated by a loop of wire rotating in a magnetic field.
asked
Feb 24, 2019
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+3
votes
1
answer
Ram is a student of class X in a village school. His uncle gifted him a bicycle with a dynamo fitted in it.
asked
Feb 22, 2019
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+3
votes
1
answer
The most suitable metal for making electromagnets and transformer cores is
asked
Feb 10, 2019
in
JEE
by
kratos
transformer
bsnl
cbse
magnetic effects of electric current
jee
magnetic effect of current
jee mains
magnetism
alternating current
class-12
generator
+2
votes
1
answer
(i) Draw a labelled diagram of a step-down transformer. State the principle of its working.
asked
Jan 25, 2019
in
Class 12
by
kratos
alternating current
class-12
transformer
cbse
generator
+3
votes
1
answer
Mention the two characteristic properties of the material suitable for making core of a transformer.
asked
Dec 29, 2018
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+2
votes
1
answer
State the principle of working of a transformer. Can a transformer be used to step up or step down a d.c. voltage?
asked
Dec 24, 2018
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+1
vote
1
answer
Draw a labelled diagram of a step-up transformer and explain briefly its working.
asked
Dec 22, 2018
in
Class 12
by
kratos
transformer
cbse
class-10
magnetic effect of current
icse
electromagnetism
alternating current
class-12
generator
+3
votes
1
answer
The probabilities of two students A and B coming to the school in time are 3/7 and 5/7 respectively.
asked
Dec 19, 2018
in
Class 12
by
kratos
transformer
cbse
class-11
probability
alternating current
class-12
generator
+3
votes
1
answer
Why is choke coil needed in the use of fluorescent tubes with ac mains ?
asked
Dec 16, 2018
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+3
votes
1
answer
Fluorescent tubes are fitted with a choke. The choke coil : (a) steps up the line voltage
asked
Dec 12, 2018
in
Class 12
by
kratos
electricity and magnetism
transformer
cbse
csat
alternating current
class-12
generator
+3
votes
1
answer
Differentiate between a.c. power supply and d.c Power supply.
asked
Dec 11, 2018
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+1
vote
1
answer
Draw an arrangement for winding of primary and secondary coils in a transformer with two coils on a separate limb of the core.
asked
Nov 10, 2018
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
+3
votes
1
answer
Explain the use of motor starter or choke coil.
asked
Oct 30, 2018
in
Class 12
by
kratos
transformer
cbse
electrical maintenance
alternating current
class-12
generator
+2
votes
1
answer
Mention the two characteristic properties of the material suitable for making core of a transformer.
asked
Oct 14, 2018
in
Class 12
by
kratos
transformer
neet
cbse
aiims
class-10
icse
magnetism and matter
alternating current
class-12
generator
electro megnetism
+2
votes
1
answer
Draw a plot showing the variation of current I as a function of angular frequency w
asked
Sep 29, 2018
in
Class 12
by
kratos
alternating current
class-12
lcr series circuits
neet
transformer
cbse
aiims
generator
+1
vote
1
answer
An athlete peddles a stationary tricycle whose pedals are attached to a coil having 100 turns each of area 0.1 m^2
asked
Sep 16, 2018
in
Class 12
by
kratos
transformer
cbse
alternating current
class-12
generator
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