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Recent questions tagged electromagnetic induction
+2
votes
1
answer
Two coils have a mutual inductance 0.005 H. The current changes in the first coil according to equation
asked
Apr 7, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
jee
aiims
jee mains
magnetism
alternating current
class-12
+2
votes
1
answer
In transformer, alternating current is induced in
asked
Apr 7, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
alternating current
class-12
+3
votes
1
answer
A conducting square loop having edges of length 2.0cm is rotated through 180° about a diagonal in 0.20s.
asked
Apr 7, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
magnetism
alternating current
class-12
+3
votes
1
answer
The magnetic field due to a current carrying loop of radius 3 cm at a point on its axis at a distance 4 cm from the center is 54 µT.
asked
Apr 7, 2019
in
JEE
by
kratos
magnetism
electromagnetic induction
jee
jee mains
+1
vote
1
answer
A direct current of 2A and an alternating current having a maximum value of 2A flow through two identical resistances.
asked
Apr 7, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
ac bridges
electricity
jee
aiims
class-9
jee mains
electromagnetism
magnetism
+3
votes
1
answer
A 20 Henry inductor and coil is connected to a 10 ohm resistance in series as shown in figure. The time at which rated
asked
Apr 5, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
cbse
jee
jee mains 2019
jee mains
alternating current
class-12
+1
vote
1
answer
A circular loop of wire * in the same plane as an infinitely long wire carrying a constant
asked
Apr 5, 2019
in
JEE
by
kratos
electromagnetic induction
cbse
jee main 2020
jee
kvpy
jee mains 2019
jee mains
magnetism
class-12
+2
votes
1
answer
Describe the term : Alternating Current.
asked
Apr 5, 2019
in
Class 12
by
kratos
electromagnetic induction
class-12
alternating current
+1
vote
1
answer
Consider the situation shown in figure (38-E13). The wire PQ has mass m,
asked
Apr 5, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
alternating current
class-12
+2
votes
1
answer
In the transmission of a.c. power through transmission lines, when the voltage is stepped up n times,
asked
Apr 5, 2019
in
Class 12
by
kratos
electromagnetic induction
class-10
icse
alternating current
class-12
+3
votes
1
answer
What are Eddy currents? Give its two uses.
asked
Apr 4, 2019
in
Class 12
by
kratos
electromagnetic induction
class-12
alternating current
+2
votes
1
answer
Starting from the expression for the energy W = (1/2)LI^2, stored in a solenoid of self-inductance L to build up the current
asked
Apr 4, 2019
in
Class 12
by
kratos
electromagnetic induction
magnetic flux
cbse
class-12
induction
+3
votes
1
answer
Hence obtain the expression for the energy density of magnetic field B produced in the inductor.
asked
Apr 4, 2019
in
Class 12
by
kratos
electromagnetic induction
neet
cbse
alternating current
class-12
+3
votes
1
answer
A Gaussian surface in the figure is shown by dotted line. The electric field on the surface will be
asked
Apr 4, 2019
in
JEE
by
kratos
electromagnetic induction
electrostatics
jee
gauss law applications
jee mains
gauss law
class-12
current electricity
+2
votes
1
answer
Why the core of a transformer is laminated ?
asked
Apr 3, 2019
in
Class 12
by
kratos
electromagnetic induction
isc
electro magnetic induction
icse
bseb model set
alternating current
class-12
+1
vote
1
answer
What is motional emf?
asked
Apr 3, 2019
in
Class 12
by
kratos
electromagnetic induction
class-12
alternating current
+3
votes
1
answer
The equivalent inductance of the network shown here is
asked
Apr 3, 2019
in
JEE
by
kratos
electromagnetic induction
jee
jee mains
magnetism
alternating current
+3
votes
1
answer
A straight wire carrying a current I2 runs along the axis of a circular current I1 (Fig.). What is the force of interaction between the currents?
asked
Apr 2, 2019
in
JEE
by
kratos
electromagnetic induction
irodov
electrodynamics
jee
magnetic field
jee mains
+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
Two identical loops, one of copper and the other of aluminium, are rotated with the same angular speed in the same magnetic field.
asked
Apr 2, 2019
in
Class 12
by
kratos
electromagnetic induction
class-12
cbse
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