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Recent questions tagged magnetic fields due to currents
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Two long ideal solenoids (with radii 20 mm and 30 mm, respectively) have the same number of turns of wire per unit
asked
Apr 2, 2019
in
JEE
by
kratos
magnetic fields due to currents
jee mains 2019
+1
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1
answer
The magnetic field B inside a long ideal solenoid is independent of:
asked
Mar 27, 2019
in
Mathematics
by
kratos
magnetic fields due to currents
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1
answer
Helmholtz coils are commonly used in the laboratory because the magnetic field between them:
asked
Mar 19, 2019
in
Mathematics
by
kratos
magnetic fields due to currents
+3
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1
answer
A long, straight wire of radius R carries a current distributed uniformly over its cross-section.
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Feb 20, 2019
in
Class 12
by
kratos
magnetic field due to a current
neet
jee main 2020
moving charges and magnetism
magnetic fields due to currents
class-12
+1
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1
answer
A long straight cylindrical shell has inner radius Ri and outer radius Ro. It carries current i, uniformly distributed over its cross section.
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Jan 19, 2019
in
JEE
by
kratos
magnetic field due to current
jee main 2020
jee
magnetic effect of current
jee mains
magnetic fields due to currents
magnetism
class-12
+3
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1
answer
Current flows through a straight cylindrical conductor of radius r. The current is distributed uniformly over its cross-section.
asked
Jan 15, 2019
in
JEE
by
kratos
magnetic field due to current
magnetic field due to a current
jee
magnetic effect of current
jee mains
magnetic fields due to currents
magnetism
class-12
+1
vote
1
answer
Two long co-axial solenoids of the same length but different radii and different number of turns are wound one over the other.
asked
Jan 9, 2019
in
JEE
by
kratos
electromagnetic induction
cbse
moving charges and magnetism
amperes circuital law
jee mains 2019
magnetic fields due to currents
alternating current
class-12
+3
votes
1
answer
A magnetic field set up using Helmholtz coils (described in Exercise 4.16) is uniform in a small region and has a magnitude of 0.75 T.
asked
Jan 9, 2019
in
JEE
by
kratos
magnetic effects of electric current
moving charges and magnetism
moving charges
jee mains
magnetic fields due to currents
magnetism
class-12
+2
votes
1
answer
Two solenoids of equal number of turns having their length and the radii in the same ratio 1 : 2.
asked
Jan 8, 2019
in
JEE
by
kratos
electromagnetic induction
irodov
electrodynamics
cbse
jee
jee mains 2019
jee mains
magnetic fields due to currents
alternating current
class-12
+1
vote
1
answer
At double the distance from a long current-carrying wire, the strength of the magnetic field produced by that wire decreases to :
asked
Dec 24, 2018
in
JEE
by
kratos
magnetism
magnetic effects of electric current
magnetic field
jee mains
class-10
magnetic fields due to currents
jee
+1
vote
1
answer
A current i is uniformly distributed over the cross section of a long hollow cylindrical wire of inner radius
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Dec 24, 2018
in
JEE
by
kratos
magnetic field due to current
magnetic effects of electric current
jee
magnetic effect of current
jee mains
magnetic fields due to currents
magnetism
class-12
+3
votes
1
answer
A constant current is sent through a helical coil. The coil: A. tends to get shorter B. tends to get longer
asked
Dec 15, 2018
in
Mathematics
by
kratos
magnetic fields due to currents
+3
votes
1
answer
The Figure shows the cross section of a solid cylindrical conductor with radius 0.2 m. The conductor is carrying a uniformly
asked
Sep 23, 2018
in
JEE
by
kratos
jee
magnetic effect of current
electromagnetism
jee mains
magnetic fields due to currents
magnetism
class-12
+1
vote
1
answer
What is a toroid ? Mention an expression for magnetic field at a point inside a toroid?
asked
Sep 11, 2018
in
Class 12
by
kratos
neet
cbse
magnetic effects of electric current
aiims
moving charges and magnetism
amperes circuital law
magnetic fields due to currents
class-12
+3
votes
1
answer
A long straight cylindrical shell carries current i parallel to its axis and uniformly distributed over its cross section.
asked
Aug 6, 2018
in
Class 12
by
kratos
magnetic field due to current
neet
jee main 2020
moving charges and magnetism
magnetic fields due to currents
class-12
+1
vote
1
answer
The Figure shows the cross section of a solid cylindrical conductor with radius R. The conductor is carrying a uniformly
asked
Jul 17, 2018
in
JEE
by
kratos
jee
magnetic effect of current
electromagnetism
jee mains
magnetic fields due to currents
magnetism
class-12
+1
vote
1
answer
A toroid with a square cross section carries current i. The magnetic field has its largest magnitude:
asked
Jun 25, 2018
in
Mathematics
by
kratos
magnetic fields due to currents
+1
vote
1
answer
A long, straight wire of radius a carries a current distributed uniformly over its cross-section. The ratio of the magnetic fields
asked
Jun 24, 2018
in
Class 12
by
kratos
magnetic field due to a current
neet
magnetic effects of electric current
jee
moving charges and magnetism
magnetic effect of current
jee mains
magnetic fields due to currents
magnetism
class-12
+3
votes
1
answer
Consider a toroid of circular cross-section of radius b, major radius R much greater than minor radius b,
asked
May 20, 2018
in
Class 12
by
kratos
cbse
matter
moving charges
aiims 2019
magnetism and matter
magnetic fields due to currents
magnetism
class-12
+1
vote
1
answer
A long, cylindrical wire of radius b carries a current i distributed uniformly over its cross-section.
asked
May 19, 2018
in
JEE
by
kratos
magnetic fields due to currents
jee main 2020
magnetic field due to current
class-12
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