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Moving Charges and Magnetism
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Moving Charges and Magnetism
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15 Questions

1. An electron enters a region where magnetic field(B) and electric field (E) are mutually perpendicular - then [1994]
2. Energy in a current carrying coil is stored in theform of [1989]
3. Tesla is the unit of [1988]
4. A straight wire of length 0.5 metre and carrying acurrent of 1.2 ampere is placed in uniform magnetic fieldof induction 2 teslaThe magnetic field is perpendicularto the length of the wireThe force on the wire is [1992]
5. A galvanometer of resistance 20 Ω gives full scaledeflection with a current of0.004 ATo convert it into anammeter of range 1 A - the required shunt resistanceshould be [1996]
6. Tesla is the unit of [1988]
7. A uniform magnetic field acts at right angles to thedirection of motion of electronAs a result - the electronmoves in a circular path of radius 2cmIf the speed ofelectron is doubled - then the radius of the circular pathwill be [1991]
8. The magnetic induction at a point P which is at adistance of 4 cm from a long current carrying wire is 10 -“3 TThe field of induction at a distance 12 cm from thecurrent will be [1990]
9. An electron enters a region where magnetic field(B) and electric field (E) are mutually perpendicular - then [1994]
10. A straight wire of diameter0.5 mm carrying acurrent of 1 A is replaced by another wire of 1 mmdiameter carrying same currentThe strength ofmagnetic field far away is [1995 - 97 - 99]
11. The magnetic induction at a point P which is at adistance of 4 cm from a long current carrying wire is 10 -“3 TThe field of induction at a distance 12 cm from thecurrent will be [1990]
12. A current carrying coil is subjected to a uniformmagnetic fieldThe coil will orient so that its planebecomes [1988]
13. A charge moving with velocity v in X-direction issubjected to a field of magnetic induction in negative XdirectionAs a result - the charge will [1993]
14. The magnetic field at a distance r from a long wirecarrying current i is 0.4 teslaThe magnetic field at adistance 2 r is [1992]
15. A uniform magnetic field acts at right angles to thedirection of motion of electronAs a result - the electronmoves in a circular path of radius 2cmIf the speed ofelectron is doubled - then the radius of the circular pathwill be [1991]

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