A straight horizontal wire of mass 10mg ...

A straight horizontal wire of mass 10mg and length 1.0 m carries a current of 2.0 A. what minimum magnetic field B should be applied in the region so that the magnetic force on the wire may balance its weight?

Text Solution

Verified by Experts

mass =` 10 mg = 10^(-6) kg`
` length = 1m , I = 2A , B = ?`
Now` mg = iLB
rArr B = mg/ il = 4.9 xx 10 ^(-6) T`

Topper's Solved these Questions

MAGNETIC FIELD
HC VERMA|Exercise Objective 2|9 Videos
LIGHT WAVES
HC VERMA|Exercise Exercises|41 Videos
MAGNETIC FIELD DUE TO CURRENT
HC VERMA|Exercise Exercises|61 Videos

Similar Questions

Explore conceptually related problems

A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid-air by a uniform horizontal magnetic field B . What is the magnitude of the magnetic field?

A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid air by a uniform horizontal magnetic field B (figure). What is the magnitude of the magnetic field ?

A straight wire of mass 200g and length 1.5m carries a current of 2A. To suspend it in a air by a uniform horizontal magnetic field, value of required magnetic field is…. T

A straight wire of mass 150 g and length 2 m carries a current of 1.5 A. It is suspended in mid-air by a uniform horizontal magnetic field B (figure). What is the magnitude of the magnetic field ? (g=10ms^(-2))

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

A circular coil of a wire containing 100 turns each of radius 2cm carries a current of 0.20A. The magnetic field at the centre of the coil is…..

A circular coil of wire consisting of 100 turns, each of radius 4.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil ?

HC VERMA-MAGNETIC FIELD-Exercises

A wire, carrying a current i, is kept in the x-y plane along the curve...
Text Solution
|
A rigid wire consists of a semicircular portion of radius R and two s...
Text Solution
|
A straight horizontal wire of mass 10mg and length 1.0 m carries a cur...
Text Solution
|
Shows a rod PQ of length 20.0 cm and mass 200g suspended through a fix...
Text Solution
|
Two metal strips, each of length, each of length l, are clamped paral...
Text Solution
|
A matel wire PQ of mass 10g lies at rest on two horizontal metal rails...
Text Solution
|
A straight wire of length l can slide on two parallel plastic rails k...
Text Solution
|
Shows a circular wire-loop of radius a m carrying a current I, placed ...
Text Solution
|
Suppose that the radius of cross section of the wire used in the previ...
Text Solution
|
The magnetic field existing in a region is given by vecB =B0(1+(x)/(l)...
Text Solution
|
A conducting wire of length l, lying normal to a magnetic field B, mo...
Text Solution
|
A currrent I is passed through a silver strip of width d and area of...
Text Solution
|
A particle having a charge of 2.0X10^(-8) C and a mass of 2.0X10^(-10...
Text Solution
|
A proton describes a circle of radius 1 cm in a magnetic field of stre...
Text Solution
|
An electron having a kinetic energy of 100eV circulates in a path of r...
Text Solution
|
Protons having kinetic energy K emerge from an accelerator as a narrow...
Text Solution
|
A charged particle is accelerated thrught a potential difference of 12...
Text Solution
|
Doubly ionized helium ions are projected with a speed of 10kms^(-1) in...
Text Solution
|
A proton is projected with a velocity of 3X10^6 m s ^(-1) perpendicula...
Text Solution
|
(a) An electron moves along a circle of radius 1m in a perpendicular m...
Text Solution
|