हिंदी

The unit Wbm-2 is equal to ______. - Physics

Advertisements
Advertisements

प्रश्न

The unit Wbm-2 is equal to ______.

विकल्प

  • henry

  • watt

  • dyne

  • tesla

MCQ
रिक्त स्थान भरें

उत्तर

The unit Wbm-2 is equal to tesla.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2021-2022 (March) Set 1

संबंधित प्रश्न

Use this law to find magnetic field due to straight infinite current carrying wire.


The electric current flowing in a wire in the direction from B to A is decreasing. Find out the direction of the induced current in the metallic loop kept above the wire as shown.


A rod of length l is moved horizontally with a uniform velocity 'v' in a direction perpendicular to its length through a region in which a uniform magnetic field is acting vertically downward. Derive the expression for the emf induced across the ends of the rod.


A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire.


A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line?


Obtain an expression for magnetic flux density B at the centre of a circular coil of radius R, having N turns and carrying a current I


Define one tesla using the expression for the magnetic force acting on a particle of charge q moving with velocity \[\vec{v}\]  in a magnetic field \[\vec{B}\] .


A circular coil of N turns and radius R carries a current I. It is unwound and rewound to make another coil of radius R/2, current I remaining the same. Calculate the ratio of the magnetic moments of the new coil and original coil.


Two wires carrying equal currents i each, are placed perpendicular to each other, just avoiding a contact. If one wire is held fixed and the other is free to move under magnetic forces, what kind of motion will result?


A charged particle is in motion having initial velocity `vecv` when it enters into a region of uniform magnetic field perpendicular to `vecv`. Because of the magnetic force the kinetic energy of the particle will ______.


According to the right-hand rule, the direction of magnetic induction if the current is directed in an anticlockwise direction is ______   


Explain "Magnetic force never does any work on moving charges". 


A charged particle is released from rest in a region of steady and uniform electric and magnetic fields which are parallel to each other. The particle will move in a ____________.


A very high magnetic field is applied to a stationary charge. Then the charge experiences ______.


An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight line path.


A magnetic field set up using Helmholtz coils is uniform in a small region and has a magnitude of 0.75 T. In the same region, a uniform electrostatic field is maintained in a direction normal to the common axis of the coils. A narrow beam of (single species) charged particles all accelerated through 15 kV enters this region in a direction perpendicular to both the axis of the coils and the electrostatic field. If the beam remains undeflected when the electrostatic field is 9.0 × 10–5 V m–1, make a simple guess as to what the beam contains. Why is the answer not unique?


Lorentz Force generally refers to ______.


Correct unit of magnetic field is ______.


A particle of mass m and charge q enters a magnetic field B perpendicularly with a velocity v. The radius of the circular path described by it will be ______.

A magnetic field exerts no force on


Consider a wire carrying a steady current, I placed in a uniform magnetic field B perpendicular to its length. Consider the charges inside the wire. It is known that magnetic forces do no work. This implies that ______.

  1. motion of charges inside the conductor is unaffected by B since they do not absorb energy.
  2. some charges inside the wire move to the surface as a result of B.
  3. if the wire moves under the influence of B, no work is done by the force.
  4. if the wire moves under the influence of B, no work is done by the magnetic force on the ions, assumed fixed within the wire.

Show that a force that does no work must be a velocity dependent force.


A charged particle of charge e and mass m is moving in an electric field E and magnetic field B. Construct dimensionless quantities and quantities of dimension [T]–1.


A long straight wire carrying current of 25 A rests on a table as shown in figure. Another wire PQ of length 1 m, mass 2.5 g carries the same current but in the opposite direction. The wire PQ is free to slide up and down. To what height will PQ rise?


A 100 turn rectangular coil ABCD (in XY plane) is hung from one arm of a balance (Figure). A mass 500 g is added to the other arm to balance the weight of the coil. A current 4.9 A passes through the coil and a constant magnetic field of 0.2 T acting inward (in xz plane) is switched on such that only arm CD of length 1 cm lies in the field. How much additional mass ‘m’ must be added to regain the balance?


An electron is moving along positive x-axis in a magnetic field which is parallel to the positive y-axis. In what direction will the magnetic force be acting on the electron?


Two long parallel current-carrying conductors are 0.4 m apart in air and carry currents 5 A and 10 A. Calculate the force per metre on each conductor, if the currents are (a) in the same direction and (b) in the opposite direction.


State dimensions of magnetic field.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×