Search
A long straight wire carries a current. The strength of the magnetic field, due to the wire, 10.0 cm from the axis of the wire is 20T . Determine the current in the wire.
A current of 2 A flowing through a coil of 100 turns gives rise to a magnetic flux of 5 × 10−5 Wb per turn. Calculate the magnetic energy associated with the coil
A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B such that B is perpendicular to the plane of the loop. Calculate the magnetic force acting on the loop.
An electric dipole, consisting of magnitude 2.80 nC separated by 4.60 m, is in a uniform electric field of magnitude 3400 N/C. (a) Calculate the magnitude of the electric dipole moment. (b) Calculate the difference in potential energy corresponding to dipole orientations parallel to and antiparallel to the electric field.
An electric dipole with dipole moment of magnitude 3.75 x 28 10 Cm is in an electric field of magnitude 9500 N/C. Compute the magnitude of the torque on the dipole when the dipole moment is (a) perpendicular to the electric field, (b) parallel to the electric field and (c) antiparallel to the electric field.
A straight wire, 0.05 m long, is placed in a uniform magnetic field of magnetic induction 0.04 T. The wire carries a current of 7.5 A, and makes an angle of 60° with the direction of the magnetic field. The arrow on the wire shows the direction of the electron current in the wire. (a) Calculate the magnitude of the force exerted on the wire. (b) Draw a sketch of the wire in the magnetic field and show the direction of the force. (c) Describe the conditions for this force to be a maximum.
What is gravitational accelearation.
Explain resistance
State the first law of thermodybamics.
What is friction force?
