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An electromagnet crane is carrying the electromagnet with the help of the three cables. But the electromagnet is not stable because of the wind. What is science behind the cause?
The electric current of an electromagnet is switched off then the magnetic property of the electromagnet will-
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from
A type I superconductor is 1. A conductor of infinite conductivity at all temperatures. 2. A conductor with a very large conductivity below a critical temperature. 3. A material showing susceptibility -1 below the critical temperature. 4. A perfect conductor having conductivity drastically reduced by a critical current.
A dielectric and a conductor are placed in an external electric field of magnitude Eext. The charge density induced at the surface of the dielectric and the conductor are σd and σe respectively.  The net electric field inside the dielectric and the conductor are Ed and Ec respectively. Then, 
When a conductor is carrying AC current, the current is not distributed in the conductor uniformly. Rather it has tendency to concentrate near the surface of the conductor. What is this effect known as?
Determine the conductance (in Mho) of a conductor, when the value of current that flows through the conductor is 2 A and the potential difference between the ends of the conductor is 40 V.
Determine the conductance (in Siemens) of a conductor, when the potential difference between the ends of the conductor is 30 V and the current flowing through the conductor is 3 A
The variation of current 'I' with the voltage applied 'V' across the conductor is given by V = R sin(I), where R is the resistance of the conductor and I ∈ [0,\(\frac{\pi}{2}\)]. The conductor follow Ohm's law for all values of 'I' that are
Consider the following statements regarding a conductor and free space boundary: 1. No charge and no electric field can exist at any point within the interior of a conductor 2. The charge may appear on the surface of a conductor. Which of the above statements are correct?