Answer: (A) Lenz’s law. Lenz’s law is used for determining the direction of induced current. Lenz’s law of electromagnetic induction... View Article
directly proportional to the rate of change of magnetic flux.
total change of magnetic flux.
The eddy current in the conductor damp the oscillations of the coil.
The laminated iron core prevents the formation of eddy currents and thus reduces the loss of energy.
Foucault Current is another name of Eddy Current or Induced Current.
According to Lenz’s law the end A becomes North Pole to oppose the motion of the magnet.
Stronger magnetic field, thicker material and low resistivity material will increase the size and effect of eddy current whereas thinner... View Article
Which is not true for three-phase AC? The three-phase power supply has three distinct wave cycles. The voltage of three-phase... View Article
The amplitude of alternating e.m.f depends on the material of which generator is made of.
Induced e.m.f is given by it will be maximum when .
When the plane of the armature is parallel to the lines of force of magnetic field, the rate of change... View Article
A Van de graph generator is used to accelerate charged particles and sterilising food. Explanation A Van de Graaff generator is... View Article
Efficiency of electric motor is always less than 100%. Energy is wasted as heat.
In electromagnetic induction, line integral of induced field E around a close path is non zero, and induced electric field... View Article
Changing magnetic flux induces an e.m.f which results into induced current that is eddy current.
Fleming’s right hand rule is used to determine the direction of induced current in a generator.
Split rings do not form part of an alternator. It has slip rings.
Materials which obeys the ohm’s law shows a straight line in V-I graph. Since silver is the only ohmic material... View Article
The slope of the graph = I/V In case of T2, I/V is less. Hence, V/I (=R) is more. Value of... View Article
