yes indused emf is also called motional emf. If an open coil is subjected to a variable magnetic field, at the ends of the coil a potential difference is induced which is called induced emf. If a coil is connected… Full Answer
STATICALLY INDUCED EMF The emf induced in a coil due to change of flux linked with it (change of flux is by the increase or decrease in current) is called statically induced emf. Transformer is an example of statically induced… Full Answer
a shifting magnetic field exposed to a conductor will cause electric current through the conductor. For this reason, you can get shocked by a power pole by holding a copper rod underneath it parallel to the wires. the energy directly… Full Answer
when 2 different cpnducting materials r brought together and given a supply, there exist a potential difference between the 2.since these are 2 differt materials and an emf will be induced which is called thermo emf
During the operation of a DC motor, EMF is created across its terminals using an external source. Whereas, in a DC generator EMF is created across its terminal based on principle of dynamically induced EMF. So talking in terms of… Full Answer
Only the relative direction they are moving. EMF, measured in Volts, travels along a conductor, perhaps because a magnetic field has built up around the conductor. When that magnetic field collapses, CEMF, or counter-EMF is generated in the conductor, and… Full Answer
In dc motor, the armature conductors are revolving in the magnetic field and emf is induced in the armature conductors. The direction of the induced emf is in opposite direction to the applied voltage as per Flemings left hand rule… Full Answer
No. Because during charging process of a battery current flows in opposite direction to the discharging/consumption. so equation Emf=P.d. +Ir is changed to Emf=p.d. +Ir. Hence during charging process of a battery Potential difference is greater than electromotive force.
Gauss meter_ Sensitive AC Gauss meters and EMF meters for measuring AC magnetic fields (50 Hz & 60 Hz Emf) Magnetometer- an instrument used for measuring magnetic forces, especially the earth's magnetism.
In induction motors no seprate source is required to start the motor,and motor itself induces emf as the word induction clearly reflects it starting principle while in case of synchronous motors ,motor is synchronised with an external source of emf.
1) EMF of a battery is the amount of electrical energy required to move a unit positive charge from the negative to the positive terminal of the battery when the battery is open circuited, whereas, potential difference across the terminals… Full Answer
Scientists are still struggling on what are the sources of earth's magnetic field (EMF). The facts support the notion that the EMF has reversed its direction several times in earth's history. When the EMF reverses, the EMF intensity will be… Full Answer