Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain the Lenz Law
An induced current always flows in a direction so that its electromagnetic field opposes the change in magnetic flux producing it. This is embodied in the negative sign on the right side of Faraday's Law. If this were not true, if the induced current could be in the same direction as the change in flux causing it, then we would have a system which would make the flux bigger and bigger with no end in sight - this is not likely to happen if energy is conserved.
The magnet moved into the coil, the induced current in the coil has to make the electromagnet of the coil repel the magnet being moved towards it. So, if the coil shown is wound counter- clockwise when viewed from the right side, the positive induced current would go counterclockwise in the circuit to create an electromagnet, which has a magnetic field opposite the one in the permanent magnet--so it will repel the permanent magnet.
Try example of the magnet moved out of the coil. Which direction is the induced current in the circuit?
Answer - No peeking until you have tried on your own! Now that you have given it a try, check your answer against this. The magnet is being pulled out of the coil so that the electromagnet caused by the induced current must be in the direction that attracts the permanent magnet. This means that the induced current must flow from the left to the right side of the solenoid, and the right hand curls from the back to the front of the solenoid to make an electromagnet with its magnetic field pointing to the right, the direction of your right thumb. The induced current flows clockwise in the circuit.
Q. If 6.25 X 10 18 electrons flow through a given cross-section in unit time, find the current. Solution: Current I = q / t = ne / t = (6.25 X 10 18X 1.6 X 10 -19) / 1 = 1 A
Three similar coils, each having a resistance of 8 and an inductive reactance of 8 are connected (a) in star and (b) in delta, across a 415V, 3-phase supply. Measure for
CAN YOU GIVE SOME EXAMPLE OF FREE FALL ACTIVITIES
What are the ir frquencies of various functional groups
what condition is necessary for heat transfer occur
NEWTON'S SECOND LAW OF MOTION: This law states that "A force applied on body produce acceleration in its own direction. The acceleration differs directly with the applied force
Regard as a capacitor which is charged to 12 volts and then connected across a resistor. Allow t1/2 be the time it takes for the voltage to drop down to 6 volts. Presume the experi
Q. Double convex lenses are to be manufactured from a glass of refractive index1.55, With both faces of the same radius of curvature. What is the radius of curvature? Required if
Although one of the easiest methods for verifies the value of g at a place a simple pendulum suffers from a number of limitations, the more significant of which are the following:
The average distance of an electron in an atom from its nucleus is of the order of: (1) 10 6 m (2) 10 -6 m (3) 10 -10 m (4)10 -15 m Ans: (3) 10 -10 m
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd