- #1
Taniaz
- 364
- 1
Homework Statement
Two coils P and Q are placed close to one another. P is connected to a power supply whereas Q is only connected to a voltmeter and no supply (see attached diagram). The current in coil P is constant. An iron rod is inserted into coil P.
a) Explain why during the time that the tod is moving, there is a reading on the voltmeter connected to coil Q.
b) The current in coil P is now varied as shown in the figure ( see attached). Show the variation with time of the reading of the voltmeter connected to coil Q from time t=0 to time t=t2.
Homework Equations
Faraday’s law
Lenz’s law
The Attempt at a Solution
I don’t have any issues with part a- the iron rod changes the flux in Q which creates an induced E and an induced I.
In part b, when the current in P in constant, I know the emf induced in Q will be 0. But when the current is intially increasing why is the induced emf constant? And I don’t know what happens when there is a sudden change in the current near t1.
Thank you.