The rate of change of flux has which of the following units
A) farads B) joules C) volts D) m/s E) webers
A square loop is placed in a uniform magnetic field perpendicular to the plane of the loop as shown. The loop is 0.50 meters on a side and the magnetic field B has a strength of 2 T. If the loop is rotated through an angle of 90° in 0.1 second what would be the average induced EMF in the loop?
A) 0.025 C B) 0.40 V C) 5 V D) 10 V E) 80 V
Use ε = ΔФ / t
ε = ( BAf – BAi ) / t
ε = (0–(2)(0.5x0.5))/0.1
Two light wires are hung vertically. With electrical current in both wires directed upwards
A) the wires will experience a force of attraction
charge +e is a distance R from the wire and heading directly toward it, the
force on the proton is:
A uniform magnetic field B that is perpendicular to the plane of the page now passes through the loops, as shown. The field is confined to a region of radius a, where a < b, and is changing at a constant rate. The induced
emf in the wire loop of radius b is ε. What is the induced emf in the wire loop of radius 2b ?
(A) Zero (B) ε/2 (C) ε (D) 2ε (E) 4ε
Since both loops contain the same value of BA and it is changing the same for both of them, the
quantity ΔBA/t is the same for both so both have the same induced emf.
The figure shows a bar moving to the right on two conducting rails.
To make an induced current i in the direction indicated, in what direction would the magnetic field be in the area contained within the conducting rails?