• 4 Questions
An automobile with a radio antenna 1.0 m long travels at 100.0 km/h in a location where the Earth’s horizontal magnetic field is T. What is the maximum possible emf induced in the antenna due to this motion?
A coil with 50 turns and area 10 cm2 is oriented with its plane perpendicular to a 0.75-T magnetic field. If the coil is flipped over (rotated through ) in 0.20 s, what is the average emf induced in it?
The rod shown below moves to the right on essentially zero-resistance rails at a speed of . If everywhere in the region, what is the current through the 5.0- resistor?
The conducting rod shown in the accompanying figure moves along parallel metal rails that are 25-cm apart. The system is in a uniform magnetic field of strength 0.75 T, which is directed into the page. The resistances of the rod and the rails are negligible, but the section has a resistance of 0.25 Ω.
What is the magnitude of the emf induced in the rod when it is moving to the right with a speed of 5.0 m/s?
What force is required to keep the rod moving with a speed of 5.0 m/s?
What is the rate at which work is done by the force required to keep the rod moving with a speed of 5.0 m/s?
What is the power dissipated in the resistor?