Problems
practice
- Write something.
- Write something.
- Write something.
- Write something completely different.
conceptual
- Indicate the direction of induced current in the circular loop of wire if the strength of the magnetic field…
- increases
- decreases
- remains the same
- Indicate the direction of induced current in the solenoid as the bar magnet is moved to the right.
- Why do electric motors burn out if they are switched on but not allowed to rotate?
numerical
- It has been said that large numbers of payloads could be launched relatively economically from the surface of a moon, asteroid, or planet with a tenuous atmosphere using an electromagnetic rail gun. Work out the details of such a device located on Earth's moon. Determine…
- the escape velocity from the surface of the moon.
- the current needed for a 1 m wide, 0.1 Ω rail gun to reach the velocity calculated in part a in a 5 T magnetic field (disregarding friction)
- the power consumed when the rail gun is operating at top speed
- the minimum length of the rail gun if its average acceleration should not excede 3 g