Atoroid is constructed from insulated copper wire that has diameter 1mm. the cross-sectional diameter of the toroid is 1 cm. the radius of the toroid as measured to the center of its cross-section is 10.5 cm. the resistivity of copper is 1.7 x 10-6 ω-cm.
a) how many turns are there on this toroid?
b) calculate its self-inductance.
c) what is the energy stored in the toroid for an applied potential difference
of 0.1 v ?
d) what would be the value of a capacitor that would store the same energy if it was also charged to 0.1 v ?

Aweather forecaster uses doppler radar to predict the track of a storm near the town of meadowlands. when the doppler signal is pointed at the storm from the town's center, the frequencies of the waves appear to be decreasing. what should the weather forecaster predict? a. that the storm will move around the edges of meadowlands without hitting the tosis center o b. that residents should be prepared, because it is impossible to know whether the storm will hit o c. that the storm is moving toward meadowlands and that residents should be prepared d. that the storm is moving away from meadowlands and is not likely to hit the town