The principal reason voltage is induced in the loops of a generator coil is that the
a. loops are rotating, changing the amount of magnetic field within the loops.
b. size of the loops is changing.
c. magnet's strength is changing.
d. magnet is rotating. e. all of the above

The principal reason voltage is induced in the loops of a generator coil is that the loops are rotating, changing the amount of magnetic field within the loops. The answer is letter A. For example, in a circuit, the electrons in the bulb will not move without the potential difference or voltage. When there is voltage, electric current occurs because there is a driving force for the electrons in the wire to move.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

spectral lines lyman is one set