If the resistance in a circuit remains constant, what happens to the electric power when the current increases?
A. The power will increase.
OB. The power will decrease.
C.
There will be no power.
D. The current does not affect the power.

If the resistance in a circuit remains constant and the current increases, then the power will increase. (A)

In fact, it'll increase as fast as the square of the current !  Like, if the current somehow increases to 3 times as much, the circuit will start using 9 times as much power as it did before.

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: