Which of the following statements is false? Group of answer choices a. The change in potential between two points on an equipotential surface is zero b. The electric field is always perpendicular to equipotential surfaces c. The work done by the field on a charge that moves on an equipotential surface is zero d. The potential energy of a charge does not change if it moves on an equipotential surface e. Positive charges move from low to high potential if acted on only by the electric field.

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:

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i just did this and got a 100.

your answer is, orbit around the nucleus

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr