What would make oppositely charged objects attract each other more? A. increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object

B. decreasing the positive charge of the positively charged object and decreasing the negative charge of the negatively charged object

C. increasing the distance between the positively charged object and the negatively charged object

D. maintaining the distance between the positively charged object and the negatively charged object

A. increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object

Explanation:

try viewing this article on charge interactions

https://www.physicsclassroom.com/class/estatics/Lesson-1/Charge-Interactions

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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