An object is hung using a metal spring. If now a current is ...

[krzymel]

An object is hung using a metal spring. If now a current is passed through the spring, what will happen to this system?
 
  A) The spring will begin to swing like a pendulum.
  B) The spring will extend, lowering the weight.
  C) The spring will contract, raising the weight.
  D) The weight will not move.
  E) None of these are true.

Question 2

You are given a copper bar of dimensions 3 cm  5 cm  8 cm and asked to attach leads to it in order to make a resistor. If you want to achieve the largest possible resistance, you should attach the leads to the opposite faces that measure
 
  A) 3 cm  5 cm.
  B) 3 cm  8 cm.
  C) 5 cm  8 cm.
  D) Any pair of faces produces the same resistance.

[kaillie]

Answer to Question 1

C

Answer to Question 2

A

[krzymel]

Thank you!

[kaillie]

Always glad to help...