Complete the following statement: The electromotive force is

A the maximum potential difference between the terminals of a battery.

B the force that accelerates electrons through a wire when a battery is connected to it.

C the force that accelerates protons through a wire when a battery is connected to it.

D the maximum capacitance between the terminals of a battery.

E the maximum electric potential energy stored within a battery.

The potential difference across the ends of a wire is doubled in magnitude. If Ohm's law is obeyed, which one of the following statements concerning the resistance of the wire is true?

A The resistance is one half of its original value.

B The resistance is twice its original value.

C The resistance is not changed.

D The resistance increases by a factor of four.

E The resistance decreases by a factor of four.

Which is the correct answer. No need to show your work.

Complete the following statement: The electromotive force is

A the maximum potential difference between the terminals of a battery.

B the force that accelerates electrons through a wire when a battery is

connected to it.

C the force that accelerates protons through a wire when a battery is

connected to it.

D the maximum capacitance between the terminals of a battery.

E the maximum electric potential energy stored within a battery.

The potential difference across the ends of a wire is doubled in

magnitude. If Ohm's law is obeyed, which one of the following statements

concerning the resistance of the wire is true?

A The resistance is one half of its original value.

B The resistance is twice its original value.

C The resistance is not changed.

D The resistance increases by a factor of four.

E The resistance decreases by a factor of four.

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