Variation of current as voltage changes

Answer the following questions:

1. What conclusion was made about the graph of i (current)  against V (voltage in volts)
current is directly proportional to voltage applied; i µ V
current is inversely proportional to voltage applied; i µ V-1
current is directly proportional to the square of voltage applied; i µ V2
current is directly proportional to the cube of voltage applied; i µ V3
2. The current is doubled by doubling voltage because:
ions can travel faster through the wires
the bigger emf attracts the ions through the solution faster
double the number of electrons is available on the cathode
the solution now has less resistance.
3.Cations have a positive charge true false
4.Anions are attracted to the negative electrode true false
5.Cations carry charge from anode to cathode true false
6.Anions carry charge from cathode to anode true false
7.Increased emf moves electrons through the wires faster true false

(attempted)  (maximum 7)

Answer questions on the effect on current of changes in concentrationof solution, separation of electrodes.

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