Factors determining the sensitivity of a galvanometer

[Asmaa Mohammad]

Homework Statement

A galvanometer is connected to a solenoid, and there is a magnet bar entering the solenoid to induce an emf. What factors determine the displacement of the pointer of the galvanometer?

Homework Equations

emf (induced) = -N ΔΦ/ Δt
sensitivity of the galvanometer = θ/i

The Attempt at a Solution

That might be an easy question, but my textbook doesn't give me the answer and I would like to make sure of my solution.
When I read the question I though in various factor:
1. The rate of change of magnetic flux.
2. The number of turns of the solenoid.
3. The resistance of the solenoid.
4. The sensitivity of the galvanometer.
I just don't know how to pick the suitable factors to put in my exam, and the most convenient ones for the case mentioned above, i.e. a magnetic bar entering the solenoid to induce an emf.
So what is the best answer to the question?

 

[cnh1995]

The rate of change of magnetic flux

Or the speed of the magnet. It is measurable.

2. The number of turns of the solenoid.
3. The resistance of the solenoid.
4. The sensitivity of the galvanometer.

..and the resistance of the galvanometer.

 

[Asmaa Mohammad]

Or the speed of the magnet. It is measurable.

..and the resistance of the galvanometer.

All of them are appropriate?

 

[rude man]

You could add the direction of the magnet's motion. Which direction will the galvanometer deflect if the magnet is (1) pushed in, and (2) pulled out? What about the direction of leaving the solenoid in each directon?

 

[cnh1995]

All of them are appropriate?

Yes.

The number of turns of the solenoid.

Or the inductance of the solenoid. It includes all the physical parameters like number of turns, area, length, permeability etc.