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I was given this circuit in an Electricity & Magnetism course.

enter image description here

On the far left, is that a current source providing 2A? It seems to be but I'm not 100% sure.

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    $\begingroup$ Yes, that's an ideal current source. $\endgroup$ – garyp May 21 '16 at 19:17
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    $\begingroup$ Would Electrical Engineering be a better home for this question? $\endgroup$ – Qmechanic May 21 '16 at 19:39
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    $\begingroup$ It's a current source. The direction of the arrow indicates the direction of the current. Note that if it was an ideal galvanometer, it would short out the 40 Ohm resistor. $\endgroup$ – CuriousOne May 21 '16 at 19:42
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    $\begingroup$ Studying Kirchov's law? $\endgroup$ – Howard Miller May 21 '16 at 19:43
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    $\begingroup$ Your diagram can't be totally correct. The 2A current flow through the 10 ohm resistor will produce a voltage drop of 20V, which is more than the 12V battery in your diagram. $\endgroup$ – David White May 21 '16 at 20:22