Drag the wire.

The animation shows a top view of four wires in a conducting loop and a galvanometer.  Determine the direction of the magnetic field,  Bz(x), passing through the wires at various postions by click-dragging the black wire back and forth and observing the galvanometer reading.  Current flowing into the + terminal, i.e., counterclockwise in the loop, will deflect the meter to the right.   Start.

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Script Example

<script language="JavaScript"> 
function prob(){
    document.Faraday.setDefault();
    document.Faraday.setFieldFunction("sin(0.5*x)");
    document.Faraday.setPosFunction("10");
    document.Faraday.setMaxTime(10);
    document.Faraday.setCycle(true);
    document.Faraday.start();
}
</script>