The Figure on the left hand side of the animation shows a voltmeter connected to a simple circuits. The wires are connected in such a way that the circuit possesses the shape of a rectangle. The vertical wire comprising the right side of the rectangle is capable of sliding along the two horizontal wires to which it is connected. The circuit is immersed in a magnetic field which is perpendicular to the page.
The graph on the right hand side of the animation shows the voltage read by the voltmeter as a function of time.
The animation repeats it self when the time equals 10.00. The time is displayed in the upper left hand corner of the animation.
You may control the motion of the vertical wire in one of two ways:
You may drag the vertical wire by checking the box marked "U Drag".
You may type in an expression for the motion of the wire in the text field marked x(t)=. Keep in mind the following points if you choose this method:
Make sure that the box marked "U Drag" in unchecked.
The x axis points to the right as usual. The coordinate x=0 lies midway along the length of the horizontal wires. The coordinate x=8 corresponds to the right ends of the horizontal wires. x=-8 corresponds to the x coordinate of the left vertical wire.
If you wish to keep the right vertical wire stationary, then type in a value between -8.0 and 8.0 in the text field.
Use t for the time variable.
Use an asterisk, i.e. *, to denote multiplication. For example, the animation will fail to recognize the expression 2.0+3t, but the animation will recognize the expression 2.0+3.0*t. The text field will become red if you enter an expression that it does not understand.
You may use the trigometric function sin and cos in your expression. For example, you may enter the expression 1.0+3.0*sin(pi*t/3.0) into the text field for x(t)=.
Use pi to denote the constant 3.14....
The magnetic field:
The magnetic field is perpendicular to the screen.
Red regions containing minus signs denotes areas in which the magnetic field is into the screen.
Blue regions containing plus signs denotes areas in which the magnetic field is out of the screen.
You may enter an expression for the magnetic field into the text field marked B(x,t)=. Keep in mind the following points while doing this:
You may use the trigometric function sin and cos in your expression. For example, you may enter the expression 1.0+3.0*sin(pi*x/2.0)*sin(pi*t/3.0) into the text field.
Use pi to denote the constant 3.14....
Use t for the time variable and x for the x variable.
The x axis points to the right as usual. The coordinate x=0 lies midway along the length of the horizontal wires. The coordinate x=8 corresponds to the right ends of the horizontal wires. x=-8 corresponds to the x coordinate of the left vertical wire.