For 10 points, name this term used for work per unit charge, often symbolized V.
A change in magnetic flux generates this quantity according to Faraday's law, and electric field is the negative partial derivative of this quantity with respect to x. An oscilloscope plots this quantity with respect to time, and Kirchoff's laws state that the net change in it around a loop in a circuit must be zero. Measuring this in a circuit requires an instrument with a very high resistance connected in parallel. For a point charge it is proportional to charge over radius, and it can also be referred to as potential difference. For 10 points, name this term used for work per unit charge, often symbolized V.
A change in magnetic flux generates this quantity according to Faraday's law, and electric field is the negative partial derivative of this quantity with respect to x. An oscilloscope plots this quantity with respect to time, and Kirchoff's laws state that the net change in it around a loop in a circuit must be zero.
Voltage [accept Electric Potential Difference before mention; accept EMF or Electromotive Force before "derivative"]