Home

Item 10:

When a coil (an inductance) with an inductivity L is connected to a voltage source, a voltage V L , due to self-inductance, is induced. The voltage V L is oriented opposite to the applied voltage V 0 and is proportional to the rate of change of the current I. Its time dependence is influenced by L. The internal resistance of the coil can be neglected.

Question:

Where can this time depending voltage V L be measured?

 

Please chose one or more of the following statements which correspond with what you know about this process.

 

  • 1) The voltage or potential difference which can be measured across any 2 points of the connecting wires a and b, is only influenced by V 0 and not by L.
  • 2) The time dependence of V L , influenced by L, can only be measured just outside of the coil ie. between 1a and 1b.
  • 3) The time dependence of V L , influenced by L, can be measured between 1a and 1b and around the points 2a and 2b but not between 3a and 3b.
  • 4) The time dependence of V L , influenced by L, can be measured all along the connectors a and b ie between all the pairs of measuring points 1ab, 2ab and 3ab.

next question