Indicate true or false in each of the following statements: 1. When the current
ID: 2103583 • Letter: I
Question
Indicate true or false in each of the following statements:
1. When the current in a coil varies an emf is generated.
2. An inductor, in which the electric current is changing, generates an emf whose sign would create a current that, if it flowed, would support the change in magnetic field creating the emf.
3. The current in a coil of wire can never change without generating an emf.
4. The energy of a magnetic field is proportional to the square of the rate of change of field.
5. An electric field exists in space where a magnetic field is changing.
Explanation / Answer
1)true
2)false
3)ture
4)false
5)true