1. The electromagnetic field produced around the coil is directly proportional to:
a. magnitude of the applied current
b. Rate of change in current
c. Coil parameters
d. All of the above

2. Electrical current is defined as the movement of electrons through a conductor.
a. True
b. False

3. The unit of electromagnetic force is called ampere.
a. True
b. False

4. The unit of resistance is:
a. Ohm
b. Volt
c. Ampere
d. All of the above

5. Ohm's law is stated in the following mathematical equation:
a. I=ER
b. E=IR
c. R=I2E
d. E=I2R

6. The resistance of a coil is determined by the length of wire used to wind a coil.
a. True
b. False

7. The frequency of an alternating current is defined as the number of cycles of current that occur in one minute.
a. True
b. False

8. The opposition to changes in alternating current flow through a coil is called:
a. Resistance
b. Impedance
c. Inductive reactance
d. Voltage

9. The unit of impedance is:
a. Volt
b. Henry
c. Ampere
d. Ohm

10. Resistance and the inductive reactance cause results that occur 90○ out of phase with each other.
a. True
b. False