21. The SI unit of electric charge density is:
a) Coulomb per square meter
b) Farad
c) Ampere
d) Volt
Answer: a) Coulomb per square meter
22. The SI unit of electric current density is:
a) Ampere per square meter
b) Farad
c) Ohm
d) Volt
Answer: a) Ampere per square meter
23. The SI unit of magnetic flux is:
a) Weber
b) Tesla
c) Ampere
d) Ohm
Answer: a) Weber
24. The SI unit of magnetic field strength is:
a) Tesla
b) Weber
c) Ampere
d) Ohm
Answer: a) Tesla
25. The SI unit of inductance is:
a) Henry
b) Weber
c) Tesla
d) Volt
Answer: a) Henry
