26. What is the basic unit of inductance?
a) Ampere
b) Ohm
c) Volt
d) Henry
Answer: d) Henry
27. What is the formula for inductance?
a) L = N/I
b) L = I/N
c) L = N^2/I
d) L = I^2/N
Answer: a) L = N/I
28. What is the symbol for a transformer in a circuit diagram?
a) Straight line
b) Zigzag line
c) Circle
d) Arrow
Answer: d) Arrow
29. Which component is used to transfer electrical energy between two or more circuits?
a) Inductor
b) Capacitor
c) Resistor
d) Transformer
Answer: d) Transformer
30. What is the basic unit of power?
a) Ampere
b) Ohm
c) Volt
d) Watt
Answer: d) Watt
