NEW
Font size
WorksheetsQuiz Transformer.2
Total questions: 10
Worksheet time: 5mins
A transformer converts _____.
AC to DC
One level of AC voltage to another
DC to AC
Electrical to mechanical energy
The part that connects to the supply source is called the _____ winding.
Primary
Secondary
Auxiliary
Control
The working principle of a transformer is based on _____.
Ohm’s Law
Faraday’s Law of Electromagnetic Induction
Joule’s Law
Kirchhoff’s Law
In a step-up transformer, secondary voltage is _____ than primary voltage.
Smaller
Equal
Larger
Zero
The losses in the winding are known as _____ losses.
Iron
Copper
Eddy current
Hysteresis
The open-circuit test is used to determine _____ losses.
Copper
Iron
Both copper & iron
No losses
The short-circuit test measures _____.
No-load current
Core loss
Copper loss and series impedance
Magnetizing reactance
Efficiency is defined as _____.
Input ÷ Output
Output ÷ Input
Input × Output
Loss ÷ Input
Voltage regulation should be kept _____ for better performance.
High
Low
Constant
Zero
The excitation current in a transformer is usually _____ compared to the load current.
Equal
Smaller
Larger
Random
