engineering recuitment PGCIL Junior Technician Trainee (Electrician) Mock Test 2023 Electrical Machines Transformer
In relation to a transformer the ratio 20 : 1 indicates that _____.
1
There are 20 turns on primary and one turns on secondary
2
Primary voltage is 1/20th of secondary voltage
3
Primary current is 20 times greater than secondary current
4
For every 20 turns on primary, there is one turn on secondary