Transformers Exam Questions And Answers 2025.

Transformers Exam Questions And Answers 2025. Why do we need transformers? - Correct Answer -to supply us with power How many volts are supplied by the dept for the xray tube? - Correct Answer - 110 - 220 What principle does transformers work on? - Correct Answer -electromagnetic mutual induction What is the coil connected to the tube called? - Correct Answer -secondary coil or output side State the transformer law. - Correct Answer -secondary voltage is to primary voltage as the number of turns in the secondary coil is to the number of turns in the primary coil How does step up & step down transformers affect voltage? - Correct Answer -step up increases voltage -step down decreases voltage Describe the turns on step up transformers. - Correct Answer -there are more turns on the secondary side than the primary side what does turns refer to? - Correct Answer -number of coils what is turn ratio? - Correct Answer -number of sec. coils to number of primary coils What should be first in turn ratio? - Correct Answer -secondary turns How does voltage affect power? - Correct Answer -indirect relationship (voltage goes up, power goes down) Name the types of transformers. - Correct Answer -Air Core -Open Core -Closed Core -Shell Type Describe Air Core transformers. - Correct Answer -two insulated wires side by side -simplest type -least effective Why are air transformers least effective? - Correct Answer -low magnetic field due to air Describe open core transformers? - Correct Answer -iron core inserted into two coils