Question

There are 8000 turns on the primary coil and 200 turns on the secondary coil of the transformer. The primary coil is connectd to a 240 v mains supply, suggest whether this transformer is a step up or step down transformer

Answer 1

Answer: Step down

Step-by-step explanation:

Given

No of turns on the primary coil is
`N_p=8000`

No of turns on the secondary coil is
`N_s=200`

Primary is connected to the voltage
`V_p=240\ V`

According to the turns rule

`\Rightarrow (N_p)/(N_s)=(V_p)/(V_s)\\\\\Rightarrow (8000)/(200)=(240)/(V_s)\\\\\Rightarrow V_s=(240)/(40)\\\\\Rightarrow V_s=6\ V`

As the voltage drops from 240 V to 6 V. Therefore it is a step-down transformer.