Question

A transformer is connected to a 200 V ac source. The transformer supplies 3000 V to a device. If the number of turns in the primary coil is 450, then the number of turns in its secondary coil is ______.

Options

• 30

• 450

• 4500

• 6750

Answer 1

A transformer is connected to a 200 V ac source. The transformer supplies 3000 V to a device. If the number of turns in the primary coil is 450, then the number of turns in its secondary coil is 6750.

Explanation:

Given: Secondary voltage (V_s) = 3000 V

Primary voltage (V_p) = 200 V

Number of turns in the primary coil (N_p) = 450

The number of turns in the secondary coil can be found using the transformer turns ratio.

`V_s/V_p = N_s/N_p`

Rearranging the formula for N_s:

N_s = `V_s/V_p xx N_p`

= `3000/200 xx 450`

= 15 × 450

= 6750

∴ The number of turns in the secondary coil is 6750 turns.