Plain-English Meaning
An ideal transformer steps voltage up or down in proportion to the ratio of coil turns.
Keep charge, field, potential, and current distinct. That single habit fixes a large fraction of electromagnetism errors.
Deeper Explanation
An ideal transformer steps voltage up or down in proportion to the ratio of coil turns.
Worked Example
Problem: A transformer has N_p = 500 turns and N_s = 100 turns. Input voltage is 240 V. Find V_s.
- V_s = V_p × N_s/N_p = 240 × 100/500 = 240 × 0.2 = 48 V
Result: V_s = 48 V
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At A Glance
Category: Electromagnetism
Levels covered:
Best use: Start with the formula meaning, then move to the worked example and quiz so the equation turns into a tool instead of a memorised line.