ICSE BoardEnglish MediumSTD 10PhysicsElectro-Magnetism1 Mark
MCQ
In a step up transformer:
A
$N_s=N_p$
B
$N_s < n_p$
✓
$N_s>N_p$
D
nothing can be said
✓
Answer
Correct option: C.
$N_s>N_p$
$N_s>N_p$ Hint : Since a step-up transformer is used to change a low voltage alternating e.m.f. to a high voltage alternating e.m.f. of same frequency, the number of turns in the secondary coil is more than the number of turns in the primary coil, i.e. $N_s>N_p$
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