An ideal transformer reduces the mains voltage from to for a domestic appliance

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

An ideal transformer reduces the mains voltage from

240\,\text{V}

120\,\text{V}

for a domestic appliance. Which statement about the currents in the two windings is correct? (a)

I_s = \dfrac{1}{2}I_p

(b)

I_s = I_p

(c)

I_s = 2 I_p

(d)

I_s = 4 I_p