Answer
$\frac{1}{3}$
3 times
Work Step by Step
Because the secondary has fewer turns than the primary, this is a step-down transformer. Use equation 21-6 to find the voltage ratio.
$$\frac{V_S}{V_P}=\frac{N_S}{N_P}$$
$$=\frac{120 turns}{360 turns}=\frac{1}{3}$$
From equation 21–7 we see that the current ratio is the reciprocal, 3.0. The secondary current is 3.0 times the primary current.