Question 218: AC fundamentals

Question

A transformer consisting of 300 turns in the
primary and 150 turns in the secondary gives
output power of 2.2 kW. If the current in the
secondary coil is 10A, then the input voltage
and current in the primary coil are :

Accepted Answer

Given N
P
= 300, N
s
= 150, P
0
= 2200W
I
s
= 10 A
P
0
= V
0
I
0
$$ \Rightarrow $$ 2200 = V
0
ÃÂ 10 $$ \Rightarrow $$ V
0
= 220 V
$$ \because $$ $${{{V_i}} \over {{V_0}}} = {{{N_P}} \over {{N_S}}} \Rightarrow {V_i} = 2 	imes 220 = 440\,V$$
Also, P
0
= V
i
I
i
$$ \Rightarrow {I_i} = {{2200} \over {440}} = 5A$$

Answer

220 V and 20 A

Answer

220 V and 10A

Answer

440 V and 5A

Answer

440 V and 20 A

AC fundamentals

A transformer consisting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2 kW. If the current in the secondary coil is 10A, then the input voltage and current in the primary coil are :

Choose the correct answer: