Question 491: AC fundamentals

Question

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux $$\phi $$ linked with the primary coil is given by $$\phi $$ = $$\phi $$0 + 4t, where $$\phi $$ is webers, t is time in seconds and $$\phi $$0 is a constant, the output voltage across the secondary coil is

Accepted Answer

Voltage across the primary,
V
p
= $${{d\phi } \over {dt}} = {d \over {dt}}\left( {{\phi _0} + 4t} ight) = $$ 4 volt
Also $${{{V_s}} \over {{V_p}}} = {{{N_s}} \over {{N_p}}}$$
Where, N
s = No. of turns across primary coil = 50
N
p
= No. of turns across secondary coil = 1500
$$ 	herefore $$ V
s
= $${{1500} \over {50}} 	imes 4$$ = 120 V

Answer

120 volt

Answer

220 volts

Answer

30 volts

Answer

90 volts.

AC fundamentals

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux $\phi linked with the primary coil is given by \phi = \phi 0 + 4t, where \phi is webers, t is time in seconds and \phi $0 is a constant, the output voltage across the secondary coil is

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