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A transformer is having 2100 turns in primary and 4200 turns in secondary. An A.C. source of 120 V, 10 A is connected to its primary, the secondary voltage and current are …….

Answer»

240 V, 5 A
120 V, 10 A
240 V , 10 A
120 V, 20 A

Solution :`N_1`=2100, `N_2`= 4200, `epsilon_1`= 120 V, `I_1`= 10 A
`epsilon_2/epsilon_1=N_2/N_1`
`THEREFORE epsilon_2/120=4200/2100`
`therefore epsilon_2`= 240 V
`I_2/I_1=N_1/N_2`
`therefore I_2/10=2100/4200`
`therefore I_2`= 5A


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