1) Currents of 0.25 A and 0.95 A flow through the primary and secondary coils of a transformer respectively if there are 1.0x103 turns in the primary coil how many turns are in the secondary coil? (2.6x102)
2) A step-down transformer has coils of 1.20 x 103 and 1.5- x 102 turns. If the transformer is connected to a 1.20 x 102 V power line, and the current in the secondary coil is 5.00 A. what is the current in the primary coil? (0.625 A)
3) Near your home the voltage pf the power line is 3.6 x 103 V. The transformer between your home and the line reduces this voltage to 1.20 x 102 V. If the transformer is to deliver 2.4 x 103 J of energy each second to your house, what is the current in: a) the primary coil (0.67 A)
b) the secondary coil
(2.0x101A)
1
Physics 12
Name: ______________________
4) A step-down transformer (Np= 1.50 x 102, NS=25) is connected to a 1.20 x 102 V primary line. If there is a 75 electrical device placed in the secondary circuit, what is the current in the primary coil? (4.4x10-2A)
5) If the voltage and current of the primary coil is 1.20 x 102 V and 3.0 A, what is the power delivered to the secondary coil? (3.6x102W)
6) If the power delivered to the secondary coil of a step-up transformer is 5.0 x 101 W from a 1.20 x 102 V power line, what is the current in the primary coil? (0.42 A)
2
Physics 12
Name: ______________________
7) A transformer (Np= 5.5 x 102, NS=36) is connected to a 1.20 x 102 V power line. If the current in the primary coil is 1.0 A, what is the power in the secondary coil? (120 W)
8) A 100 W transformer (Ns = 1500) has an input voltage of 9.0 V and an output current of 0.65 A. How many turns are on the primary coil? (88)
(0.625 A). 3) Near your home the voltage pf the power line is 3.6 x 103 V. The transformer between your home and the. line reduces this voltage to 1.20 x 102 V. If the transformer is to deliver 2.4 x 103. J of energy each second to. your house, what is the current in: a) the primary coil (0.67 A). b) the secondary coil (2.0x101A).
actually do the job we expect it to do. So then, I am about to show you the easiest way I know to find the IMPEDANCE BATIO. First of all, IMPEDANCE RATIO ALWAYS REMAINS THE SAME regardless of frequency and power fod through the transfof Imer. The IMP
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