A Step-Up Transformer. A transformer connected to a 120-V (rms) ac line is to supply 13,000 V (rms) for a neon sign. To reduce shock hazard, a fuse is to be inserted in the primary circuit; the fuse is to blow when the rms current in the secondary circuit exceeds 8.50 mA. (a) What is the ratio of secondary to primary turns of the transformer? (b) What power must be supplied to the transformer when the rms secondary current is 8.50 mA? (c) What current rating should the fuse in the primary circuit have?
A Step-Up Transformer. A transformer connected to a 120-V (rms) ac line is to supply 13,000 V (rms) for a neon sign. To reduce shock hazard, a fuse is to be inserted in the primary circuit; the fuse is to blow when the rms current in the secondary circuit exceeds 8.50 mA. (a) What is the ratio of secondary to primary turns of the transformer? (b) What power must be supplied to the transformer when the rms secondary current is 8.50 mA? (c) What current rating should the fuse in the primary circuit have?
A Step-Up Transformer. A transformer connected to a 120-V (rms) ac line is to supply 13,000 V (rms) for a neon sign. To reduce shock hazard, a fuse is to be inserted in the primary circuit; the fuse is to blow when the rms current in the secondary circuit exceeds 8.50 mA. (a) What is the ratio of secondary to primary turns of the transformer? (b) What power must be supplied to the transformer when the rms secondary current is 8.50 mA? (c) What current rating should the fuse in the primary circuit have?
When a P = 610 W ideal (lossless) transformer is operated at full power with an rms input current of I1 = 2.9 A, it produces an rms output voltage of V2 = 9.7 V.
What is the input voltage, in volts?
A neon sign transformer has a 520W520W AC output with an rms voltage of 17 kVkV when connected to a normal household outlet. There are 500 turns of wire in the primary coil.
How many turns of wire does the secondary coil have?
Express your answer as the number of the turns.
When the transformer is running at full power, what is the current in the secondary coil?
Express your answer in amperes.
The current in the primary coil?
Express your answer in amperes.
The primary winding of an ideal transformer is wound with 550 turns and is connected to a 220V rms supply. The secondary winding has a voltage is 20V rms and is terminated by a resistance of 200 Ω.
Calculate the current flowing in the primary winding.
Chapter 31 Solutions
University Physics with Modern Physics (14th Edition)
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