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electromagnetic
17) Transformers: (5 pts) The voltage across a local transmission line is about 12,000 V....
Suppose there are two transformers between your house and the high-voltage transmission line that distributes the...
Suppose there are two transformers between your house and the high-voltage transmission line that distributes the power. In addition, assume your house is the only one using electric power. At a substation the primary of a step-down transformer (turns ratio = 1:24) receives the voltage from the high-voltage transmission line. Because of your usage, a current of 62.5 mA exists in the primary of the transformer. The secondary is connected to the primary of another step-down transformer (turns ratio =...
5. (10 pts) A transformer is designed to have an output voltage of 1350 V (rms)...
5. (10 pts) A transformer is designed to have an output voltage of 1350 V (rms) when the primary coil is connected to a 150V (rms) source. (i) Is this a step-up or step-down transformer? f there are 2700 turns on the secondary winding (coil), how many turns are required on the primary? (ii) If a load resistor across the secondary draws a peak current of 1.5.A, what is the peak and the rms current in the primary?
The step-down transformer in a local neighborhood reduces the voltage from a 1,680 V line to...
The step-down transformer in a local neighborhood reduces the voltage from a 1,680 V line to 120 V. (a) If there are 175 loops on the secondary, how many are on the primary coil? ______ loops (b) What current does the transformer draw from the line if the current in the secondary is 36.0 A? ________ A (c) What are the power input and output? Input: _______ W Output: ________ W
Electricity is distributed from electrical substations to neighborhoods at 1.6×104 V . This is a 60Hz...
Electricity is distributed from electrical substations to neighborhoods at 1.6×104 V . This is a 60Hz oscillating (AC) voltage. Neighborhood transformers, seen on utility poles, step this voltage down to the 120V that is delivered to your house. How many turns does the primary coil on the transformer have if the secondary coil has 120 turns? No energy is lost in an ideal transformer, so the output power Pout from the secondary coil equals the input power Pin to the...
transformers
Learning Goal: To understand the concepts explaining the operation of transformers.One of the advantages of alternating current (ac) over direct current (dc) is the ease with which voltage levels can be increased or decreased. Such a need is alwayspresent due to the practical requirements of energy distribution. On the one hand, the voltage supplied to the end users must be reasonably low for safety reasons(depending on the country, that voltage may be 110 volts, 220 volts, or some other value...
A step-down transformer produces a voltage of 6.1 V across the secondary coil when the voltage...
A step-down transformer produces a voltage of 6.1 V across the secondary coil when the voltage across the primary coil is 130 V . What voltage appears across the primary coil of this transformer if 130 V is applied to the secondary coil?
A step-down transformer produces a voltage of 5.4 V across the secondary coil when the voltage...
A step-down transformer produces a voltage of 5.4 V across the secondary coil when the voltage across the primary coil is 140 V. What voltage appears across the primary coil of this transformer if 140 V is applied to the secondary coil?
0Electricity is distributed from electrical substations to neighborhoods at 1.6×104 V . This is a 60Hzoscillating...
0Electricity is distributed from electrical substations to neighborhoods at 1.6×104 V . This is a 60Hzoscillating (AC) voltage. Neighborhood transformers, seen on utility poles, step this voltage down to the 120V that is delivered to your house. a,) How many turns does the primary coil on the transformer have if the secondary coil has 150 turns? b.) No energy is lost in an ideal transformer, so the output power Pout from the secondary coil equals the input power Pin to...
A step-down transformer produces a voltage of 5.9 V across the secondary coil when the voltage...
A step-down transformer produces a voltage of 5.9 V across the secondary coil when the voltage across the primary coil is 140 V . Part A What voltage appears across the primary coil of this transformer if 140 V is applied to the secondary coil? Express your answer using two significant figures.
Electricity is distributed from electrical substations to neighborhoods at 1.3×104 V . This is a 60Hz...
Electricity is distributed from electrical substations to neighborhoods at 1.3×104 V . This is a 60Hz oscillating (AC) voltage. Neighborhood transformers, seen on utility poles, step this voltage down to the 120Vthat is delivered to your house. Express your answer using two significant figures. Q1: How many turns does the primary coil on the transformer have if the secondary coil has 140 turns? Q2: No energy is lost in an ideal transformer, so the output power Pout from the secondary...
5. (10 pts) A transformer is designed to have an output voltage of 1350 V (rms) when the primary coil is connected to a 150V (rms) source. (i) Is this a step-up or step-down transformer? f there are 2700 turns on the secondary winding (coil), how many turns are required on the primary? (ii) If a load resistor across the secondary draws a peak current of 1.5.A, what is the peak and the rms current in the primary?
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