The primary coil of a transformer is coupled to DC power supply (a battery) that provides an electromotive force of 9V. The primary coil has 10 turns while the secondary coil has 100 turns. Determine the potential difference across the secondary coil. Provide your answer in Volts.
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The primary coil of a transformer is coupled to DC power supply (a battery) that provides an electromotive force of 9V. The primary coil has 10 turns while the secondary coil has 100 turns. Determine the potential difference across the secondary coil. Provide your answer in Volts.
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- A transformer consist of a primary coil connected to a 120 V source that drive 4 A of current through the primary and a secondary wire that contains 1/3 as many turns as the primary wire. What is the current in the secondary wire if the transformer is 80% efficient?A transformer is used to provide voltage to a neon sign. The input voltage is 120 V and the output voltage is 600 V. The number of turns on the primary coil of the transformer is 300. The current supplied to the transformer is 2.5 A. What is the number of turns on the secondary coil and the current used in the neon sign? a. The number of turns in the secondary coil is 240 and the current in the sign is 2.5 A b. The number of turns in the secondary coil is 60 and the current in the sign is 2.5 A c. The number of turns in the secondary coil is 240 and the current in the sign is 0.5 A d. The number of turns in the secondary coil is 60 and the current in the sign is 0.5 A e. The number of turns in the secondary coil is 1500 and the current in the sign is 0.5 AA transformer is used to charge a cell phone. The number of turns on the primary coil is 600. The voltage input is 120 V and the output needs to be 9.0 V. The output current is 40 milliamperes. What is the number of turns on the secondary coil and the current in the primary. Assume the transformer is 100% efficient. The number of turns on the secondary coil is 45 and the current in the primary is 533 milliamperes The number of turns on the secondary coil is 8000 and the current in the primary is 533 milliamperes The number of turns on the secondary coil is 45 and the current in the primary is 3.0 milliamperes. The number of turns on the secondary coil is 8000 and the current in the primary is 3.0 milliamperes
- A transformer consists of 295 primary windings and 834 secondary windings. Part A If the potential difference across the primary coil is 24.5 V, what is the voltage across the secondary coil? Express your answer in volts. V₂ = Submit Part B I = ΑΣΦ Submit Request Answer If the potential difference across the primary coil is 24.5 V, what is the current in the secondary coil if it is connected across a 115 resistor? Express your answer in amperes. 17 ΑΣΦ ? Request Answer V ? AThe power adapters of devices we use contain transformers. In one such adapter, the input to the transformer draws 1.8 A current when connected to the 120 Volt plug-point in our walls. The adapter/transformer is designed to output 5.0 A current. The input to the transformer (or primary) has a coil with 50 turns. a. What voltage is the output (secondary) providing? b. How many turns does the coil in the secondary (output) have? c. Suppose you know that the speed at which light can travel through a material is 2.5 × 10' m/s and that the magnetic permeability (u) of the material is 10-0 T.m/A. What is the electrical permittivity (e) of this material? [It is possible to answer this part without knowing how to answer parts (a) and (b). In fact, this question has nothing to do with "transformers".]An iron core transformer is as shown in the figure. The primary coil has Np = 2000 turns and the secondary coil has N, = 5000 turns. The primary coil is driven by an A.C. power source with an amplitude of 200 V at a frequency of 60 Hz. What is the amplitude of the potential across the secondary coil? Transformer Core Primary Coil Secondary Coil VP Np Ns Vs Transformer Construction
- A power plant produces a voltage of 6.0 kV and 150 A. The voltage is stepped up to 250 kV by a transformer before it is transmitted to a substation. What is the current in the transmission line from the plant to the substation?The power adapters of devices we use contain transformers. In one such adapter, the input to the transformer draws 1.8 A current when connected to the 120 Volt plug-point in our walls. The adapter/transformer is designed to output 5.0 A current. The input to the transformer (or primary) has a coil with 50 turns. a. What voltage is the output (secondary) providing? b. How many turns does the coil in the secondary (output) have?A transformer having efficiency of 90% is working on 200 V and3 kW power supply. If the current in the secondary coil is 6A, the voltage across the secondary coil and the current in the primary coil respectively are : a. 450 V,15 A b. 450V,13.5A c. 600 V,15 A d. 300 V,15 A
- A transformer consists of 275 primary windings and 834 secondary windings. If the potential difference across the primary coil is 25.0 V. what is the voltage across the secondary coil? Is this a step up or step down transformer? Explain. What is the effective load resistance of the secondary coil if it is connected across a 125 Ω resistor ?Spike left his car headlights on overnight and the battery has gone flat. Carly suggests that rather than using her car to recharge the battery they instead build a battery charger so he can do it himself. She suggests that he modify an old transformer that they don't need anymore to do the job. The old transformer has a primary coil of 309 turns. It will need to be connected to mains voltage (240 V) and put out a voltage of 11 V to charge the car battery. How many turns should Spike wind to make the secondary coil? (No decimals, no units)A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage to 330 kV. The secondary of this transformer is being replaced so that its output can be 775 kV for more efficient cross-country transmission on upgraded transmission lines. If the power output is 1,000 MW and line resistance is 2.3O N, what are the old and new line power losses (in MW)? old line losses MW new line losses MW