In an ideal 1:8 step-down transformer, at one instant the primary power is 10 kW and the secondary current is 25 A. Determine the primary voltage and the secondary voltage at that instant, and the resistance of the load in the secondary coil.
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- A coil has 2.55-Ω resistance and 121-mH inductance. If the current is 3.00 A and is increasing at a rate of 3.80 A/s , what is the potential difference across the coil at this moment?The magnetic flux through a coil is 2.50 mWb. The current in the coil is 1.00 A and has 100 turns of wiring. Determine the inductance of the coil.A student needs to reduce the percent power loss by 100 times by using a transformer. What would the type and required ratio for the transformer of the windings (primary:secondary)? O step-down: 1 to 10 Ostep-down: 10 to 1 O step-up: 10 to 1 step-up: 1 to 10
- If the voltage of the primary coil in a transformer is twice that of the voltage in the secondary coil, then the current in the secondary coil is ____ that of the primary coil. Question 4 options: four times twice as much the same as 1/2 as much 1/4 as much None of the other responses are correct.A transformer is to be used to provide power for a computer disk drive that needs 5.6 V (rms) instead of the 120 V (rms) from the wall outlet. The number of turns in the primary is 420, and it delivers 500 mA (the secondary current) at an output voltage of 5.6 V (rms). (a) Should the transformer have more turns in the secondary compared to the primary, or fewer turns? O There should be more turns in the secondary. O There should be fewer turns in the secondary. (b) Find the current in the primary. (c) Find the number of turns in the secondary. turnsConsider an ideal transformer that steps 120 volts up to 1000 volts. 2940 turns of wire. Determine the number of turns of wire in the primary coil. OA: 150 OB: 169 OC: 191 OD: 216 OE: 245 OF: 276 G: 312 OH: 353 The frequency is 60 Hz. The secondary coil has
- Please answer and box.A typical wall outlet voltage in the United States is 120 volts. Personal MP3 players require much smaller voltages, typically 302.1 mV. If the number of turns in the primary coil is 35753575, calculate the number of turns NS on the secondary coil of the adapter transformer.please use these description Read the section for moreinformation. The unit ofinductance is the “Henry,”symbolized “H”EMF = Electromotive force= VoltageAnswer must includecorrect units.
- What losses occur due to heat loss during the circulation of currents around the copper windings? It is the greatest loss in the operation of an electric transformer. please don't use Al answerIf two coils placed next to one another have a mutual inductance of 5.06 mH, what voltage is induced in one when the 2.00 A current in the other is switched off in 29.5 ms?