6. Calculate the voltage output by the secondary winding of a transformer if the primary voltage is 50 V, the secondary winding has 1500 turns, and the primary winding has 400 turns.
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- (a) The plug-in transformer for a laptop computer puts out 7.50 V and can supply a maximum current of 2.00 A. What is the maximum input current if the input voltage is 240 V? Assume 100% ef?ciency. (b) If the actual efficiency is less man 100%, would the input current need to be greater or smaller? Explain.What is the resonant frequency of a 0.500 mH inductor connected to a 40.0 (F capacitor?A step-up transformer is designed so that the output of its secondary winding is 2000 V(rms) when the primary winding is connected to a 110-V (rms) line voltage, (a) If there are 100 turns in the primary winding, how many turns are there in the secondary winding? (b) If a resistor connected across the secondary winding draws an rms current of 0.75 A. what is the current in die primary winding?
- What is the peak power consumption of a 12G-V AC microwave over that draws 10.0A?A transformer has 410 turns in the primary coil and 170 in the secondary coil. By what factor does it change the voltage? Assume 100% efficiency. By what factor does it change the current?A step-down transformer produces a voltage of 6.0 V across thesecondary coil when the voltage across the primary coil is 120 V.What voltage appears across the primary coil of this transformer if120 V is applied to the secondary coil?
- consider a simple transformer that has a 100 turn primary coil and a 1000 turn secondary coil. The primary is connected to 120 volts ac source and the secondary is connected to an electrical device with a resistance of 200 ohms. what will be the voltage output of the secondary? what current flows in the secondary circuit? now that you know the voltage and the current, what is the power in the secondary coil? neglecting small heating losses, and knowing that energy is conserved, what is the power in the primary coil? now that you know the power and the voltage across the primary coil, what is the current drawn by the primary coil?12. A 600 kVA, 2000/200V transformer has a primary winding resistance of 0.6Ω and a secondary winding resistance of 0.001 Ω. The iron loss is 1.6 kW. If the power factor of the load is 0.8, determine the efficiency of the transformer on half load. Also, find the regulation, if the secondary voltage is 183V.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
- An ideal 15-kVA transformer has 300 turns on the primary winding and 50 turns on the secondary winding. The primary is connected to 2000V, 60HZ supply. Determine: Primary and secondary currents in full loadA 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 ?The output current of a transformer in which the voltage is stepped down is usually higher than the input current. Explain why?