Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Textbook Question
Chapter 14, Problem 12P
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 6 V ac?
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DC 200 V is applied to the primary of a transformer with a conversion ratio of 1/5. From secondaryExplain the reason for this by writing the voltage value to be made?
Which of the following are power losses that can
occur in a practical transformer (non-ideal)?
copper loss
O loss due to eddy currents
V hysteresis loss
O voltage drop due to coil material
A 200 V/100 V, 50 Hz transformer is to be excited at 40 Hz from 100 V side. For the exciting current to be same, the applied voltage should be ?
Chapter 14 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 14 - An ideal transformer delivers the same power to...Ch. 14 - Dots on the schematic symbol of a transformer show...Ch. 14 - A step-down transformer has more turns in the...Ch. 14 - The primary current in a transformer is always...Ch. 14 - Prob. 5TFQCh. 14 - Impedance-matching transformers allow maximum...Ch. 14 - Prob. 7TFQCh. 14 - A balun is a form of impedance-matching...Ch. 14 - Power transformers are typically rated in VA...Ch. 14 - Transformer efficiency is the ratio of output...
Ch. 14 - A transformer is used for dc voltages ac voltages...Ch. 14 - Which one of the following is affected by the...Ch. 14 - Prob. 3STCh. 14 - Prob. 4STCh. 14 - Prob. 5STCh. 14 - Prob. 6STCh. 14 - Prob. 7STCh. 14 - Prob. 8STCh. 14 - Prob. 9STCh. 14 - Prob. 10STCh. 14 - Prob. 11STCh. 14 - Prob. 12STCh. 14 - Prob. 13STCh. 14 - Prob. 14STCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - What is the turns ratio of a transformer having...Ch. 14 - Prob. 4PCh. 14 - Prob. 5PCh. 14 - If 120 V ac are connected to the primary of a...Ch. 14 - Prob. 7PCh. 14 - Prob. 8PCh. 14 - For each transformer in Figure 14-46, draw the...Ch. 14 - Prob. 10PCh. 14 - Prob. 11PCh. 14 - How many primary volts must be applied to a...Ch. 14 - Prob. 13PCh. 14 - Prob. 14PCh. 14 - Prob. 15PCh. 14 - If RL is doubled in the circuit of Figure...Ch. 14 - Prob. 17PCh. 14 - Determine the following quantities in Figure...Ch. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Prob. 22PCh. 14 - For the circuit 14-54, find the turns ratio...Ch. 14 - Prob. 24PCh. 14 - Prob. 25PCh. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 31PCh. 14 - Prob. 32PCh. 14 - Prob. 33PCh. 14 - Prob. 34PCh. 14 - Prob. 35PCh. 14 - Prob. 36PCh. 14 - Prob. 37PCh. 14 - Prob. 38PCh. 14 - For the loaded, tapped-secondary transformer in...Ch. 14 - Prob. 40PCh. 14 - Determine the voltage measured by each voltmeter...Ch. 14 - Prob. 42PCh. 14 - Prob. 43PCh. 14 - Prob. 44PCh. 14 - Prob. 45PCh. 14 - Prob. 46PCh. 14 - Prob. 47PCh. 14 - Prob. 49P
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- For an ideal transformer, the efficiency is (a) 0 (b) 100 (c) 50arrow_forwardDue to the increase in load, what change you saw in the transformer’s output power and the efficiency?arrow_forwardThe main difference between transformer and dc motor is The transformer has a core The transformer has two windings The transformer is a static device The transformer has a magnetic circuitarrow_forward
- A 200 V/100 V, 50 Hz transformer is to be excited at 40 Hz from 100 V side. For the exciting current to be constant, the applied voltage should be ?arrow_forwardWhat is the transformer's ratioarrow_forwardWith the aid of simple sketches explain briefly the meaning of transformer polarity and terminal markingarrow_forward
- Question 9 If the turn ratio of a step-up transformer is 1:15 and the full-load secondary current is 300 A, the primary current would be: O A. 20 A O B. 450 A O C.4.5 kA O D. 45 kA O E. None of the other choices are correctarrow_forwardName the test that you could perform on the transformer to calculate the copper winding loss Elaborate on this test to explain how you could find the copper lossarrow_forward2. When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is 1. d States) D, Focusarrow_forward
- How many primary volts must be applied to a transformer with a turns ratio of 0.5 to obtain a secondary voltage of 15 V? Explain turns ratio in case of transformer?arrow_forwardWhether a transformer shifts an ac waveform by 0° or 180° depends on the phasing of the waveform applied to the primary winding the amount of loading on the secondary winding the direction of turns of wire on the primary and secondary windings the type of core material that is used in the construction of the transformerarrow_forwardWhat are the different losses across the transformer? Which losses are variable? What turns ratio isrequired on the secondary of a transformer if the primary has 400 turns? The applied voltage is 220VAC and the secondary voltage is 11 V.arrow_forward
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