Consider a transformer with 125 turns of wire in the primary winding and 1475 turns of wire in the secondary winding. The secondary winding is connected across a 1540-Ω resistor. The primary winding is connected to an AC generator which produces 10.5 volts (rms).
(a) Find the voltage (rms) across the secondary winding.
(b) Find the current (rms) through the resistor.
(c) Find the current (rms) through the primary winding.
Consider a transformer with 125 turns of wire in the primary winding and 1475 turns of...
An ideal transformer with 5 turns on the primary and 10 turns on the secondary is shown in the figure. A sinusoidal voltage source having V(t) = 10 sin(100t) volts is connected across the primary and a 1 Ω resistor is connected across the secondary. What is the maximum value of the current in the primary circuit (not the secondary)? (answer is 40 amps)
A transformer 840 turns of wire in its primary and 660 turns of wire in its secondary. A voltage Vrms = 120 volts is applied to the primary. A current Irms = 0.16 A flows into the primary. A light bulb -- acting like an ideal resistor -- is attached to the secondary. What is the resistance of the light bulb ? a. 1200 Ω b. 460 Ω c. 260 Ω d. 90 Ω e. 950 Ω
If a lossless transformer has 1000 turns for a primary winding and 100 turns for the secondary winding, and the voltage at the secondary terminal is 10 volts, what is the voltage at the primary terminal?
An ideal transformer has a primary winding with 100 turns and a secondary winding with 20 turns. If the primary winding has a voltage drop of 10 V AC, what is the EMF in the secondary coil? A. 100 V AC B. 10 V AC C. 2 V AC D. 20 V AC
Accuracy is important. Do not round intermediates and check the
answer range to make sure you are correct.
Values:
[01] 2.08 [02]
68.47 [03] 0.239 [04] 1173.7 [05] 1403. [06] 53.8
THE CORRECT ANSWERS WILL BE IN THE FOLLOWING RANGES:
8-1a. 140, 220 Hz
8-1b. 40:0, 62:0 mA
8-2a. 70:0, 99:0 V
8-2b. 140:0, 160:0 V
8-2c. 60:0, 99:0 V
8-2d. 60:0, 90:0 V
8-3a. 40:0; 99:0 pF
8-3b. 100; 400 mV
8-3c. 1:00; 3:00 mV
8-4a. 100; 150 V...
A single phase transformer has 2000 turns on the primary winding and 500 turns on the secondary. Winding resistances are ?1 = 2Ω, ?1 = 8Ω, ?2 = 0.125Ω, ?2 = 0.5Ω, ?? = 1122?? 800Ω and ???? = 1000Ω. a. Draw the complete circuit for the transformer with the parameters and transformation ratio indicated. b. Refer the secondary parameters to the primary side and draw the equivalent circuit (Draw the circuit with the core in parallel with the voltage...
1. If 480 volts is applied to the primary winding of a transformer which has 300 turns in the primary winding and 15 turns in the secondary winding, the secondary voltage will be A. 0.0417 volts. C. 56.8 volts B. 24 volts. D. 9600 volts. 2. A distribution transformer with a grain-orientented steel core is highly efficent because its A. exciting current is sufficiently high. B. flux direction is parallel to the stell-rolling direction C. permeability is increased due to...
A step-down transformer has 83 turns in its primary coil and 24 turns in its secondary coil. The primary coil is connected to standard household voltage (rms = 120.0 V, 60.0 Hz). Suppose the secondary coil is connected to a 12.0-Ω resistor. (a) What is the maximum current in the resistor? (b) What is the average power dissipated by the resistor?
An ideal transformer has 4500. turns in its primary (input) and 14500. turns in its secondary (output). 10.0-V ac is connected to the primary (input). a) What is the voltage on the secondary (output)? b) What is the secondary (output) current if an 8.00-Ω resistor is connected to the secondary (output)? c) What is the power supplied to the primary (input)?
An ideal transformer has 4500. turns in its primary (input) and 14500. turns in its secondary (output). 10.0-V ac is connected to the primary (input). a) What is the voltage on the secondary (output)? b) What is the secondary (output) current if an 8.00-Ω resistor is connected to the secondary (output)? c) What is the power supplied to the primary (input)?