A step-down transformer has 525 turns in its secondary and 12 500 turns in its primary....
A transformer has 1020 turns in the primary and 12 turns in the secondary. (a) Is this a step-up or step-down transformer? (b) If the primary is connected across 120 V rms, what is the open-circuit voltage across the secondary? ( ) V (c) If the primary current is 0.3 A, what is the secondary current, assuming negligible magnetization current and no power loss? ( ) A
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 step-down transformer has a primary coil of 350 turns and a secondary coil of 10 turns. Its primary coil is plugged into an outlet with 220 V (AC). If the current in the secondary coil is 14.35 A, what current does the primary coil draw?
An ideal step-down transformer has a primary coil of 370 turns and a secondary coil of 22 turns. Its primary coil is plugged into an outlet with 115 V, from which it draws a current of 0.29 A. (a) What is the voltage in the secondary coil? (b) Calculate the current in the secondary coil? (c) Assuming that the transformer secondary is driving a resistive load, calculate the average power dissipated in the resistor.
A step-down transformer with 500 primary turns and 15 secondary turns is used for a rechargeable device. The input voltage is 110V, while the output current is 0.25A. a. What is the voltage output, the current input, and the power (input or output)?
An ideal step-down transformer has a primary coil of 400 turns and a secondary coil of 25 turns. Its primary coil is plugged into an outlet with 110 V(AC), from which it draws an rms current of 0.83 A. 1.)What is the voltage in the secondary coil? 2.)Calculate the rms current in the secondary coil. 3.)Assuming that the transformer secondary is driving a resistive load, calculate the average power dissipated in the resistor.
Part A: A transformer with turns ratio (primary/secondary) of 18:1 is used to step down the voltage from a 120 V wall socket to be used in a battery charger. What is the voltage supplied to the recharger? Part B: The electric motor in a toy train requires a voltage of 9.0 V. Find the ratio of turns on the primary coil to the turns on the secondary coil in a transformer that will step the 120-V household voltage down...
An alternating EMF of 110 Vis applied to a step down transformer having 150 turns on its primary and 25 turns on its secondary. The secondary current is 200 mA. What is the secondary EMF? 18 V 660 V 33 V 1200 V 1320 V
An ideal transformer with 300 turns in its primary and 500 turns in its secondary has a peak primary voltage of 12 volts. Its peak secondary voltage is a. 10 b. 20 c. 30 A transformer's primary and secondary coils are connected so that the current can flow directly from one to the other. a. true b. false
A transformer has 500 turns in the primary and 50 turns in the secondary. If the input voltage is 120V, what is the output voltage? Answer: V If the transformer has an efficiency of 92%, what is the output current if the input current at 120V is 0.50A? Answer: А