8. How many secondary loops do you need in a step down transformer if we start...
A step-up transformer has a primary coil with 145 loops and a secondary coil with 1,595 loops. If the primary coil is supplied with a household current of 120 V and 12 A, (a) what voltage is produced in the secondary circuit? V (b) What current flows in the secondary circuit? A
The step-down transformer in a local neighborhood reduces the voltage from a 1,680 V line to 120 V. (a) If there are 175 loops on the secondary, how many are on the primary coil? ______ loops (b) What current does the transformer draw from the line if the current in the secondary is 36.0 A? ________ A (c) What are the power input and output? Input: _______ W Output: ________ W
The primary 40-turn coil of an ideal transformer is supplied with 120 V (rms). If the rms voltage output of the secondary coil is 15 V, how many turns are in the secondary coil, and what type of transformer is this? 8 turns, step-down transformer 5 turns, step-down transformer 15 turns, step-down transformer 320 turns, step-up transformer 160 turns, step-up transformer
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?
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 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.
70. A transformer with a turns ratio (secondary/primary) of 1:18 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. What is the voltage supplied to the recharger?
9. To step 120 V down to 30 V, what must the turns ratio be? 11. 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?
A step-down transformer produces a voltage of 6.1 V across the secondary coil when the voltage across the primary coil is 130 V . What voltage appears across the primary coil of this transformer if 130 V is applied to the secondary coil?
A step-down transformer produces a voltage of 5.4 V across the secondary coil when the voltage across the primary coil is 140 V. What voltage appears across the primary coil of this transformer if 140 V is applied to the secondary coil?