An electrical device contains a transformer. Its primary coil has 200 turns, and its secondary coil has 20 turns. If the device is plugged into a 120-volt line, what is the output voltage of the device?
well, since the voltage ratio is the same as the ratio of turns, you would have
120 * 20/200
Stupid question
To determine the output voltage of the device, we need to use the turns ratio of the transformer. The turns ratio is the ratio of the number of turns in the secondary coil to the number of turns in the primary coil.
In this case, the turns ratio can be calculated as follows:
Turns ratio = Number of turns in the secondary coil / Number of turns in the primary coil
Turns ratio = 20 turns / 200 turns
Turns ratio = 1/10
The turns ratio tells us that the secondary coil has one-tenth the number of turns as the primary coil.
Now, we can calculate the output voltage by multiplying the turns ratio by the input voltage:
Output voltage = Turns ratio x Input voltage
Output voltage = (1/10) x 120 volts
Output voltage = 12 volts
Therefore, the output voltage of the device is 12 volts.
To determine the output voltage of the device, we can use the transformer turns ratio formula:
Turns ratio = Np / Ns
Where:
Np = number of turns in the primary coil
Ns = number of turns in the secondary coil
In this case, the primary coil has 200 turns (Np = 200) and the secondary coil has 20 turns (Ns = 20).
Plugging these values into the formula, we get:
Turns ratio = 200 / 20 = 10
The turns ratio of 10 means that for every 10 turns in the primary coil, there is 1 turn in the secondary coil.
Now, we can determine the output voltage of the device using the turns ratio:
Output voltage = Input voltage / Turns ratio
In this case, the input voltage is 120 volts.
Plugging these values into the formula, we get:
Output voltage = 120 volts / 10 = 12 volts
Therefore, the output voltage of the device is 12 volts.