## It is needed

- – ammeter;
- – ohmmeter;
- – watt meter;
- – calculator;
- – technical documentation.

## instructions:

### Step 1

To convert amps to volts:

- Check the device’s power rating or the conductor’s resistance. Find the devices’ power in the technical documentation or the device housing.
- If the documents for the device are unavailable, search for the technical parameters (power) on the Internet or measure it with a wattmeter.
- Use an ohmmeter to determine the resistance of the conductor.

### Step 2

If the device’s power is known, use the following formula to convert amps to volts: U = P / I, where: U – voltage, in volts, P – power, in watts, I – current, in amps. The energy consumed by the electrical appliance.

### Step 3

**Example:** An electric motor is known to deliver 1,900 watts. The return is 50%. At the same time, I found a 10-amp fuse in the motor. Question: What voltage is the electric motor designed for? Solution. To calculate the power consumption of an electrical appliance, divide the effective power by the efficiency: 1900/0.5 = 3800 (watts). To calculate voltage, divide the power. for current: 3800/10 = 380 (volts). Answer: A voltage of 380 volts is required for the electric motor to work.

### Step 4

If you know the electrical resistance of a conductor or a simple heating device (such as iron), use Ohm’s law to convert amperes to volts: U = IR, where R is the conductor’s resistance in ohms.

### Step 5

**Example:** The coil resistance of an electric stove is 110 ohms. A current of 2 amps runs through the stove. Question: What is the voltage in the mains? Solution. U = 2 * 110 = 220 (volts). Answers. The voltage in the mains is 220 volts.

### Step 6

**Example:** The coil resistance of an incandescent lamp for a flashlight is 90 ohms. When it is on, a current of 0.05 amps passes through it. Q: How many standard batteries are needed to run the flashlight? Solution: U = 0.05 * 90 = 4.5 (volts). The EMF of one battery is 1.5 volts. Therefore a flashlight needs 4.5/1.5 = 3 such elements.