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What three things do you need for an electrical current?
To have an electrical current, you need a source of voltage (e.g., battery), a complete circuit (including conductive material), and a load (device that uses the electricity).
What is a electrical device that uses electromagnetism to change voltage from one level to another?
transformer.
What type of device is uses to increase or decrease the voltage of an electric current?
The device is called a "variac' and it is a type of transformer. It has a variable voltage ouput.
What is AC motor and DC motor?
AC stands for alternating current, and DC is direct current. A motor is a device that uses electrical energy to spin. An AC motor uses AC voltage, and a DC motor uses DC voltage. http://ezinearticles.com/?The-Difference-Between-AC-and-DC-Electric-Motors&id=193767
What device uses magnets are moved through a coil of wire to generate electric current.?
Every 'electrical generator' does that.
What voltage does Brazil use for its electrical systems?
Brazil uses a voltage of 127 volts for its electrical systems.
What voltage does Iceland use for its electrical system?
Iceland uses a voltage of 230 volts for its electrical system.
What voltage does Israel use for its electrical system?
Israel uses a voltage of 230 volts for its electrical system.
How does an ohmmeter work to measure electrical resistance?
An ohmmeter works by sending a small amount of electrical current through the component being tested and measuring the voltage drop across it. The ohmmeter then uses Ohm's Law (VIR) to calculate the resistance of the component based on the current and voltage readings.
What are the is electrical relays and its principals and operation?
An electrical relay uses a low voltage, low current signal to control an electromagnet. When current passes through the electromagnet, it attracts the spring loaded arm with contactors, which will touch some stationary contactors, closing a circuit on a higher voltage/high current circuit. An example of this is when your thermostat 'tells' the air conditioner to turn on. The voltage & current from the thermostat are low, while the voltage & current necessary to run the air conditioner's compressor are high..
Is television an electrical or electronic device?
electrical and electronic is the same thing your TV uses electricity
What is a device that converts mechanical energy into electrical energy called?
A device that converts mechanical energy into electrical energy is called a generator. It uses the principle of electromagnetic induction to produce an electric current when a mechanical force, such as rotation, is applied to it.
