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What do you understand to be load?
Amove-able object
Describe how electrical devices use electrical energy?
in an AC appliance (something with a plug, connected to a socket, connected to the national grid) the electrical energy is transmitted from the power station to your house/home.take the example of a light bulb,SCIENCE EXPLANATION the electrons in the wire are free and can move about they circulate round the completed circuit carrying energy and offloading it to where there is an absence of it. The light bulb takes the energy from the electrons and releases the energy again as Thermal and Visual energy into the atmosphere and the electrons continue around the circuit where they can pick up energy again.SIMPLIFIED EXPLANATION when the switch is on the energy flows round and gives energy to the light bulb making it work.if you have a question of what i just said send me a message on my profilehope this answers your question
What is a braking resistor?
A braking resistor is used in motion systems where a motor in controlled by a drive. Typically, these are high-speed servomotors controlled by a servodrive. When accelerating, electrical energy is converted to a mechanical force to move a mass. When decelerating, that kinetic energy is converted (via the motor) back into electrical energy, and must go somewhere. To brake quick enough, the energy must be dumped into a power resistor, to be dissipated as heat. Read more at the link provided below.
How does a capacitor store energy?
The energy stored in a capacitor is almost entirely in the electric field produced between the plates. It takes energy from a battery or some other power source to move electrons to one of the plates and away from the other. This makes one plate positively charged and the other negatively charged. Electric field is produced in proportion to the charge per unit area on a plate, and this electric field is said to originate on positive charges and terminate on negative charges. Energy stored in electric fields is proportional to the square of the electric field strength and the volume of the field. The energy is transferred from the power source to the electric field through the rearrangement of electrical charges.
How do dams help produce hydroelectric energy?
Dams produce electrical energy by utilizing the energy in the water stored in an elevated lake. Outlets in the dam allow water to escape down a pipe, trading potential energy for kinetic energy, ie, as it falls it moves faster. At the bottom of the dam, the fast moving stream of water enters a turbine where the it hits the blades of the turbine and makes it spin rapidly. The spinning turbine is connected to a generator, a rotating machine with magnets that converts the energy of rotation into electrical energy, usually AC. The AC voltage is run into a transformer to convert it to high voltage (higher voltage is better for long distances) and sent on towers to where it is needed.
