Why are wires joined together with solder?
Because solder will help prevent them from untwisting. More importantly, over time the outside surfaces of un- soldered wires may corrode or form some kind of non-conductive coating. Solder encases the joint, preventing corrosion or contamination; and thus maintains a zero-resistive connection.
What happens when current flow is interrupted by a blown fuse?
Blowing a fuse makes the circuit become “open” thereby stopping current flow.
When making permanent electronic connections use?
In making permanent electronic connections, use? Restricts a currents flow to a single direction.
What is a type of resistance in an AC transformer circuit?
In other words, in an AC circuit electrical resistance is called “Impedance”. In both cases this voltage -current ( V-I ) relationship is always linear in a pure resistance. So when using resistors in AC circuits the term Impedance, symbol Z is the generally used to mean its resistance.
Is it OK to solder electrical wires?
The reason is that solder is a very good electrical connection, but a very weak mechanical one. Copper (or aluminum) alone can bend, flex, and even stretch a bit without any damage, so it’s suitable for things that move around a bit. Solder is very brittle and will crack and break if you try to flex it.
Which one of the following devices protects a circuit?
Circuit breakers are devices that protect circuits from overload current conditions.
Which device restricts current flow?
A diode is a semiconductor device that essentially acts as a one-way switch for current. It allows current to flow easily in one direction, but severely restricts current from flowing in the opposite direction.
What is needed for electricity to flow?
To produce an electric current, three things are needed: a supply of electric charges (electrons) which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges. The flow of electricity can be likened to a flow of water through a pipe.
What uses a penny system to specify its size?
Nails that are larger than 20- penny are called spikes and are measured in inches. The penny system is used in the United States. Penny size indicates the nail’s length. The higher the penny size, the longer the nail.
What would you tell the person who is trying to loosen the rusty nut?
What would you tell the person who is trying to loosen the rusty nut with the wrench? Move your hand farther from the nut.
What kind of energy is converted to electrical energy by car battery?
The Chemistry of How A Car Battery Works The battery stores energy in a chemical form and converts the chemical energy into electrical energy. The reaction is offset by the external connection of the electrical cable that sends an electrical charge through the battery.
What’s the difference between impedance and resistance?
Impedance – The main difference between Resistance and Impedance is their behavior to AC and DC currents. While resistance controls the flow of AC and DC current, Impedance just determines the alternative current flow. It means that impedance is only used in AC systems and does not have any use in DC diagrams.
How do you calculate impedance?
Impedance (Z) conveys a component’s resistance to both direct current and alternating current; it is expressed as a complex number, i.e., Z = R + jX. The impedance of an ideal resistor is equal to its resistance; in this case, the real part of the impedance is the resistance, and the imaginary part is zero.
What is the resistance of a transformer?
A basic transformer has two windings that are wound around an electromagnetic core. When AC voltage is applied to one of the windings, it creates a magnetic field, which is amplified by the electromagnetic core. 4. Perform the resistance test.
|Terminal 1||Terminal 2||Result (Ohms)|