Explanation:
Electricity can produce light, heat, and magnetism. When electricity flows through a conductor, it can generate light in a bulb, heat in a resistor, and magnetism around a wire.
Explanation:
Silicon is a widely used semiconductor material in electronic devices due to its unique properties in controlling the flow of electric current.
Explanation:
A material that readily releases electrons is known as a conductor. Conductors allow the flow of electric current due to the ease with which electrons can move through them.
Explanation:
According to the law of electrostatics, like charges repel each other.
Explanation:
Current flow refers to the movement of electric charge carriers, typically electrons, through a conductor.
Explanation:
An ohmmeter measures resistance and requires an internal power source (usually a battery) to check a load or circuit. It sends a small current through the circuit under test and measures the voltage drop to determine resistance.
Explanation:
When wired in series, the total resistance in the circuit would be 20 ohms (contactor coil) + 200 ohms (control relay) = 220 ohms. Since the voltage is fixed at 24 volts, and using Ohm's Law (V = IR), the current in the circuit would be V/R = 24V / 220Ω ≈ 0.109A. The control relay, with its higher resistance, would have a higher voltage drop across it, resulting in it operating. However, the voltage drop across the contactor coil may not be sufficient to activate it, so only the control relay would operate.
Explanation:
The safety ground conductor is typically colored green. This standard color helps to easily identify and distinguish the ground conductor in electrical wiring systems.
Explanation:
Impedance refers to the total opposition to the flow of alternating current in a circuit, including both resistance and reactance.
Explanation:
When testing a capacitor with an ohmmeter, it should initially show low resistance (near zero) as the capacitor charges. Then, it should gradually return to a high reading as the capacitor becomes fully charged, indicating that the capacitor is functioning correctly.
Explanation:
Using Ohm's Law (V = IR), rearranged to solve for resistance (R = V/I), we find that the resistance required is R = 120V / 2A = 60 ohms.
