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Why do the reading differ for increasing and decreasing values of the lamp voltages?
at the time of decreasing lamp voltage as the temperature is already high the gas in the lamp is already in ionized state leading to different resistance ,but when increasing voltage the gas is not in ionized state it ready to ionize ,so there is slightly variation in resistance . :)
Is a device that changes the voltage of an alternating current with little loss of energy?
The device you are referring to is called a transformer. Not only can a transformer increase voltage, it can decrease voltage as well. These are known as a step up transformer for increasing voltages and step down for decreasing voltages.
What is nonlinear resistance?
A nonlinear resistance is a resistance which is different for different voltages ie current is not proportional to voltage. An example of this is the filament of an incandescent lamp.
What are the two voltage readings on the power supply?
The two voltage readings on a power supply typically refer to the output voltages it provides, which are often 5V and 12V for standard ATX power supplies used in computers. The 5V output is commonly used for peripherals and logic circuits, while the 12V output powers components like the CPU and graphics card. Some power supplies may also feature additional voltages, such as 3.3V, depending on the application.
What are the voltages in secondary transmission electric lines?
A: Those voltages are called distribution voltages to differentiate from transmission voltages. And that varies from state to state and locals . Usually around 10kv to 20 kv
If the excitation of generator changes what happens to the terminal voltage?
By Decreasing the excitation voltage the terminal voltage will decrease and similarly by increasing the excitation voltages the terminal voltage will also increases.
Are the terms voltage limiter and voltage regulator interchangeable?
No. A voltage regulator usually can provide control in both directions (increasing or decreasing voltages). A voltage limiter clamps the voltage to below a specific level.
Why do the reading differ for increasing and decreasing values of the lamp voltages?
at the time of decreasing lamp voltage as the temperature is already high the gas in the lamp is already in ionized state leading to different resistance ,but when increasing voltage the gas is not in ionized state it ready to ionize ,so there is slightly variation in resistance . :)
Is a device that changes the voltage of an alternating current with little loss of energy?
The device you are referring to is called a transformer. Not only can a transformer increase voltage, it can decrease voltage as well. These are known as a step up transformer for increasing voltages and step down for decreasing voltages.
What are the factors that influence the speed of the direct-current shunt motor with increasing load?
.The magnitude of the voltage and current of both the armature and shunt field coil. To decrease the speed when the load is increasing then increase the shunt field current while decreasing the armature voltage or current. To increase the speed while the load is increasing then increase the armature current while decreasing the shunt field current. The decreasing and increasing of these currents and voltages can be done by connecting a variable resistor in series or parallel with each of the armature and/or shunt field coil.
What is nonlinear resistance?
A nonlinear resistance is a resistance which is different for different voltages ie current is not proportional to voltage. An example of this is the filament of an incandescent lamp.
What is the maximum voltage of incandescent light bulbs?
The maximum voltage of incandescent light bulbs is up to about three hundred volts. They can also go down as low as 1.5 volts. Incandescent light bulbs are the least efficient lighting system. More modern methods like flourescent lightbulbs are far more efficient.
What is the significance of negative values of voltages and currents?
Direction only. If you reverse the connections to your voltmeter or ammeter you get the same size readings but the directions are indicated to be the opposite way around, by reversal of sign.
What are the two voltage readings on the power supply?
The two voltage readings on a power supply typically refer to the output voltages it provides, which are often 5V and 12V for standard ATX power supplies used in computers. The 5V output is commonly used for peripherals and logic circuits, while the 12V output powers components like the CPU and graphics card. Some power supplies may also feature additional voltages, such as 3.3V, depending on the application.
Can incandescent lamps be 277V?
High Intensity Discharge fixtures can use 277 input voltages. These types of fixtures have ballasts and different wattage lamps available. The fixtures are mostly used in industrial and commercial applications.
What are the voltages in secondary transmission electric lines?
A: Those voltages are called distribution voltages to differentiate from transmission voltages. And that varies from state to state and locals . Usually around 10kv to 20 kv
What is voltmeter multiplier?
A voltmeter multiplier is a resistive component used in voltmeter circuits to extend the range of voltage measurements. It operates by increasing the input resistance of the voltmeter, allowing it to measure higher voltages without drawing significant current from the circuit being tested. Typically, it consists of a series resistor connected to the voltmeter, which limits the current and protects the measuring device from high voltage. This design ensures accurate readings across a broader voltage range.
