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Why shunt resistance used in ammeter and why is it connected in parallel?
An ammeter's coil requires very little current for full-scale deflection (fsd). So, to measure a current above its fsd value, most of that current must be allowed to bypass the coil. This is achieved by placing a very low value shunt resistance in parallel with the coil ('shunt' is an archaic word for 'parallel').
What is the equivalent resistance for two 30 ohm resistors wired in parallel?
ANSWERResistances in parallel reduce the total resistance to less than either, using the formula R = 1 / (1/R1 + 1/R2). Thus, R = 1 / (1/30 + 1/30 ), so R = 1 / ( 1/15 ), so R = 15.One way to remember how this works is that the two resistors provide two paths for electricity to flow, so the resistance will be less.Note: Inductances act the same way in parallel. Capacitors simply add in parallel. It is easy to remember these because an inductor is a coil, and placing them in series is like making a longer coil, which is how you increase the inductance of a coil. Capacitors can be made from two plates, and the capacitance increases with area, so placing two of them in parallel is equivalent to increasing the area of one.
Why does the emitter bypass capacitor increase the voltage gain?
In the common emitter configuration, gain is hFe or collector resistance divided by emitter resistance, whichever is less. Placing a capacitor across the emitter resistor effectively makes the emitter resistor less, for higher frequencies, so the gain is higher for higher frequencies. This creates a high pass filter, or a low cut filter, depending on what you want to call it.
How does the technique for measuring current with DMM differ from measuring voltage?
Well, measuring current with a Digital Multimeter (DMM) requires breaking the circuit and inserting the meter in series to measure the flow of electrons. On the other hand, measuring voltage involves placing the DMM in parallel across the component to measure the potential difference. Both techniques are important for understanding and troubleshooting electrical circuits, and with practice, you'll become more comfortable and confident using your DMM.
What is the term used to describe the placing of two or more signals on a single circuit?
Multiplexing.
How do you charge a capacitor?
You charge a capacitor by placing DC voltage across its terminal leads. Make sure when using a polarized capacitor to place positive voltage across the positive lead (the longer lead) and negative voltage across the negative lead. Also make sure that the voltage you charge the capacitor to doesn't exceeds its voltage rating.
How does placing batteries in parallel boost the total voltage?
Placing batteries in parallel increases the total voltage because the positive terminals are connected together and the negative terminals are connected together, which allows the voltage of each battery to add up.
What is different of common emitter amplified with capacitor and without capacitor?
It depends on where the capacitor is located. If it is across the emitter resistor, then the gain of the CE amplifier will be higher at higher frequencies.Remember that gain in the CE amplifier is collector resistance divided by emitter resistance, or hFe, whichever is lower. Placing a capacitor across the emitter resistor will serve to make the effective resistance smaller at higher frequencies, resulting in increased gain, up to the limit of hFe.If this is not the intended location of the capacitor, then please restate the question and provide the capacitor location.
Why C-C configuration is used for impedance matching?
The C-C (capacitor-capacitor) configuration is used for impedance matching because it allows for the tuning of reactive elements to achieve a desired impedance at specific frequencies. By placing capacitors in series or parallel, the overall impedance can be adjusted to minimize reflections and maximize power transfer between components in RF and audio applications. This configuration is particularly effective in circuits where inductive loads are present, as it can help compensate for inductance with capacitive reactance.
What type of curcuit measurement is made by placing a meters test leads in parallel with a deenergized component?
Continuity, resistance?
How do you crush a ceramic capacitor for FTIR analysis?
Crushing a ceramic capacitor for FTIR analysis can be done by placing the capacitor in a mortar and pestle and grinding it into a fine powder. Ensure that the ceramic material is completely broken down to achieve a homogeneous sample for FTIR analysis. Wear appropriate protective gear to prevent inhalation of particles during the crushing process.
Describe the operation of a voltage-variable capacitor?
A voltage variable capacitor (VVC) is made by placing an intercalation compound between two electrodes of a capacitor. The VVC has a reservoir of an intercalant in proximity with the intercalation compound. The two materials are chosen from those known to exhibit the intercalation reaction. The extent of the intercalation reaction is controlled by applying a voltage to the intercalant reservoir and the intercalation compound. A variable capacitor is created by applying a signal to the device and appropriately controlling the ε of the device by using the input control voltages.
Will putting another resistorin parallel raise or lower the total resistors in circuit?
Placing another resistor in parallel to an existing resistor will lower the total resistance in the circuit. RParallel = 1 / Summationi=1toN (1 / Ri)
What are the advantages to placing lights and motors in parallel?
Placing lights and motors in parallel allows each to operate independently without affecting the other's performance. This configuration also ensures that each device receives the full voltage supply, maximizing their efficiency. Additionally, if one device fails, the others can continue to function without interruption.
Is a switch in series with what it controls or in parallel?
An AC wall switch is in series within the parallel circuit of the overall house wiring.
How do you turn on redstone lamps in minecraft?
They need to be supplied with a charge. You can light them by placing a redstone torch on an adjacent block, or you could link them with redstone dust to a lever, the level will provide a charge when 'on' and light the lamp.
How can the itching from bug bites be treated on children?
Bug bites can be treated on children in a number of different ways: Washing the affected area with soap and water. Placing a cold compress such as a towel cooled with water to the affected area, to reduce the swelling. Not to scratch the affected area as it can become infected. Take painkillers Put an ice pack on the affected area.
