Electronics Engineering

Yes, a switch is needed to control the flow of electricity in a circuit. It allows you to open or close the circuit, which determines whether the electrical current can flow through it or not. Without a switch, the circuit would be always on and the device connected to it would not be able to be turned off.

The unit of Lorentz number is watts per kelvin squared (W/K^2). It is a physical constant that relates the thermal and electrical conductivities of a material at a specific temperature.

In a capacitor, the current LEADS the voltage by 90 degrees, or to put it the other way, the voltage LAGS the current by 90 degrees.

This is because the current in a capacitor depends on the RATE OF CHANGE in voltage across it, and the greatest rate of change is when the voltage is passing through zero (the sine-wave is at its steepest). So current will peak when the voltage is zero, and will be zero when the rate of change of voltage is zero - at the peak of the voltage waveform, when the waveform has stopped rising, and is about to start falling towards zero.

S waves do not pass through Earth's liquid outer core, which causes a shadow zone on the opposite side of the Earth from an earthquake. The liquid outer core absorbs and blocks S waves, preventing them from reaching the surface beyond the shadow zone.

Materials that are not good conductors of electricity include rubber, glass, and plastic. These materials typically have high electrical resistance and do not allow the flow of electric current easily.

because people don't like to wear gloves.

and bandaids couldn't be manufactured in enough quantity

Actually, some do. Electric knives not only have pointed ends, but sharp blades, as well. And irons have sort of point in the front, but not pointed enough to be sharp.

I stand corrected perhaps that's why i learned electronics so much easier than

easier than mechanics..

it only took about 4-5 tries to learn which end of the soldering iron to hold.

where screwdrivers and wrenches ill probably never know

those ratcheting box wrenches sometimes don't have the little lever and i still gotta take em of and turn em over about half the time

Yes, a rheostat can be used with both AC and DC currents. The rheostat's variable resistor can be adjusted to control the current flowing through a circuit, regardless of whether it is AC or DC.

A: Nobody should give you an answer for the simple fact there is no mention of current requirement. Let me try this minimum need is a reverse breakdown voltage of 648.60 volts. for 1 amp try 1n4007.

No, it is not recommended to use an AC fuse for DC applications. AC fuses are designed to handle the characteristics of an alternating current flow, whereas DC fuses are designed specifically to handle the unique challenges posed by direct current. Using an AC fuse for DC applications can lead to safety hazards and may not provide the necessary protection for the circuit.

1. Chopper converters: These regulate the average voltage by switching the input supply on and off at a high frequency.
2. Buck-boost converters: These can step up or step down the voltage to regulate the speed of the DC motor.
3. Dual converter: This type can provide bidirectional power flow, allowing for both motoring and regenerative braking in DC drives.

A: For a digital meter to test a diode it must have a scale for resistance for it to work, If not a 1.25 v cell with series limiting resistor will work. If you measure across the diode the reading should be .7 volts reverse the cell polarity then the diode voltage should be 1.25 v .7v is forward voltage 1.25 is reverse voltage.

The MKS (meter-kilogram-second) system is a variant of the metric system that uses the meter for length, kilogram for mass, and second for time. The SI (International System of Units) system builds on the MKS system but includes additional base units, such as the kelvin for temperature and the candela for luminous intensity. As a result, the SI system is more comprehensive and widely used in scientific and engineering fields.

A: Pacemaker battery is designed to last years. It only does any work when it is necessary. Your doctor is the best way to analyze the validity of the battery and it is safer that way. I read in a medical journal that most pacemakers last longer then the host. Do not worry about but do see your doctor to make sure.

To change from 120 V AC to 24 V AC, just connect it up to an appropriate transformer. To convert 120 V AC to 24 V DC, you'd need a transformer followed by a full-wave rectifier and filter capacitors.

It makes no difference whether the circuit is parallel, series or complex. The number of electrons travelling (or oscillating back and forth for AC) is determined by the current (amps). 1 amp = 1 coulomb/second. 1 coulomb = the charge represented by 6.24150962915265 x 1018 electrons.

The current in each leg of a parallel circuit has to be worked out separately.

It works on the following principles : (i)thermionic emission (ii)deflection of the electron beam by the electric and magnetic field (iii)fluorescence produced by the electron beam on a fluorescent screen

no. applying an electrical current to a coil wrapped around a magnet would create a force, which would move the magnet one way or another. to fully understand how to position coils and magnets to get the result you want, google the 'right hand thumb rule'

Charging a 1.5 volt battery with a 5 volt power supply is not recommended as it can potentially damage the battery due to overcharging. It is safer to use a proper battery charger designed for the specific type and voltage of the battery.

when you are floating and then you start moving and then you fall beneth water when you are floating and then you start moving and then you fall beneth water

Disadvantages of armature speed control for a DC motor include complexity of control circuitry, increased maintenance due to wear on the brushes and commutator, and limited speed range compared to field control methods. Additionally, armature control can result in lower efficiency and poor performance at low speeds.

An ammeter is placed in series with a circuit in order to measure the current. If it has any appreciable resistance, inserting the ammeter will increase the normal resistance of the circuit and reduce the value of the current flowing through it. The ammeter will, therefore, give an inaccurate reading (under-read). So the ammeter must have a very low resistance so that it has the minimum effect on the normal resistance of the circuit being tested. Ideally, the ammeter should have zero resistance but, of course, this is impossible.

The relative permittivity of indium arsenide (InAs) is typically around 15-17 at room temperature. This value can vary slightly depending on factors such as temperature and frequency of the electric field.

Ripple voltage, in the presence of a filter capacitor, is inversely proportional to load resistance.

If the load were zero (resistance infinite), then there would be no ripple voltage. As the load increases (resistance decreases), the ripple voltage increases.

The ripple waveform will appear to be sawtooth, with the rising edge following the input AC from the diode's conductioin cycle, and with the falling edge either being linear or logarithmic, depending on load. If the load is resistive, without a regulator, the falling edge will be logarithmic. If the load is constant current, such as with a regulator, the falling edge will be linear.

You cannot convert watts to amps, since watts are power and amps are coulombs per second (like converting gallons to miles). HOWEVER, if you have at least least two of the following three: amps, volts and watts then the missing one can be calculated. Since watts are amps multiplied by volts, there is a simple relationship between them.

J.J. Thomson is credited with identifying cathode rays as streams of negatively charged subatomic particles, which were later named electrons. His experiments with cathode ray tubes led to the discovery of the electron and contributed to the development of the atomic theory.