Circuits

An ammeter is the instrument used to measure current in an electric circuit. It is connected in series in the circuit and provides a reading of the amount of electric current flowing through it.

A dry cell battery uses two electrodes made of dissimilar metals inserted in a paste like electrolyte. The container of a dry cell battery is made of zinc which is the negative electrode. The carbon rod in the middle of the dry cell battery is the positive electrode. The space between the electrodes is filled with an electrolyte usually manganese dioxide paste. the paste causes a chemical reaction between the carbon rod and the zinc case.

If your home were wired in series, then . . .

-- Everything in the house would need to be turned on all the time.

-- If anything in the house got unplugged or turned off, then

everything else in the house would go dead.

-- Whenever something got turned off or unplugged or burned out,

there would be no way to tell which thing it was. You would just

have to go around the house (in the dark) trying them all, until you

got lucky.

-- The devices that need the most power ... like the air conditioner or

the electric stove ... would get the least power, and would not work.

-- The devices that need the least power ... like the clock radio or the

night-light ... would get the most power, and would burn out.

-- If you ever changed a light bulb and put in a different size from the one

that was there before, the brightness of every other light in the house

would change.

This is why most people choose parallel circuits for their homes.

In the experiment of flashing and quenching of a capacitor, the neon bulb twinkles because the charging and discharging of the capacitor cause the voltage across the capacitor to fluctuate rapidly. These fluctuations can cause the neon bulb to turn on and off, leading to the twinkling effect.

For a circuit to light a bulb, there must be a closed loop for the flow of electricity. This loop typically consists of a power source (e.g. battery), wires, a switch, and the bulb. When the switch is closed, the circuit is complete and electricity can flow through the wires to the bulb, causing it to light up.

Electric current is constituted by the movement of electrically charged particles, typically electrons, through a conductive material. The flow of electrons within a circuit is what creates an electric current that can power devices and perform work.

That's entirely possible if, for example, a small DC-conductive path were to form

through a puncture in the dielectric.

When a formerly-working capacitor begins to not work, it is said to have "failed",

"bought the farm", "bit the dust", "gone south", or "broke".

A circuit may stop working due to issues such as a blown fuse, a loose connection, a broken component, or incorrect wiring. Other factors like a short circuit, low battery power, or overheating can also cause a circuit to fail. Proper troubleshooting and testing is necessary to identify and rectify the specific problem.

The temperature sensitive resistor commonly used on vacuum gauges is called a thermistor. It is a type of resistor whose resistance changes significantly with temperature, making it useful for measuring variations in temperature within a system.

A short circuit occurs when a conductor of low resistance connects across the conductors in a circuit. This creates a path of minimal resistance, bypassing the intended load, which can lead to excessive current flow and damage to the circuit components. It is important to identify and rectify short circuits to ensure the safe operation of the circuit.

In a Transformer, Core flux is the difference of primary flux and Secondary flux which are opposite to each other in direction. There difference is equal to the no load flux at all loads.

So, some of primary flux passes through the core and remaining becomes leakage flux (Because Secondary flux forces it to get out of the core). Same is the case with Secondary flux.

Now, flux is directly proportional to Voltage and Current.

When Current increases due to increased load (and voltage remains same):

Then both primary and secondary flux increase. Because both of them increase, so there difference remains same. And all remaining flux is forced out. Hence leakage flux increases with current, but Core flux remains constant.

When Primary Voltage is increased:

Then only primary flux increases. So difference of this new increased primary flux and previous same secondary flux increases. Hence Core flux increases with voltage, But leakage flux does not.

That's how In transformer core flux depends on voltage whereas leakage flux depends on current.

In a series circuit, the current (amps) is constant throughout the circuit. This means that the same amount of current flows through each component connected in series. The current is not divided or reduced as it travels through the circuit.

In an L-C-R AC series circuit, resonance occurs when the capacitive and inductive reactances cancel each other out, resulting in minimum impedance. This causes the current in the circuit to be at its maximum and the power factor to be unity. By measuring the frequency at which resonance occurs, one can determine the values of the inductor, capacitor, and resistor in the circuit.

A light bulb in a circuit provides resistance to the flow of electricity, causing it to heat up and emit light. This allows the circuit to be completed and for electrical energy to be converted into light energy.

Yes, a capacitor consists of two conductive plates separated by an insulating material, also known as a dielectric. When a voltage is applied across the plates, it creates an electric field in the dielectric, storing electrical energy in the form of electrostatic potential energy.

When a neuron is activated, there is a change in the voltage across the cell membrane at the receptor site. This change is known as a postsynaptic potential and can be either depolarizing (making the neuron more likely to fire an action potential) or hyperpolarizing (making the neuron less likely to fire an action potential).

To test a vacuum capacitor, you can use a multimeter to measure its capacitance and check for any signs of physical damage or leaks. You can also test for the continuity of the internal connections using an ohmmeter. Additionally, you can test the vacuum level within the capacitor by using specialized equipment designed for this purpose.

The easiest way to measure ohms is with an ohm meter, which is typically part of an electrical multi-meter. A multi-meter can read many different kinds of electrical variables: AC voltage, DC voltage, amps, and ohms among them.

A switch uses an insulator called an "air gap" to cut off the current flow in a circuit. When the switch is turned off, it creates a physical break in the circuit, preventing electricity from passing through.

It is nothing but giving current in opposite direction (positive to negative andnegative to positive)

Having a voltage difference across your body is important for normal physiological functions and nerve signaling. This difference allows for the transmission of electrical impulses in the body, enabling processes like muscle contraction and communication between cells. A balanced voltage difference is necessary for healthy functioning of the nervous system and overall well-being.

If voltage is increased, capacitance remains constant. Capacitance is determined by the physical properties of the capacitor, such as plate area, distance between plates, and permittivity of the material, and is not affected by changes in voltage applied across the capacitor.