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NTC = negative temperature coefficient
NTC thermistors are resistors with a negative temperature coefficient, which means that the resistance decreases with increasing temperature. They are primarily used as resistive temperature sensors and current-limiting devices.

Battery capacity” is a measure (typically in Amp-hr) of the charge stored by the battery, and is determined by the mass of active material contained in the battery. The battery capacity represents the maximum amount of energy that can be extracted from the battery under certain specified conditions.
Here capacity = 100 Ah so it will last for a 10 hours for a discharge of 10 A per hour.

A common type of short circuit occurs when the positive and negative terminals of a battery are connected with a low-resistance conductor, like a wire. With a low resistance in the connection, a high current will flow, causing the delivery of a large amount of energy in a short period of time. This will lead to burn out of the fluorescent tube.

The single-phase induction motors are not self-starting because the produced stator flux is alternating in nature and at the starting, the two components of this flux cancel each other, and hence there is no net torque.

If the capacitor under test is short, the multimeter needle will go to zero and remain there.
If the capacitor under test is open, the multimeter needle will not move (will remain at the infinity position which is the initial position for analogue multi meters).
If the capacitor under test has leakage then the needle will first deflect to zero, and then slowly move towards infinity and will settle at a point before infinity.

Local Action. This is the tendency for the chemically active components of a cell to react with each other, and so become exhausted even when no current is being drawn from the cell.The zinc becomes coated with hydrogen bubbles, as a result of its reacting with the acid, even when no current is being drawn. After a while either the zinc will be entirely consumed, or the acid will be neutralised, all to no useful effect.

The electrochemical equivalent, sometimes abbreviated Eq or Z, of a chemical element is the mass of that element (in grams) transported by 1 coulomb of electric charge. The electrochemical equivalent of an element is measured with a voltameter.

Trickle charging means charging a fully charged battery at a rate equal to its self-discharge rate.
Thus enabling the battery to remain at its fully charged level.
This state occurs almost exclusively when the battery is not loaded, as trickle charging will not keep a battery charged if current is being drawn by a load.

Bismuth is a chemical element with the symbol Bi and atomic number 83.
It is a pentavalent post-transition metal and one of the pnictogens with chemical properties resembling its lighter homologs arsenic and antimony.
Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores.
The free element is 86% as dense as lead. It is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge.
Bismuth is the most naturally diamagnetic element, and has one of the lowest values of thermal conductivity among metals.

Magnetic flux density is defined as the amount of magnetic flux in an area taken perpendicular to the magnetic flux’s direction. An example of magnetic flux density is a measurement taken in teslas.

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