Plasmodesmata

Gap Junctions

With desmosomes, cell membranes are connected by thread like substances that connect the cells across the space in between cells. Much like tight junctions, desmosomes physically hold the cells together, but do not allow fluids or materials to pass from the inside of one cell to the next.

If cells are joined together one after the other, they are said to be connected in series. Components are connected in series when they are joined end to end in a circuit, so that the same current flows through each.

A primary cell is a battery (a galvanic cell) that is designed to be used once and discarded, and not recharged with electricity and reused like a secondary cell (rechargeable battery). In general, the electrochemical reaction occurring in the cell is not reversible, rendering the cell unrechargeable.

Summary. In a parallel circuit there is more than one path for the current to flow along. When cells are connected in parallel the total value of the cells is the same as each individual cell. For two 1.5 V cells in parallel, the voltage stays at 1.5 V, but the life of the battery is doubled.

When cells are connected in parallel the total value of the cells is the same as each individual cell. For two 1.5 V cells in parallel, the voltage stays at 1.5 V, but the life of the battery is doubled.

When batteries are hooked up In series, the voltage is increased. For example, two – 6 Volt batteries connected in series produce 12 Volts. When batteries are hooked up in parallel, the voltage remains the same, but the power (or available current) is increased. This means that the batteries would last longer.

The battery is a combination of two or more cells. This can be prepared by placing two or more electric cells properly in a cell holder, such that the positive terminal of one cell is connected to the negative terminal of the other. A piece of wire is connected to each of the two metal chips on the cell holder.

An electrical cell is an “electrical power supply”. It converts stored chemical energy into electrical potential energy, allowing positive charges to flow from the positive terminal to the negative one through an external circuit. This is called a current.

Combination of two or more cells is called battery. The cells should be arranged as the positive terminal of one cell is connected to the negative terminal of the next cell It is shown in the below figure.

To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell.

The symbol for a battery is made by joining two more symbols for a cell together. Think of what we usually call a single battery, like the type you put in a torch. In physics, each of these is actually called a cell . It is only when you have two or more of these cells connected together that you call it a battery.

Answer: The positive terminal (+) of one cell should always be connected to negative terminal (-) of another cell. But in case of above circuit both the positive terminals are connected to each other.

By definition, 1 V is a potential energy difference of one joule PER COULOMB of charge between two points. That answers your question. 1.5V means that there is a potential energy difference of 1.5 joules per coulomb between the points where that potential difference is measured. Similar for 9V, 12V, or 480,000 V.

AAA, AA, C, and D batteries are all 1.5 Volts. Regular, heavy duty, and alkaline, all are 1.5 volts. However, current rechargeable batteries, Nickel Metal Hydride, only output 1.2 volts. Most things that operate on 1.5 volts will operate on 1.2 volts, but may not work as well, or only for limited time periods.

Normal AA/AAA batteries that have a voltage rating of 1.5V can supply constant 50mA current for a total capacity of 1800-2600 mAh charge and 3.90Wh of energy- Alkaline batteries.

This means that a battery with an EMF rating 1.5 v can supply a maximum of 1.5 v of electric energy in an open circuit and when the circuit is closed it will have a potential difference of 1.5 v.