Electricity?

Question

What is the difference between a cell and a battery?

Elctrons flow from the______?terminal to the _____ terminal?

What is the difference in terms of voltage, of connecting circuits in series or parallel?

Which circuit will produce bulbs that will burn at a higher intensity A or B?

Answer 1

A Battery is a group of cells. Common misuse identifies many cells as batteries specifically the AAA,AA,C & D sizes, these are actually cells by definition. A 9v transistor battery is truely a battery as it is made up of several 1.5V cells wired together to achieve 9V.

Electrons flow from the negative to the positive

Series vs parallel circuits.

Series the voltage divides across the loads while the current is the same through all loads.

Parallel the current divides across the different loads while the voltage is the same across each load.

In a series circuit as you add lightbulbs the brightness of each will diminish as the voltage divides across the total number of bulbs. In a parallel circuit the voltage on each bulb is the same as the supply , Voltage doesn't divide up., However the total current flow supplied is divided and split up amoung all of the light bulbs. The parallel lights will be brighter as each will have full voltage applied to it....

Answer 2

A cell is a single electrochemical unit.
A battery is comprised of multiple cells.

Electrons flow from the negative terminal to the positive terminal. Note that this is opposite the direction that 'current' flows from an electrical engineering perspective.

In series circuits, the voltages are added across all the series elements, and the current is the same through each element. In parallel circuits, each element sees the same voltage, and the currents are additive.

Can't answer the last question since the details of the circuits are not shown.