DC chapter 7,8,13 10/1/18

A parallel circuit composed of a 120 ohm and a 220 ohm resistor has a supply of 240 V, What is the total circuit current?

120x1/x + 220x1/x= 77.64 ohms 240V/77.64 ohms= 3.091 At

Nickel-cadium (ni-cad) cells can produce large amounts of current (similar to lead-acid cells) and can be recharged about ______ times.

2000

As lead-acid batteries age, they may lose some of their capacity. To load test a battery, a load of three times the ampere-hour rating is connected to the battery. The voltage is monitored and after _____ minutes, the voltage should be above _____% of the rated voltage.

3, 80

A two-branch parallel circuit has 2A of current in one branch and 3A in the other branch. The branch considered the larger load is the branch with ______ A

3A

A ni-cad battery containing six cells has a terminal voltage of _____.

7.2 volts

How many cells that are 0.5 volts, a 0.2 Amps are required to create a 12 volt battery that has a 0.5 amp capability?

72

The LeClanche cell is also known as a ____ cell

Carbon-zinc

In a parallel circuit, the amount of current flow in a branch is known as the ______ of the branch.

Load

In a parallel circuit, the total current is equal to the _______ of the individual branch circuits.

Sum

A voltaic cell is constructed of two unlike metals and an electrolyte such as an acid, alkaline, or salt solution. T or F

True

A voltaic cell is constructed of two unlike metals and an electrolyte such as an ______ , alkaline, or salt solution

acid

The current capacity of most cells and batteries is listed in base units of _____.

ampere-hours

Several cells connected together are called a

battery

A combination circuit is a circuit that contains

both series and parallel components

In a parallel circuit, several loads are connected in a single power source. Each separate load circuit is called a(n) ________

branch

A battery is several _____ connected together.

cells

In a series circuit the _______ is the same at any point in the circuit

current

The term "load" refers to the amount of _____ in a circuit branch.

current

In a parallel circuit, the current through each branch is inversely proportional to the resistance of the branch. Because of this, parallel circuits are sometimes called

current dividers

The amount of voltage produced by a cell depends on the materials used to make it. A list of metals showing their willingness to accept electrons is called the _______ series of metals

electromotive

During the charging of lead-acid batteries, it is possible that _____ will be formed. Caution should be observed because this is the most explosive element known.

hydrogen

The measurement of the specific gravity of an electrolyte is done with a device called a(n)

hydrometer

A connection of three (or more) current paths is often called a

node

During the solving of a combination circuit, it is necessary to simplify a parallel block to

one series resistors

A simple parallel circuit is a circuit that contains

only parallel circuits

Circuits that have more than one path for current flow are ______ circuits

parallel

piezolectricity refers to electricity produced by some materials when they are subjected to

pressure

A cell which cannot be recharged is a _____ cell.

primary

A method for finding total resistance of parallel resistors is

product over sum, reciprocal formula, or resistors of equal value

One of the steps that occurs frequently during combination circuit solution is _______ the circuits into a simpler circuit

redrawing

Solving combination circuits includes a step in which you _____ the circuit to a simpler circuit

reduce

the output voltage of a battery (or cell) measured with no load connected will be different in the voltage with a load connected because the battery (cell) has internal

resistance

A cell which can be recharged is a _____ cell.

secondary

In a parallel circuit, the total resistance is ________ value resistance

smaller than the smallest

An electrolyte can be checked to ensure that it has correct chemical composition by measuring its

specific gravity

Thermocouples produce voltage because of the action of two unlike metals. The voltage produced depends on the type of metals used and the _____ difference between the ends of the thermocouple assembly.

temperature

the voltage drop across any branch of a parallel circuit is the same as the

total volts

In a combination circuit, to identify which paths are series and which are parallel, you should

trace the current path(s)

A voltaic cell is constructed of two ______ metals and an electrolyte such as an acid, alkaline, or salt solution

unlike

In 1800 Alessandro Volta was experimenting with producing electricity. He called his battery a _____.

voltalic pile