ILT 160 study guide 2 Ohms Law

a 300 ohm resistor is connected to a 4-V supply. How many watts will this resistor have to dissipate

0.053

a resistor has color bands of brown, black, brown, and silver. What is the resistance and tolerance of the resistor

100 and 10%

A three-resistor circuit has a total power of 25 W. Two of the resistors dissipate 10 W and 5 W respectively. How much power does the third resistor dissipate?

10W

a resistor has color bands of red, violet, red, and gold. What is the resistance and tolerance of the resistor

2700 and 5%

a series circuit has two resistors. The resistors dissipate 10W and 25W. What is the total power dissipation of the circuit

35W

If a series circuit has resistor values of 237 ohms, 56 ohms, and 82 ohms, the total resistance is

375 ohms

A series circuit has a total resistance of 18 ohms and an applied voltage of 120 volts what is the current flow

6.660A

A two-resistor series circuit has an applied voltage of 100 volts the voltage across the one of the resistors is 40 volts the voltage across the other resistor is

60V

The two resistors in a series circuit have voltages of 15 V and 60 V. The applied voltage is

75V

a series circuit has a total resistance of 24 ohms and a current flow of 4A. What is the applied voltage

96V

A resistor made by applying a film of carbon to a ceramic rod is the _____ resistor.

carbon film

A point which is a common connection for other parts of a circuit is called a _____point.

chassis

A series circuit is a circuit that has only one path for _______ flow

current

In a series circuit the resistors have voltages dropped across them that are proportional to their resistance values if connections are made to various points in the circuit different voltages can be obtained this circuit is called a voltage _______

divider

an electrical connection made by connecting a rod or pipe imbedded in the soil is called a __________ ground

earth

24 ohms is a standard value for 10% tolerance resistors

false

Resistors which have only one ohmic value are called _____ resistors.

fixed

A device that is designed to open and disconnect a circuit in the event of excessive current is a

fuse

devices that will open and disconnect a circuit in the event of excessive current are the ________ and _____________

fuses and circuit breakers

wire wound resistors are often used because they are able to operate at _______ power levels than other resistors

higher

A resistor made by applying a film of metal to a ceramic rod in a vacuum is the _____ resistor.

metal film

A resistor made by combining metal with glass and then applying it to a ceramic base as a thick film is the ______ resistor

metal glaze

A variable resistor that has a shaft that rotates more than one rotation is called a _______ variable resistor

multiturn

The polarity of the voltage across a resistor depends on the direction of current flow through the resistor. The end of the resistor into which current enters is assigned the polarity of _________

negative

The current flow, resistor voltages, and/or resistances in a series circuit can be found by using _____ law.

ohms

A variable resistor is also called a

potentiometer

A variable resistor with three terminals is called a

potentiometer

A variable resistor with two terminals is called a

rheostat

a circuit that has only one path for current flow is a __________ circuit

series

in a circuit that has very little resistance, almost any applied voltage will result in huge amounts of current. This is called a _________ circuit

short

In a series circuit with two resistors the total resistance is equal to the _________ of the two resistors

sum

when resistors are manufactured, the processes are not perfectly exact. Each resistor may be slightly different from the next one. The plus and minus limits of a resistors marked value is called the _______

tolerance

connecting a 150 ohm, 1/2-W resistor to a 9-volt supply will damage it

true

many resistors use bands of color to indicate the ohmic value and tolerance of the resistor. These bands are interpreted by a color code

true

a resistor whose values can be varied over a range of values is called a _______ resistor

variable

when two or more resistors are connected in series across a voltage supply, each of the resistors will have a voltage across it. The resistor network is known as a _____

voltage divider

The amount of _____ across a resistor is proportional to its resistance.

voltage drop

a resistor made by winding a piece of resistive wire around a ceramic core is the ______ resistor

wire wound