5 Fundamentals of Electricity: Unit 5 - Resistors

1 ft-lb/s = _____ Watts

1.36

Magnetic _____ _____ _____ repel each other and never cross.

lines of flux

Connecting a 150 Ω, ½-W resistor to a 9-V supply will damage it.

True

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

True

24 Ω is a standard value for 10% tolerance resistors.

False (33 is the correct answer)

A/n _____ is the smallest part of an element.

atom

A resistor whose value can be varied over a range of values is called a _____ resistor.

variable

A 30-Ω resistor is connected to a 4-V supply. How many watts will this resistor have to dissipate?

.53 Watts

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

carbon film

A resistor made from a compound of carbon and resin bonding material is the _____ resistor.

composition carbon

Nuisance static charges are more likely to occur when the air is _____.

dry

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

fixed

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.

multi-turn

A variable resistor is also called a _____.

pot switch

A variable resistor with three terminals is called a _____.

pot switch

A variable resistor with two terminals is called a _____.

rheostat

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

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

Wire-wound resistors are often used because they are able to operate at _____ power levels than other resistors.

higher

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

1000 Ω

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

270 Ω

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 resistor's marked value is called the _____.

tolerances

A resistor made by winding a piece of resistive wire around a ceramic core is the _____ resistor.

wire-wound