Exam 3: Resistors

The two main characteristics of a resistor are its resistance in ohms and its tolerance in mhos.

The main function of a resistor is to limit the amount of current or produce a desired drop in voltage.

The way resistance varies with shaft rotation in a variable resistor is called the

When checking resistance in a circuit, it is important to be sure there are no parallel resistance paths.

A decade resistance box is typically used as a potentiometer.

A thermistor is a thermally sensitive resistor whose resistance value changes with changes in operating temperature.

What type resistor is frequently used in electronic circuits in which it is desired to provide temperature control?

If a resistor is color-coded red, blue, and orange, what is its resistance value?

The resistance value of a chip resistor is determined from the

The most common trouble in resistors is

A ______________ resistor is a wire-wound resistor made to burn open easily when the power rating is exceeded.

What may cause a much lower resistance value to be displayed on an ohmmeter when checking resistance in a circuit?

What resistive device is generally used to control relatively large values of current in low-resistance circuits for ac power applications?

The power rating is a property of a resistor that depends on the resistor's

What is the resistor called that is designed to burn open easily when the power rating is exceeded?

Wire-wound resistors are larger and have higher wattage ratings than carbon resistors.

Resistors with higher resistance values usually have ______________ wattage ratings.

When not used, resistors generally keep their characteristics

A rheostat has two terminals and a potentiometer has three terminals.

Aging, which is normal resistor heating over a long period of time causes the resistor to exceed its