Question 1

Wire wound resistors are often made by winding nichrome wire on a hollow ____ tube.&#10;A) glass&#10;B) steel&#10;C) PVC&#10;D) porcelain

Accepted Answer

Porcelain is a high temperature, electrical insulator material that is commonly used in electronic components such as resistors. It is also able to withstand high temperatures, making it suitable for wire wound resistors which can generate a lot of heat when in use.

Question 2

Resistors with a tolerance rating &#177;1% have a(n) fifth band that is ____.&#10;A) brown&#10;B) orange&#10;C) yellow&#10;D) white

Accepted Answer

The fifth band on a resistor indicates the tolerance. A brown band represents a tolerance of ±1%.

Question 3

People often employ light bulbs as small heaters to protect well pumps during periods of cold weather.

Accepted Answer

This is true as light bulbs generate heat and can be used to prevent freezing of water in pipes and pumps during cold weather.

Question 4

Wire wound resistors generally have the ohmic value and power rating written on the resistor.

Accepted Answer

This is true, wire wound resistors typically have their ohmic value and power rating clearly marked on the resistor.

Question 5

A variable resistor is a resistor whose values can be modified over a range.

Accepted Answer

The statement accurately describes a variable resistor.

Question 6

Resistors with a tolerance rating of &#177;2%, &#177;5%, and &#177;10% have ____ color bands.&#10;A) two&#10;B) three&#10;C) four&#10;D) five

Accepted Answer

Resistors with a tolerance rating of ±2%, ±5%, and ±10% have four color bands. The first and second bands represent the significant digits, the third band represents the multiplier, and the fourth band represents the tolerance.

Question 7

A resistor with a(n) ____ fifth band indicates the leads are solderable.&#10;A) yellow&#10;B) orange&#10;C) black&#10;D) white

Accepted Answer

The answer of A resistor with a(n) ____ fifth band...

Question 8

Electric heating resistors are generally made from a special type of wire called nickel.

Accepted Answer

Electric heating resistors are often made from materials like nichrome, a nickel-chromium alloy, rather than pure nickel, due to its high resistance and durability at elevated temperatures.

Question 9

Resistors in sizes ranging from 8 to 20 watts generally have their values marked with bands of color.

Accepted Answer

Resistors in the range of 8 to 20 watts are typically too large for color coding, which is commonly used on smaller, lower wattage resistors (usually up to 2 watts). Larger resistors often have their values printed or stamped directly on their bodies.

Question 10

A resistor with a value of 120 ohms would produce 120 watts of heat when connected to ____.&#10;A) 110 volts&#10;B) 120 volts&#10;C) 220 volts&#10;D) 240 volts

Accepted Answer

Power (P) = Voltage (V) squared / Resistance (R)P = V^2 / R120 = V^2 / 120V^2 = 120 * 120V = 120 volts

Deck 48: Resistors and Color Codes