Chapter 2 - Resistors - Grob's Basic Electronics 13th

A carbon composition resistor having only three color stripes has a tolerance of: a. ±5% b. ±20% c. ±10% d. ±100%

b

A resistor with a power rating of 25 W is most likely a: a. carbon-composition resistor b. metal-film resistor c. surface-mount resistor d. wire-wound resistor

d

When checked with an ohmmeter, an open resistor measures: a. infinite resistance b. its color-coded value c. zero resistance d. less than its color-coded value

a

One precaution to observe when checking resistors with an ohmmeter is to: a. check high resistances on the lowest ohms range b. check low resistances on the highest ohms range c. disconnect all parallel paths d. make sure your fingers are touching each test lead

c

A chip resistor is marked 394. Its resistance value is: a. 39.4 Ω b. 394 Ω c. 390,000 Ω d. 39,000 Ω

c

A carbon-film resistor is color-coded with red, violet, black, and gold stripes. What are its resistance and tolerance?: a. 27 Ω ± 5% b. 270 Ω ± 5% c. 270 Ω ± 10% d. 27 Ω ± 10%

a

A potentiometer is a: a. three-terminal device used to vary the voltage in a circuit b. two-terminal device used to vary the current in a circuit c. fixed resistor d. two-terminal device used to vary the voltage in a circuit

a

A metal-film resistor is color-coded with brown, green, red, brown, and blue stripes. What are its resistance and tolerance?: a. 1500 Ω ± 1.25% b. 152 Ω ± 1% c. 1521 Ω ± 0.5% d. 1520 Ω ± 0.25%

d

Which of the following resistors has the smallest physical size?: a. wire-wound resistors b. carbon-composition resistors c. surface-mount resistors d. potentiometers

c

Which of the following statements is true?: a. Resistors always have axial leads b. Resistors are always made from carbon c. There is no correlation between the physical size of a resistor and its resistance value d. The shelf life of a resistor is about one year

c

If a thermistor has a negative temperature coefficient (NTC), its resistance: a. increases with an increase in operating temperature b. decreases with a decrease in operating temperature c. decreases with an increase in operating temperature d. is unaffected by its operating temperature

c

With the four-band resistor color code, gold in the third stripe corresponds to a: a. fractional multiplier of 0.01 b. fractional multiplier of 0.1 c. decimal multiplier of 10 d. resistor tolerance of ±10%

b

Which of the following axial-lead resistor types usually has a blue, light green, or red body?: a. wire-wound resistors b. carbon-composition resistors c. carbon-film resistors d. metal-film resistors

d

A surface-mount resistor has a coded value of 4R7. This indicates a resistance of: a. 4.7 Ω b. 4.7 kΩ c. 4.7 MΩ d. none of the above

a

Reading from left to right, the colored bands on a resistor are yellow, violet, brown and gold. If the resistor measures 513 Ω with an ohmmeter, it is: a. well within tolerance b. out of tolerance c. right on the money d. close enough to be considered within tolerance

b