Electronics-Resistance and Power
Electronics-Resistance and Power
42. The word work means that:
- energy has been transferred
- it is inversely related to energy
- no energy has been transferred
- work and energy are not related
43. A good fuse will have:
- zero ohms resistance
- a medium resistance
- a high resistance
- an infinite resistance
44. What property does an incandescent lamp possess?
- cold resistance
- hot resistance
- ballast resistance
- both cold and hot resistance
45. One advantage of a carbon film resistor over a carbon composition resistor is:
- less circuit noise
- smaller size
- higher wattage
- poor tolerance
46. If a metallic conductor has a positive temperature coefficient of resistance, then:
- as temperature increases, resistance decreases
- as current increases, resistance decreases
- as voltage increases, current increases
- as temperature increases, resistance increases
47. If a calculator display was "0.00263," what would this answer be in percent?
- 0.026%
- 0.26%
- 2.63%
- 26.3%
48. A 33 komega.gif resistor with a 20% tolerance checks out as ok with which of the following ohmmeter readings?
- 26400 ohms
- 24183 ohms
- 6600 ohms
- 39970 ohms
49. After a lamp is turned on, its filament resistance will change to become:
- less resistive
- cooler
- brighter
- more resistive
50. Wirewound resistors are usually used in circuits that have:
- high current
- negative temperature coefficients
- low power
- high voltage