Electronics-Resistance and Power
Electronics-Resistance and Power
32. What are the parts of a rheostat?
- wiper and resistor track
- solenoid and armature
- contact and wire wound
- center tape and wiper
33. The load resistance increases. How will the load current change?
- vary
- remain constant
- increase
- decrease
34. What is the power dissipated by a 1.2 komega.gif resistor with 12 volts across it?
- 12 A
- 1.2 A
- 12 A
- 12 mA
35. How many joules of energy will a 10 W lamp dissipate in one minute?
- 10 joules
- 60 joules
- 600 joules
- 3600 joules
36. Which type of test equipment is used to measure resistors?
- ohmmeter
- ammeter
- voltmeter
- watt meter
37. Resistance is:
- the opposition to current flow accompanied by the dissipation of heat
- symbolized by R, measured in ohms, and directly proportional to conductance
- directly proportional to current and voltage
- represented by the flow of fluid in the fluid circuit
38. Electrical equipment is protected against excessive current by a(n):
- fusible wire link
- insulated glass container
- metal ended coil
- circuit opener
39. If resistance decreases, then current will:
- decrease
- increase
- remain the same
- double
40. A wire with a smaller cross-sectional area will produce:
- less heat
- more conductance
- less resistance
- more heat