| A | B |
|---|
| If the measured resistance of a lamp is 45 Ω when it operates at a power of 80.0 W, what is the current in the lamp? | 1.3 A |
| A steam turbine at an electric power plant delivers 4500 kw of power to an electrical generator that converts 95 percent of this mechanical energy into electrical energy. What is the current delivered by the generator if it delivers energy at 3600 V? | 1.2 x 10 (3) A |
| If a 9.0 V battery is connected to a lightbulb, what is the potential difference across the bulb? | 9.0 V |
| Three resistors with values of R1, R2, and R3 are connected in parallel. Which of the following expresses the total resistance, R eq, of the three resistors: | R eq= (1/R1 + 1/R2+ 1/R3)-1 |
| Two resistors with values of 6.0 Ω and 12 Ω are connected in parallel. This combination is connected in series with a 2.0Ω resistor and a 24 V battery. What is the current in the 2.0 Ω resistor? | 4.0 A |
| A 2.0 m wire segment carrying a current of 0.60 A oriented parallel to a uniform magnetic field of 0.50 T experiences a force of what magnitude? | 0.60 N |
| A loop of wire is held in vertical position at the equator with the face of the loop facing in the east-west direction. What change will induce the greatest current in the loop? | Rotating the loop so its face is north-south |
| How is a motor's mechanical energy able to perform mechanical work? | A shaft connected to the rotating coil is attached to some external device. |
| Which conversion process is the basic function of the electric generator? | Mechanical energy to electrical energy |
| A step-up transformer used on a 120 V line has 85 turns on the primary and 2850 turns on the secondary. What is the emf across the secondary? | 3600 V |
