PHYS 101 Quiz Electricity
PHYS Quiz: Electricity and Magnetism
Module 7: Week 7
- A battery operating a large flashlight produces a current of 2 amperes in a light bulb that has a resistance of 4 ohms. The voltage of the battery is
- A current can be made to flow in a wire if
- The greenhouse effect is occurring because
- The energy per unit charge supplied by a battery is its
- Global warming
- Two charged bodies separated by a distance d exert an electrical force on each other. The distance d is doubled. The electrical force on each body now
- The ionosphere
- The SI unit of electric charge is
- An iron nail is brought near a magnet. Which of these is not true?
- The type of EM radiation that has wavelength just a bit shorter than that of visible light is
- Lightning is dangerous to humans because lightning strokes
- A positive ion is formed when
- The energy used by a 100-watt light bulb in 1 hour is
- An electric motor on an airplane operates on 21.5 volts and draws a current of 11.0 amperes. How much energy (in joules) does the motor use during a 9.0-hour flight?
- An object that has zero resistance is a
- A battery operating a large flashlight produces a current of 2 amperes in a light bulb that has a resistance of 4 ohms. The voltage of the battery is 2 volts.
- For a body emitting blackbody radiation, the total power emitted is proportional to the 4th power of the body’s absolute temperature: As the temperature of an object increases, the wavelength of the brightest light emitted increases.
- Voltage can also be called potential.
- The energy used by a 100-watt light bulb in 1 hour is 360,000 joules
- For a body emitting blackbody radiation, the total power emitted is proportional to the 4th power of the body’s absolute temperature: A body in a room at 300 K is heated to 3,000 K. The wavelength of the most intense EM radiation emitted by the body at 3,000 K is 10 times the wavelength of the most intense EM radiation at 300 K.
- An object that has zero resistance is a semiconductor.
- The ozone layer absorbs infrared radiation from sunlight.
- A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts. If two slide projectors are connected in parallel across the same 120-volt source, the current drawn from the source remains at 6 amperes.
- In a circuit connected to a battery, the current flows from negative pole toward the positive pole of the battery.
- Larger batteries have higher output voltages.
- Select the closest matching pairs possible. Voltage, Changing Magnetic Field, Electromagnetic Wave, Changing Electric Field, Power
- Write Ohm’s Law A potentiometer is a variable resistor that can be adjusted given the needs of the application. For a 24-volt circuit compute the resistance that should be set to obtain the following current levels: