Purchase Solved Liberty University PHYS 101 Quiz 7
Purchase Solved Liberty University PHYS 101 Quiz 7
- Voltage can also be called
- The type of EM wave having the highest frequency is
- The type of EM radiation that has a wavelength just a bit longer than that of visible light is
- A quantity that measures the opposition to the flow of charge is
- When a 12-volt car battery is short-circuited with a wire, the current drawn
- from the battery is 100 amperes. The resistance of the wire is
- The electric field shown is produced by a single-point charge at the center of the picture.
- The type of EM radiation emitted when high-speed electrons decelerate as they are smashed into a metal target is
- Why do we use fuses?
- For a body emitting blackbody radiation, the total power emitted is proportional to the 4th power of the body’s absolute temperature:
- A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results are because
- A superconductor expels any magnetic field from its interior. This is called
- Lightning is dangerous to humans because lightning strokes
- Global warming
- The greenhouse effect occurs because
- A heater is rated at 1200 watts for a 120-volt source.
- The ozone layer absorbs infrared radiation from sunlight.
- Higher frequency radio waves are reflected by the ionosphere.
- Semiconductor technology has been the basis for many new electronic devices.
- The increase in the amount of carbon dioxide in the atmosphere is contributing to the greenhouse effect.
- Current is the opposition to the flow of charge.
- 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.
- The ionosphere reflects high-frequency radio waves.
- For a body emitting blackbody radiation, the total power emitted is proportional to the 4th power of the body’s absolute temperature:
- If an electric toaster operating on 120 volts draws a current of 6 amperes, the resistance of the toaster is 20 ohms.
- The frequency of visible light determines its color.
- Select the closest matching pairs possible. 3 pts for each response. 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:
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