1. An electron moves at a speed of 58,000 m/s perpendicular to a 0.024-Tesla magnetic field. What is the larmor radius for the electron's motion? 2. In the circuit shown, R1 = 100 ohms, R2 = 20 ohms,...

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1. An electron moves at a speed of 58,000 m/s perpendicular to a 0.024-Tesla magnetic field. What is the larmor radius for the electron's motion? 2. In the circuit shown, R1 = 100 ohms, R2 = 20 ohms, and R3 = 60 ohms. The circuit is connected to a 15-V battery. What is the resulting current the battery supplies? Units in mA 3. A dipole of charge +/- 6.0 microCoulombs is separated by 17.5 cm. What is the force between the charges? 4. A sphere is charged to 12.5x10 -6 C. What is the electric potential energy of a 4.00-nanoCoulomb charge placed 7.5 cm away from the middle of the sphere? Units in JOULES 5. A particular X-Ray beam has a wavelength of 0.15 nm. What energy are this beam's photons? 6. A 2.20m x 1.75m window on a house is facing exactly 45.0o NorthEast. If Earth's magnetic field is taken to be 4.67x10 -5 T directly North at the house's location, what is the magnetic flux through the house's window? 7. A ray of light enters diamond at an angle of 65o with respect its surface normal. What direction does the ray go after entering the material? 8. You want to connect a high-output resistor (a heating filament) to a 30-V power supply to achieve 100W of power output. What should be the resistance of the filament? 9. A parallel-plate capacitor has a voltage of 16V across its plates. The plates have an area of 0.60 m2 and are 0.12 mm apart. What charge resides on the plates?         10. A 15-microCoulomb charge enters a region of magnetic field at a speed of 120,000 m/s. The charge experiences a force of 25 Newtons. What is the minimum strength the magnetic field must be? 11. An object is located at twice the focal length of a converging lens. Which is true of the image? 12. Two charges, each +1x10 -6 C, are 2.0 meters apart. Which is true about the empty spot exactly halfway between the two charges? 13. A real 6.00-V battery has an internal resistance of 2.20 ohms. The battery is used to power a 20.0-ohm load. What is the current delivered to the load device?   14. Two equally-sized ornaments are charged with -20 nC and +15 nC of charge. After being allowed to touch, what charge does each hold? 15. An electric field with a magnitude of 600 V/m is pointed to the right as shown in the diagram. What is the potential difference between points A and B? 1. An electron moves at a speed of 58,000 m/s perpendicular to a 0.024-Tesla magnetic field. What is the larmor radius for the electron's motion? 2. In the circuit shown, R1 = 100 ohms, R2 = 20 ohms, and R3 = 60 ohms. The circuit is connected to a 15-V battery. What is the resulting current the battery supplies? Units in mA 3. A dipole of charge +/- 6.0 microCoulombs is separated by 17.5 cm. What is the force between the charges? 4. A sphere is charged to 12.5x10 -6 C. What is the electric potential energy of a 4.00-nanoCoulomb charge placed 7.5 cm away from the middle of the sphere? Units in JOULES 5. A particular X-Ray beam has a wavelength of 0.15 nm. What energy are this beam's photons? 6. A 2.20m x 1.75m window on a house is facing exactly 45.0o NorthEast. If Earth's magnetic field is taken to be 4.67x10 -5 T directly North at the house's location, what is the magnetic flux through the house's window? 7. A ray of light enters diamond at an angle of 65o with respect its surface normal. What direction does the ray go after entering the material? 8. You want to connect a high-output resistor (a heating filament) to a 30-V power supply to achieve 100W of power output. What should be the resistance of the filament? 9. A parallel-plate capacitor has a voltage of 16V across its plates. The plates have an area of 0.60 m2 and are 0.12 mm apart. What charge resides on the plates?         10. A 15-microCoulomb charge enters a region of magnetic field at a speed of 120,000 m/s. The charge experiences a force of 25 Newtons. What is the minimum strength the magnetic field must be? 11. An object is located at twice the focal length of a converging lens. Which is true of the image? 12. Two charges, each +1x10 -6 C, are 2.0 meters apart. Which is true about the empty spot exactly halfway between the two charges? 13. A real 6.00-V battery has an internal resistance of 2.20 ohms. The battery is used to power a 20.0-ohm load. What is the current delivered to the load device?   14. Two equally-sized ornaments are charged with -20 nC and +15 nC of charge. After being allowed to touch, what charge does each hold? 15. An electric field with a magnitude of 600 V/m is pointed to the right as shown in the diagram. What is the potential difference between points A and B?
May 04, 2021
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