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Electrons flow through a 2.5-mm-diameter aluminum wire at 1.3×10-4 m/s Part A How many electrons move through a cross section of the wire each day? Express your answer using two significant figures. ΑΣΦ ? N = Submit Request Answer

Activity 3 Letter C only

Can you help with subparts 3a and 3b   A clock battery wears out after moving 9600 C of charge through the clock at a rate of 0.540 mA. 3a. How long did the clock run?    3b. How many electrons per second flowed?   This is not and will not be graded

Part A.EMF or PD? Directions: Identify the statement below whether an emf or PD. Write E if the statement shows electromotive force, and P if the statement shows potential difference. 1. The energy supplied to the unit charge by the cell. 2. The energy dissipated as the unit charge passes through the components. 3. Present even when no current is drawn through the battery. 4. Across the conductor is zero in the absence of current. 5. Its unit is volt, and symbol is E. 6. Its unit is volt, and symbol is V. 7. It is always greater than potential difference. 8. It is always less than emf. 9. It transmits current both inside and outside of the cell. 10. Transfer current between two points in the cell. 11. Its formula is E = I(Rtr); where Rtr stands for total internal and external resistance. 12. Its formula is V = E – Ir. 13. It does not depend on circuit resistance. 14. It directly depends on the resistance between two points of measurement. 15. It causes electric, magnetic, and…

II. Problem Solving. Show your solutions. Box your final answer. 1. A water heater has a resistance of 502 and takes 15A during operation. If it is in service on the average of 45minutes per day, how many kWh of energy will be consumed for 2 weeks? 2. Two particles with charges of 5 uC and 8µC attract each other with a force of 65mN. Determine the separation distance between the two particles. 3. What separation distance is required if the attractive force between an electron and a proton is 50N? 4. The distance between two identical charges is 20cm and experiencing 50kN of force. Find the value of the charges. 5. A sphere has a negative charge of 640nC. Approximately how many electrons must be removed to make the sphere neutral? 6. How much electrical energy in kWh is delivered to an electric motor during a 48 minutes' operation from a 220v source if it draws 12A of current? If Meralco takes Php12.00 per kWh, how much is the electric bill cost for 1 month? Assume 1 month = 30 days.

Required information Problem 05.P001 Section Break In the circult below VA 15.5 V. R 126 Q, and R 66 0 R. B. Problem 05.P001.c Calculate the voltage across polnts E and F

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Activity 3 Letter A only

1.What is the effect on charging and discharging times if the capacitance is increased? What mathematical relationship exists between your times and the capacitance? 2. What is the effect on the total capacitance if capacitors are combined in series? What if they are combined in parallel? 3. What is the effect on charging and discharging times if the resistance of the circuit is increased? What mathematical relationship exists between your times and the resistance?

Part A 1.00 x 1020 electrons flow through a cross section of a 3.80-mm-diameter iron wire in 5.50 s You may want to review (Pages 743 - 745) What is the electron drift speed? um/s Submit Request Answer Provide Feedback

According to the theory of electricity, which of the following statements is not true about electrical conductors and electrical insulators? Charged particles refer to particles having electrical charge in SI units of Coulombs. Select the correct answer O Both types of materials are made out of atoms Some conductors do not allow electrons to move freely inside them. O It is sometimes possible for electric current to flow through insulator. Both positive and negative charged particles contribute to the properties of some conductors. Select this answer if all of the choices are true

General Physics. Thank you

A. Solve and write your complete solution to the following problems. a E, = 5V R,= 30 E, = 12V R2= 10 R3= 20

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Calculate the total capacitance and total charge of the circuit in Figure 1.a. Assume all capacitors are 10 microfarad and 20 V battery as power source.

f. What is true of the voltage inside a solid conductor in electrostatic equilibrium? Choose one! The voltage inside a positively charged conductor increases as one approaches the center. The voltage inside a positively charged conductor decreases as one approaches the center. The voltage inside a conductor must be zero. The voltage inside a conductor is the same everywhere inside and is equal to the voltage at the surface. i. ii. iii. iv. g. What is the voltage difference between an initial point at a distance 4b from the central axis and a final point at the center axis of the metal cylinder? No new calculation should be required.

QUESTION 4 Refer to Circults A and B below and answer the questions that follow. Circult A Circuit B 9 V S. Sr 1,5 0 1,5 A 1,5 Q 20 A 40 V. V. V. 4.1. Define the term emf. (2) 12. Calculate the total resistance of Circuit A. (2) 431 Consider Circuit B. 43.1 Write down the reading on A,. 4.32, Calculate the reading on V.. (3) na third resistor (1,5 0) is placed in parallel with the existing resistors in Circuit A. would the total current in the circuit INCREASE, DECREASE or REMAIN THE SAME? Explain the answer. 44

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Fish are reasonably safe during a lightning storm; however, human swimmers are advised to get out of the water. Assuming that water is a conductor, why are humans typically more at danger than fish? Choose the best answer. a. Fish hearts don’t require electrical impulses to function b. Humans tend to swim closer to the surface of the water c. Fish convert the electricity to light d. Humans have a higher 23Na concentration than fish e. Fish scales act as miniature lightning rod

Which of the following is an installation requirement for the grounding electrode conductor in a communications system? A. It must be run as straight as practicable. B. It must be, at minimum, 4 AWG. C. It must be solid or stranded aluminum. D. It must be isolated and covered.

Part B. Finding the PD Directions: Solve the following problems. Write your answer on a clean sheet of paper. Show your solutions. 1. To carry how much charge between two points having potential difference equal to 220 V, 1760 J of work is done? Ans. 8 C 2. The EMF of a cell falls from 3 volts to 2.8 volts when its terminals are joined to an electrical load of 4 Ohms. Calculate the internal resistance of the cell.

General Physics. Thank you

Q5 Choose Two only A) Explain briefly various theories of breakdown in liquid dielectrics. B) What are the requirements of a sphere gap for measurement of high voltages? Discuss the advantages and disadvantages of sphere gap for measurements. C) Determine the Townsend's first ionization coefficient if a steady current of 500 µA flows through the plane electrode separated by a distance of 0.4cm when a voltage of 10 kV is applied. A current of 25 µA flows when the distance of separation is reduced to 0.1 cm and the field is kept constant at the previous value. Find also the value of y if the breakdown took place when the gap distance was changed to 0.7 cm.