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- 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.TO 2.The voltage is U=6V. R1= 12 R2 = 22 t I. R3 = 32 ORDE (1)Please CORDEIRO equivalent resistance in the calculate the first LUN TONI2046040 (2)Please calculate the current in the second line I,. R2 line). (R3 line) PADEIRO I. R1 R2 R3Q1. How many electrons per second are necessary to produce 1.0 nA of current? (e = 1.60 × 10-19 C) Q3. A +7.5 nC point charge is 5.0 cm from a -9.4 µC point charge in your laboratory in California. How much work would you have to do if you left the +7.5-nC charge in the lab but took the -9.4 µC charge to New York City? If you then released the +7.5, how much KE would it have once it returned to Cali? 3 parallel + 1 in series – Find Req Q5. How would you reduce Req of a circuit by adding a resistor – numerical piece to follow.
- Compare between incandescent lamps (70 watt) and CFL lamp (17 watt). if the price of incandescent is 3 NIS and the price of the florescent is 12 NIS and the price of the KWH is 0.5 NIS assuming that both lamps will work 10000 hours, how many NIS we save when we use CFL lamps. ut of uestion Select one: a. 137.5 NIS Ob. 271 NIS O c. 230 NIS d. none of these e. 150 NIS1. An isolated parallel-plate capacitor has an inital capacitance of 400nF and a charge of 5uC. Find the potential energy if the stored charge is doubled. A. - 125uJ B. 125uJ C. 93.8uJ D. 31.3uJ 2. With the following statements regarding resistivity and conductivity of a thing, which is/are ALWAYS TRUE? I. Resistivity of a thing is temperature-dependent. II. Conductivity of a thing is temperature-dependent. III. When resistivity of a material increases, then there is a decrease in conductivity. Please answer both question for a 100% rating.e energy expended in moving a charge of 50 uC rence of 6V? 00)%3720 kW.h 720 kJ x10 J 300 pJ A %TY . 9 * much aplies a current of 4A for 20 esistance ? - Prove that W = S P.dt ? t2
- 424 uiz Electromagnetism Question 6 of 10 A student made the electromagnet shown and used it to pick up one sewing pin. She then doubled the number of coils around the nail and used it to pick up two sewing pins. How could she change the electromagnet again in order to pick up three sewing pins?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.D. Find the potential of the unknown source and the reading in Ammeter A2. Ammeter A1 reads 0.06 A. The direction of the currents (positive flow) is indicated by the arrows shown. 6 V 202 1202 ww A2 A. 3002 A2 = V =
- 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 F1)lf 6.24 x1018 electrons pass through a wire in 1 s, how many pass through it during a time interval of 2 hr, 47 min and 10 s? 2)What is the appropriate prefix and its abbreviation for each of the following multipliers ? а. 1000 b. 1 000 000 с. (10°) e.(103) d. 0.000 001 f. (10-12)4. Voltage. A cell has a terminal voltage of 50 V for a current of 10.0 A, and 54 V for a current of 6.0 A. Find the electromotive force and internal resistance of the cell. Hint: Use V = EMF – Ir for each set of given V and I, take note of the two equations formed then determine EMF and r by solving the two-variable linear equations.