Q1\ An ohmmeter has a moving coil of resistance 25 2 with 5mA full scale deflection current. The voltage of the battery is 5V. If a resistance of 200022 is used to give half scale deflection, calculate: The resistance R₁ and the shunt resistance?
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- Five years ago, when the relevant cost index was 120, a nuclear centrifuge cost $40,000. The centrifuge had a capacity of separating 1500 gallons of ionized solution per hour. Today, the boss wants to build a centrifuge with capacity of 4500 gallons per hour, but the cost index now is 300. Assuming a power-sizing exponent of 0.75, determine the approximate cost in today's dollars of the new, larger reactorFind the conductance of 100 ft of No. 15 AWG iron wire, which has a diameter of 64 mils. The temperature is 200 Find the resistance at 350C of an aluminum wire that has a length of 200 m and a diameter of 1 mm.solve a,b and c please. In a concentric spherical electrode system, the outer radius is 15cm, the perforation of the insulator between the spheres since its resistance is 90 kV / cm, a) Obtain the equation for the breakdown voltage. b) Since 300kV is applied between the electrodes, r1 (inner radius) can be taken to prevent piercing of the system. what range are the values? c) What is the maximum voltage value that the system can withstand?
- (6) A battery pack of 30 nickel metal hydride battery modules powers a high performance electric vehicle. Each module has an open circuit voltage of 13 V and an effective resistance of 10 mohm for a 10 second acceleration pulse. What is the peak power capability of this battery pack using the USABC definition (peak power = 2/9 x Voc2/R where Voc is the open circuit voltage and R is the resistance)A. 75 kWB. 113 kWC. 338 kWD. 507 kW10: Which energy can produde 2 trillion watts of electricity? a. Ocean Wave Energy b. OTEC c. Wind d. Fuel cell 11: A PV module can produce electricity by using fuel and oxidant. Select one: True FalseIn a design task, a wire of 2000 m requires to exhibit a voltage drop of 2.5 Vwhen 3.2 A of current passes though it. Based on the Table Q1 (b) below, inyour opinion, which of the wire is the most suitable for aviation when the fuelsaving is another factor to be considered as well.
- 1.) An incandescent lamp, rated at 100 watts, gives a certain amount of light when placed across the 120V ac power line. Would the amount of light increase, decrease or remain the same, when the lamp is placed across a 120V dc power line? Discuss. 2.) Explain what is meant by effective current and effective voltage.Questions 1-4 relate to a battery pack for the Tesla Roadster EV consisting of 6,831 small cylindrical lithium-ion cells (18650 format). The battery pack has series-parallel arrangement: of 99 cells in series, and 69 strings (series-connected string) in parallel. Assume this battery pack is fabricated from LG 18650 cells and the LG CHEM 18650 Cell Specifications are: Nominal Voltage: 3.7V Capacity: 2800mAh Max Discharging current: 5A (continuous) Size: 18650 (Cylindrical) Length: 65 mm Diameter: 18 mm Weight: 46.5 g Retail Cost: $15.50. What is the specific energy of each cell (Wh/kg)? Q2. What is the battery pack voltage (OCV)? Q 3. What is the battery pack capacity (Ah)? Q4.What is the battery pack energy (kWh)?Explain (in your own words) what is meant by the terms, effective current andeffective voltage.
- The resistance of a coil aluminum wire at 21OC is 210Ω. The temperature of the wire is increased and the resistance rises to 240Ω. If the coefficient of resistance of aluminum is 0 .0039/OC at 21OC, determine the temperature to which the coil has risen.A specification sheet of a smart meter states that its rated current is 100 A and power dissipation is 3 W. It employs a current-sensing resistor of 200 μ. When the load current is at the rated value of the meter, calculate the power dissipation in all the other components of the meter.Heat energy is often measured in calories and 1 calorie = 4.184 Joule. It is desired to design a heating element to boil a certain amount of water in 2 min requiring 40-kcal heat energy. If the heater is to operate at 110-V, calculate its current and power ratings.