A dynamometer-type AC ammeter made of moving coils
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- A. It took a heater of 2 KW 158 minutesto raise by 30°C the temperature of water in an industrial vessel. How many gallons of water are inside the vessel? A. 30 gallons B. 10 gallons C. 40 gallons D. 20 gallons B.The ohmic resistance of a large magnetic contactor is measured to be 20 ohms. A 230 V is impressed on the contactor and the current is taken as 3.2 amperes. Neglecting core loss, determine the inductance of the contactor in mH. A. 261 B. 183 C. 315 D. 2511... Why do we use round-shaped coils (I.e., Round shaped turns in the coils) in both the primary and secondary circuits [If those coils were not round-shaped, what would be the problem]? Must show the draw figures 2.... Write down major differences between conducting and displacement current densities with proper figures.The resistance of the field coils with copper conductor of a dynamo is 120 Ohms at 25 o C. After working for 6 hours on full load, the resistance of the coil increases to 148 Ohms. Calculate the mean temperature rise of the field coil. Take the temperature coefficient of the conductor material as 0.0042 at 0 o C.
- A 200-turn coil is immersed in a 60-Hz flux with an effective value of 4 mWb. Obtain an expression for the instantaneous value of the induced emf. If a voltmeter is connected between its two ends, what will be the reading on the voltmeter?A solenoid coil needs to be manufactured which produces an inductance of at least 2000 Gauss (in SI system = Tesla) when a 10mA current flows through the conductor. Due to space limitations, the coil should be composed of 10 turns over a 1cm length. Do the required calculations and select a core material for the coil from the table below. Your answer will be given over the following series of questions. A. H = 0.12566 oersted B. H = 12.56637 oersted C. H = 1.25664 The relative permeability of the manufactured solenoid from the previous question is: A. μr = 15.916 B. μr = 15915.964 C. μr = 1.2665e10 D. None of the mentioned/ Geen van die genoemdeA solenoid coil needs to be manufactured which produces an inductance of at least 2000 Gauss (in SI system = Tesla) when a 10mA current flows through the conductor. Due to space limitations, the coil should be composed of 10 turns over a 1cm length. Do the required calculations and select a core material for the coil from the table below. Your answer will be given over the following series of questions. A. H = 0.12566 oersted B. H = 12.56637 oersted C. H = 1.25664
- A solenoid coil needs to be manufactured which produces an inductance of at least 2000 Gauss (in SI system = Tesla) when a 10mA current flows through the conductor. Due to space limitations, the coil should be composed of 10 turns over a 1cm length. Select a suitable core material for the manufactured solenoid coil from the table. A. MnZn Ferrite B. 4750 alloy C. None of the mentioned/ Geen van die genoemde D. Silicon ironA mild street ring having across sectional area of 600 sq mm and a mean circumference of 500 mm has a coil of 300 turns uniformly around it. Calculate the reactance at the ring and the current required to produce a flux of 800 uwb in the ring. If the relative permeability is 400.Q 03: Briefly discuss, how the energy consumptions for operations of a fork lifter could be justified. Suppose that a fork lifter has a total energy consumption of 150 W.Hr. The total trips of the vehicle are 375. How the battery duty cycle may be calculated in this case?
- Determine the resistance of a copper conductor with a diameter of 6mm and a length of 20m.The resistivity of copper is 1.7?10−8 ohm-meters.2. Find out, and in your own words write what differences in electrical behavior obey.between one material and another (conductors, semiconductors and insulators).3. A copper wire has a resistance of 10Ω at 50 ° F, what resistance will it have at 70 ° C?4. If we have a single-phase motor at a distance of 100 meters and its nameplate registers the followingdata. U = 120V / In = 25th. Calculate the potential drop over the electrical conductor. If we measure at the terminalsconnection of the motor How much would be the voltage registered in the Voltmeter?5. Considering the scheme of the voltage divider (voltage divider) shown in the followingImage, Design the circuit calculating its resistances (R1 and R2) to obtain an output voltage ???? of 5Vmaximum dc, taking into account that the input voltage ??? is 30V dc. (Use values greater than or equal…Determine the resistance of a copper conductor with a diameter of 6mm and a length of 20m.The resistivity of copper is 1.7?10−8 ohm-meters.2. Find out, and in your own words write what differences in electrical behavior obey.between one material and another (conductors, semiconductors and insulators).3. A copper wire has a resistance of 10Ω at 50 ° F, what resistance will it have at 70 ° C?4. If we have a single-phase motor at a distance of 100 meters and its nameplate registers the followingdata. U = 120V / In = 25th. Calculate the potential drop over the electrical conductor. If we measure at the terminalsconnection of the motor How much would be the voltage registered in the Voltmeter?5. Taking into account the scheme of the Voltage divider (voltage divider) shown in the followingImage, Design the circuit calculating its resistances (R1 and R2) to obtain an output voltage ???? of 5Vmaximum dc, taking into account that the input voltage ??? is 30V dc. (Use values greater than or…Rigid metal conduit (RMC) is a threadable raceway of ____ designed for the physical protection and routing of conductors and cables. Select one: A. AN INCOMPRESSIBLE MATERIAL B. GALVANIZED STEEL C. VARIOUS BENDING RADII D. CIRCULAR CROSS SECTION