A coil of 1000 turns is uniformly wound on a ring of non-magnetic material, the mean diameter being 20 cm. The cross sectional area of the coil is 4 square cm. Determine the self-inductance of the coil.
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- An inductor is constructed by winding a coil of 100 turns around a magnetic core. The core is a cylinder with radius 0.5 cm and the core material has relative permeability of 1000. The coil covers a length of 10 cm. Determine the resulting inductance. Enter your answer in mH rounded to two decimal places.A coil that con sists of 450 windings is wound aroundabakelite ring. The mean diameter of the ring is 100 mm and the diameter of the bakelite core is 20 mm. The currentthrough the coil is 3 A. Determine: 1.1 a) the field stren gth b) the flux den sity c) the total flux A ringhas two halves. The onehalf is made from Cast iron, while the other is made from Cast steel. The two halves are held 1 mm apart with the aid of a paper disc. The cross-section al area and mean circumference of the ringis 345 mm? and0.6 m respectively. Therelative permeability of cast iron is 2400, while that of cast steel is 600. The ring has a coil with 200 win dings. The currentflow through the coil causes a flux den sity of 0.48T. 1.2 Calculate the: a) mmi b) currentflow Ignore the effects of fringing andleakage.Choose correct answer ? Mutual inductance between two magnetically coupled coils depends on the ........................ * Current direction and coupling coefficient Dot polarity and coupling coefficient Current direction, coupling coefficient and dot polarity Current direction and dot polarity
- An air core toroidal coil has 120 turns, the length is 12 cm and 12 sq. cm in area What is the current required to set up a flux of 1.2x10° weber. What is the current?GENERAL RLC CIRCUITS: Solve and show your solution completely. Make sure your answers are in 4 decimals places. The ohmic resistance of a large magnetic contactor is measured to be 20 ohms. A 230 V 60 Hzis impressed upon the contactor and the current is taken as 3.2 amperes. Neglecting core loss,determine the inductance of the contactor in mH.A steady current of 3.5 A is flowing through an inductor with 50 volts across it. Find (a) Inductance of the coil if the current falls to zero in 120 msec, (b) Energy stored in the inductor, (c) Number of turns in the inductor for a flux of 40 mWb. adows bu bolow and find the value of current flowind
- 5. An iron core 0.4m long and 5 cm?. In cross section, is wound with 300 turns. When a current of 0.5 A flows in the coil, how much is the inductance of the coil. Assume the core has a pemeability of 2500.7. A coil having a resistance of 20 ohms and an inductance of 0.75 henry is connected in series with a 30-ohm resistor and to a 120-volt d-c source. A switch across the series resistor is then closed, and the circuit is assumed to be in a steady-state condition. At the instant the switch is opened, what will be the rate of current change and the power delivered by the magnetic field.An iron core 0.4 m long and 5 cm2is wound with 300 turns. When a current of 0.5A flows in the coil, how much is the inductance of the coil. Assume the core has a permeability of 2500.
- Two identical coils A and B having 1000 turns and wound on a common magnetic core. 60% of the flux of each coil is linked with the other coil. A current of 5A in coil A produced a flux of 0.05x10-3 Wb. If the current in coil A changed from +6A to -6A in 0.01 sec, determine the induced EMF in coil B. Also determinine the self inductance of each coil and their mutual inductance.A toroidal coil, with a circular cross-sectional area of 0.2m2. The coil inductance is 0.28H. The coil has 500 turns. How much current should flow in the coil to get a flux linkage of 498? a. 498.000 A b. 140.000 A c. 1778.571 A d. 249000.000 A e. 889285.714 ATwo coils, A and B having 1200 and 800 turns respectively are placed near to each other.60 % of flux of each coil linked with the other coil. A current of 5A in coil A produces a flux of 0.25 mWb while the same current in coil B produces a flux of 0.15 mWb. Determine (a) mutual inductance and (ii) coupling coefficient.