An iron rod 0.2 m long, 10 mm in diameter and of permeability 1000 is placed inside a long soleniod wound with 300 turns per meter. If a current of 0.5 ampere is passed through the rod, find the magnetic moment of the rod.
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An insulated wire is wound so that it forms a flat coil with N=100 turns. The radius of the innermost turns is `R_(1)=4 cm` . What magnetic moment wil
Correct Answer - `m=(1)/(3)piNI(R_(1)^(2)+R_(1)R_(2)+R_(2)^(2))=2.2 xx 10^(-3)A m^(2)`
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A toroid of total 1000 turns is made by using a tore of average radius 25cm. What is the magnetic induction inside the tore if a current of2A is passe
Correct Answer - `[16 xx 10^(-2)T]`
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A flat circular coil with 10 turns of wire on it has a diameter 20mm and carries a current 0.5A. It is mounted inside a long solenoid that has 200 tur
Correct Answer - `[3.78 xx 10^(-6)Nm]`
2 Answers 1 views
A Rowland ring of mean radius 15 cm has 4500 turns of wire wound on a ferromagnetic core of relative permeability 800. Find the magnitnde of the magne
Correct Answer - [5.76 T]
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An iron ring of mean circumferential length 30 cm and cross-section 1 `cm^(2)` is wound uniformly with 300 turns of wire . When a current of `0.032` A
Correct Answer - `2xx10^(-3)WB m^(-2), 30 A "turns" m^(-1), 500`
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A material core has 10 turns per cm of wire wound uniformly upon it which carries a current of 2.0 A. The flux density in the material is 1.0 `WB m^(-
Correct Answer - 2000 turns `m^(-1) , 7.9 xx 10^(5) "A turns" m^(-1), 397`
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An iron ring having 500 turns of wire and mean diameter of 12 cm carries a current of 0.3 A. The relative permeability of iron is 600. What is the mag
Correct Answer - `0.3 Wbm^(-1) 397.9 A "turns" m^(-1), 0.2995 Wbm^(-2)`
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A long solenoid having 1000 turns per cm carries an alternating current of peak value 1 A. A search coil having a cross-sectional area of `1xx10^(-4)
Correct Answer - `15.8 s^(-1)`
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A long solcnoid of length 1m, cross-sectional area `10cm^(2)`, having 1000 turns has wound about its centre a small coil of 20 turns. Compute the mutu
Correct Answer - `25I mu V`
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A solenoid 1.0 m long and 0.05 m in diameter, has 700 turns. Another solenoid of 50 turns is tightly wound over the first solenoid. Find (i) the mutua
Correct Answer - `0.86muH,4.3xx10^(-4)`V
2 Answers 1 views