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SSC JE: Magnetic Circuits Quiz 5
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Question 1
The flux density B in a core having relative permeability µr and l length l meters when I amperes of current flows in its N-turn winding is
Question 2
The magnetic intensity in the air core of the solenoid shown in Fig. 8.21 is changed by 20 AT /m, 5y what amount the flux density in the core is changed?
Question 3
Ferromagnetic materials exhibit hysteresis when
Question 4
The slope of B-H curve of a material gives its
Question 5
Determine the magnetic field strength (in A-turns/m) when the intensity of magnetization of the material is 0.078 A-turns/meter and the magnetic susceptibility of the material is 0.0013.
Question 6
What will be the current (in A) through a solenoid, when the solenoid has 160 turns and produces an mmf of 32 Amp-turns?
Question 7
What will be the permeance (in H) of a coil, when the flux through the coil is 50 Wb and the value of produced mmf is 25 Amp-turns?
Question 8
What will be value of magnetic field (in mT) at the centre of a 7 m long coil, when the coil has 230 turns and carrying a current of 3 A?
Question 9
Two parallel conductors carrying 200A of current and conductors are separated by 40mm. find the force per meter on each conductor –
Question 10
A point pole has a strength of . Then calculate the force on a point pole of placed at 20 cm from it will be–
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