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A uniform magnetic field of 1.5 T exists in a cylindrical region of radius10.0 cm, its direction parallel to the axis along east to west. A wire carrying current of 7.0 A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire if,(i) the wire intersects the axis,(ii) the wire is turned from N-S to northeast-northwest direction,(iii) the wire in the N-S direction is lowered from the axis by a distance of 6.0

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A uniform magnetic field of 3000 G is established along the positive z-direction. A rectangular loop of sides 10 cm and 5 cm carries a current of 12 A. What is the torque on the loop in the different cases shown in Fig. What is the force on each case? Which case corresponds to stable

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the(i) total torque on the coil,(ii) total force on the coil,m2(iii) average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10–5 , and the free electron density in copper is given to be about 1029

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A solenoid 60 cm long and of radius 4.0 cm has 3 layers of windings of 300 turns each. A 2.0 cm long wire of mass 2.5 g lies inside the solenoid (near its centre) normal to its axis; both the wire and the axis of the solenoid are in the horizontal plane. The wire is connected through two leads parallel to the axis of the solenoid to an external battery which supplies a current of 6.0 A in the wire. What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A galvanometer coil has a resistance of 12 Ω and the metre shows full scale deflection for a current of 3 mA. How will you convert the metre into a voltmeter of range 0 to 18

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A galvanometer coil has a resistance of 15 Ω and the metre shows full scale deflection for a current of 4 mA. How will you convert the metre into an ammeter of range 0 to 6

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field B = `B_0

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Biot-Savart law indicates that the moving electrons (velocity v) produce a magnetic field B such

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A current carrying circular loop of radius R is placed in the x-y plane with centre at the origin. Half of the loop with x > 0 is now bent so that it now lies in the y-z

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An electron is projected with uniform velocity along the axis of a current carrying long solenoid. Which of the following is

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In a cyclotron, a charged

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A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field B. The work done to rotate the loop by 30° about an axis perpendicular to its plane

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The gyro-magnetic ratio of an electron in an H-atom, according to Bohr model,

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Consider a wire carrying a steady current, I placed in a uniform magnetic field B perpendicular to its length. Consider the charges inside the wire. It is known that magnetic forces do no work. This implies

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two identical current carrying coaxial loops, carry current I in an opposite sense. A simple amperian loop passes through both of them once. Calling the loop as

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A cubical region of space is filled with some uniform electric and magnetic fields. An electron enters the cube across one of its faces with velocity v and a positron enters via opposite face with velocity- v. At this

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A charged particle would continue to move with a constant velocityin a region

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Verify that the cyclotron frequency ω = eB/m has the correct dimensions of

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Show that a force that does no work must be a velocity dependent

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The magnetic force depends on v which depends on the inertial frame of reference. Does then the magnetic force differ from inertial frame to frame? Is it reasonable that the net acceleration has a different value in different frames of

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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