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A current `I` flows through a long straight conductor which is bent into a circular loop of radius R in the middle as shown in the figure.The magnitude of the net magnetic field at point `O` will

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

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A current of 10A is flowing from east to west in a long straight wire kept on a horizontal table. The magnetic field developed at a distance of 10 cm due north on the table

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

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Magnetic field due to a ring having `n` turns at a distance `x` on its axis is proportional to (if, `r` = radius of

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

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A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field B with the distance d from the centre of the conductor, is correctly represented by the

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

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The magnitude of the magnetic field inside a long solenoid is increased

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A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns/cm is halved, the new value of the magnetic field

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

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The variation of magnetic field with distance d from centre of current carrying solenoid is best represented

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Toroid

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

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A toroid having 200 turns carries a current of 1A. The average radius of the toroid is 10 cm. The magnetic field at any point in the open space inside the toroid

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

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Two toroids 1 and 2 have total number of turns 200 and 100 respectively with average radii 40 cm and 20 cm, respectively. If they carry same current `i`, the ratio of the magnetic fields along the two loops

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

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The current in the windings on a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field is 1.0 T, the relative permeability is near

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Time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent

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Which of the following diagram is correct for the direction of magnetic force on a charge moving in a uniform magnetic

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Two particles of masses `m_a & m_b` and same charge are projected in a perpendicular magnetic field. They travel along circular paths of radius `r_a and r_b` such that `r_a > r_b`. Then, which is

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

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A charge particle after being accelerated through a potential difference `V` enters in a uniform magnetic field and moves in a circle of radius `r`. If `V` is doubled, the radius of the circle will

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

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If the velocity of charged particle has both perpendicular and parallel components while moving through a magnetic field, what is the path followed by a charged

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

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A beam of protons with a velocity of `4 xx 10^5 m s^(-1)` moves in the direction of uniform magnetic field. It makes an angle of 37° with the magnetic field and follows a helical path. If the time period of helix is `2 xx 10^(-7) s`, then its pitch will

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Lorentz force can be correctly expressed by the

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A proton beam passes without deviation through a region of space. This space has uniform transverse mutually perpendicular electric and magnetic fields with `E=220 kV'/'m and B = 50 mT`. The velocity of the beam

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Two parallel wires carrying currents in the same direction attract each other because

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