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Two concentric coils each of radius equal to `2pi` cm are placed at right angles to each other. 3 Amp and 4 Amp are the currents flowing in each coil respectively. The magnetic field intensity at the centre of the coils will be ........................

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

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Two parallel long wires A and B carry currents I1 and I2 . (I2 < I1 ) when I1 and I2 are in the same direction the mag. field at a point mid way between the wires is 10 µT. If I2 is reversed, the field becomes `30 muT` . The ratio `I_1/ I_2` is

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

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Two parallel long straight conductors are placed at right angle to the meter scale at the 2 cm and 6 cm marks as shown in the figure. If they carry currents I and 3I respectively in the upward direction, then will produce zero magnetic field

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

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A long solenoid has 800 turns per meter length of solenoid. A current of 1.6 Amp flowsthrough it. The magnetic induction at the end of the solenoid on its axis is

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

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A solenoid of 1.5 meter length and 4 cm diameter possesses 10 turn per cm. A current of 5 Amp is flowing through it. The magnetci induction at axis inside the solenoid

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

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A straight wire of length 30 cm and mass 60 milligrawm lies in a direction `30^0` east of north. The earth's magnetic field at this site is horizontal and has a magnitude of 0.8 G. What current must be passed through the wire so that it may float in air ?

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

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A long horizontal wire 'A' carries a current of 50 Amp. It is rigidly fixed. Another small wire 'B' is placed just above and parallel to 'A'. The weight of wire-B per unit length is `75X10^(-3)` Newton/meter and carries a current of 25 Amp. Find the position of wire B from A so that wire B remains suspended due to magnetic repulsion. Also indicate the direction of current in B w.r.t. to

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

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A circular loop of radius R = 20 cm is placed in a uniform magnetic field B = 2 Tesla in xy - Plane as shown in figure. The loop carries a current I = 1 Amp in the direction shown in fig. Find the magnitude of torque acting on the

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

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The rectangular coil having 100 turns is turned in a uniform mag. field of `0.05/sqrt2hatj` as shown in the fig. The torque acting on the Loop is

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

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Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform mag. field and desoribe circular path of radius R1 and R2 respectively. The ratio of mass of X to that of Y is

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

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An electron having mass `9xx 10^(-31)` kg, charge `1.6xx 10^(-19) C` and moving with a velocity of 106 m/s enters a region where mag. field exists. If it describes a circle of radius 0.10 m, the intensity of magnetic field must be ................

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

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A proton and an particle are projected with the same kinetic energy at right angles to the uniform mag. field. Which one of the following statements will be

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A 2 Mev proton is moving perpendicular to a uniform magnetic field of 2.5 tesla. The force on the proton

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A proton is projected with a speed of `2 xx10^6 m/s` at an angle of `60^0` to the X-axis. If a uniform mag. field of 0.104 tesla is applied along Y-axis, the path of proton is

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

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A charged particle moves in a uniform mag. field. The velocity of the particle at some instant makes an acute angle with the mag. field. The path of the particle will

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

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A, proton, a deuteron and `alpha`- an particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If `r_ p` , `r_d` and denote respectively the radii of trajectories of these particles,

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

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Two particles A and B of masses `m_A` and `m_B` respectively and having the same charge are moving in a plane. A uniform mag. field exists perpendicular to this plane. The speeds of the particles are `V_A` and `V_B` respectively and the trajectories are as shown in the figure,

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

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An electron and a proton with equal momentum enter perpendicularly into a uniform magnetic

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

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A current I, carrying wire AB is placed near an another long wire CD carrying current `I_2` As shown in Fig. If free to move, wire AB will

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

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A conducting rod of length ? [cross-section is shown] and mass m is moving down on a smooth inclined plane of inclination `theta` with constant speed `v` . A vertically upward mag. field `vecB` exists in upward direction. The magnitude of mag. field `vecB` is

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

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