Recent questions in 12th Physics

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

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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

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

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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

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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

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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

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

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

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

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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

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Describe the motion of a charged particle in a cyclotron if the frequency of the radio frequency (rf) field were

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Two long wires carrying current I1 and I2 are arranged as shown in Fig. The one carrying current I1 is along is the x-axis. The other carrying current I2 is along a line parallel to the y-axis given by x = 0 and z = d. Find the force exerted at O2 because of the wire along the x-axis.

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A current carrying loop consists of 3 identical quarter circles of radius R, lying in the positive quadrants of the x-y, y-z and z-x planes with their centres at the origin, joined together. Find the direction and magnitude of B at the

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A charged particle of charge e and mass m is moving in an electric field E and magnetic field B. Construct dimensionless quantities and quantities of dimension [T

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An electron enters with a velocity v = v0i into a cubical region (faces parallel to coordinate planes) in which there are uniform electric and magnetic fields. The orbit of the electron is found to spiral down inside the cube in plane parallel to the x-y plane. Suggest a configuration of fields E and B that can lead to

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Do magnetic forces obey Newton’s third law. Verify for two current elements`dl_1 = dl hatj ` located at the origin and `dl_2 = dl hatj ` located at (0, R, 0). Both carry current

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A multirange voltmeter can be constructed by using a galvanometer circuit as shown in Fig. We want to construct a voltmeter that can measure 2V, 20V and 200V using a galvanometer of resistance 10Ω and that produces maximum deflection for current of 1 mA. Find R1, R2 and R3 that have to be

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

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