Frequent Magnetism Questions

A parallel plate capacitor of area 60cm^2 and separation 3mm is charged initially at 90 micro coulomb. If the medium between the plates get slightly conducting and the plate loses charge initially at the rate of 2.5 *10^-8 C ...

infinite number of straight wires each carrying current i are equally placed as shown in the fig. adjacent wires have curent in opposite direction. net magnetic field at point p is *Image* a. μi ln2/4π 3 a k b. μi ln4/4π ...

1.Determine the magnetic field at the centre of the current carrying wire arrangement shown in the figure. the arrangement extends to infinity. the wires joining the successive squares are along the line passing through the c ...

What is the magnitude of magnetic field at centre O of loop of radius √2 m made of uniform wire when a current of 1 A enters in the loop and taken out of it by two long wire as shown ...

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Assertion: A charge particle is moving in a circle with constant speed in uniform magnetic field. If we increase the speed of the particle to twice, its acceleration will became four times. Reason: In circular path of radius ...

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Please verify whether A and D are r8 option? *Image* ...

For a positively charged particle moving in a x-y plane initially along the x-axis, there is a sudden change in its path due to the presence of electric and/or magnetic fields beyond P. The curved path is shown in the x-y pla ...

An electron moving with a speed u along the positive x-axis at y=0 enters a region of uniform magnetic field vec{B}=-{{B}_{o}}hat{k} which exists to the right of y-axis. The electron exits from the region after some time with ...

A current carrying loop is placed in a uniform magnetic field in four different orientations, I, II, III and IV, arrange them in the decreasing order of potential energy *Image* ...

Two identical circular loops of metal wire are lying on a table. Loop A carries a current which increases with time. In response, the loop B ...

A pair of stationary and infinitely long bent wires are placed in the XY plane as shown in the figure. The wire carrying a current of 1.0 ampere each as shown. The segments L and M are along X- axis, the segments P and Q are ...

Magnetic fields at two points on the axis of a circular coil at a distance of 0.05 m and 0.2m from the centre are in the ratio 8 : 1. The radius of the coil is ...

A proton, a deuteron and an alpha - particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If {{r}_{p}},,,{{r}_{d}} and {{r}_{alpha }} denote respectively the radii of the tr ...

A non-planar loop of conducting wire carrying a current i is placed as shown in the figure. Each of the straight sections of the loop is of length 2a. The magnetic field due to this loop at the point P (a, 0, a) points in the ...

A long straight wire along the z-axis carries a current i in the negative z direction. The magnetic vector field vec{B} at a point having coordinates (x, y) in the z = 0 plane is ...

Two infinitely long insulated wires are kept perpendicular to each other. They carry currents i1 = 2 A. and i2 = 1.5 A. Find the direction and magnitude of magnetic field produced at P *Image* ...

A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil w ...

Find Magnetic field at point O *Image* ...

The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54,,mu T . What will be its value at the centre of the loop ...

Find Magnetic field at point O *Image* ...

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