Recently Active Electricity And Magnetism Questions

Figure (i) shows a conducting loop being pulled out of a magnetic field with a speed v. Which of the four plots shows in figure (ii) may represent the power delivered by the pulling agent as a function of the speed v *Image* ...

Two identical circular loops of metal wire are lying on a table without touching each other. Loop A carries a current which increases with time. In response the loop B ...

An inductor coil stores energy U when a current i is passed through it and dissipates energy at the rate of P. The time constant of the circuit when this coil is connected across a battery of zero internal resistance is ...

An LR circuit with a battery is connected at t =0. Which of the following quantities is not zero just after the connection ? ...

The spokes of a wheel are made of metal and their lengths are of one metre. On rotating the wheel about its own axis in a uniform magnetic field of 5 × 10–5 Tesla normal to the plane of wheel, a potential difference of 3.1 ...

A rectangular loop with a sliding connector of length l = 1.0 m is situated in a uniform magnetic field B = 2T perpendicular to the plane of loop. Resistance of connector is r = 2W. Two resistance of 6W and 3W are connected a ...

A uniform but time-varying magnetic field B(t) exists in a circular region of radius a and is directed into the plane of the paper, as shown. The magnitude of the induced electric field at point P at a distance r from the cen ...

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 ...

Which of the following statement(s) is (are) correct? ...

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 ...

page-121 question22. reply asap! ...

Two long, parallel conductors carry currents i1=3.0 A and i2=3.0 A, both directed into the page, detemine the magnitude of the resultant magnetic field at point P. *Image* ...

In a series LCR circuit the frequency of the source is half of the resonance frequency. Then how can I comment about the nature of the circuit,,,like whether it is capacative or inductive or purely resistive?? ...

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 ...

An ammeter has resistance R0 and range I. What resistance should be connected in parallel with it to increase the range to nI ?? ...

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* ...

In an oil experiment,oil droplets of mass m and charge q are droped from a height h at intervals ∂t> ( 2*h)/g . This drops are collected on a large hollow sphere of radius R,through a small hole on the surface of the sph ...

A closed loop of cross sectional area 10-2 m2 which has inductance L= 10 mH and negligible resistance is placed in a time varying magnetic field.The figure shows the variation of B with time for the interval 4 sec.The field i ...

A sphere of radius r is charged to a potential V.What will be the outward pull per unit area of its surface? ...

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* ...

A large conducting plane has surface charge density 1.0*10-4 C/m2 . Find the electrosatic energy stored in a cubical volume of edge 1.0 cm in front of the plane. ...