Recently Active Electricity And Magnetism Questions

Assertion: In series L-C-R circuit, voltage will lead the current function for frequency greater than the resonance frequency. Reason: At resonance frequency, phase difference between current function and voltage function is ...

Assertion: A small electric dipole is moved translationally from higher potential to lower potential in uniform electric field. Work done by electric field is positive. Reason: When a positive charge moved from higher to lowe ...

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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A particle of mass m and charge q moves at a high speed along the x-axis.It is initially near x = -∞ and it ends up near x = +∞. A second charge Q is fixed at the point x=0,y = -d.As the moving charge passes the stationar ...

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

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A wire of resistance ' R ' and length ' L ' is connected to a d.c. source of emf V through a switch ' S ' *Image* At t = 0, the switch ' S ' is closed and at the same time an external agent starts stretching the wire such tha ...

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*Image* what is the resistance between A and B in the network shown..?? ...

A sphere of radius 1 cm has potential of 8000 V, then energy density near its surface will be__64 X 105 J/m3__8 X 103 J/m3__32 J/m3__2.83 J/m3 ...

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*Image* Ans) is -12 v/m bt it shld be 12 v/m na...?? ...

A square loop of side length ' a ' , mass ' m ' and Resistance ' R ' enters a uniform magnetic field (B=B0 (-k)) with velocity ' v° ' at t = 0 sec Plot the variation of ' v ' with the distance from O ( Assume that ' v ' is e ...

A free point charge q and mass m is at rest at the origin .A constant electric field E = E0(i^- j^) and constant magnetic field B = -B k^ is present in whole region .When this charge reaches at position (2,20) its speed be ∠...

A steady current I flows through a wire of resistivity ρ, length L and radius r. The current produces heat in the wire. The rate of heat loss in the wire is proportional to its surface area. The steady temperature of the wir ...

The long straight wire carrying a constant current 'i' is placed distance 'd' above a metal bar of length 'l' which is moving at constant velocity V in the horizontal direction .Calculate the E.M.F induced in the bar? ...

What is the time constant for the circuit..how to calculate? ...

A small bar magnet is being slowly insterted with cons velocity inside a solenoid as shown.Which graph best represents the relationship between emf induced with time..plz post answer with explanation ...

A metallic ball is suspended by an insulated string, in an uniform electric field. A X-Ray of high radiation is passed through the ball in the field. What will happen to the ball? ...

Sir, please answer this with reason- A conducting ring of radius 1m is placed in a uniform magnetic field of 0.01T oscillating with frequency 100 Hz with its plane at right angles to B. What will be the induced electric field ...