Recently Active Electricity And Magnetism Questions

1) *Image* The figure shows an inductor and Resistance connecdted in series across a battery of EMF=V. Choose the correct options. At time t=0, i) Potential drop across Inductor is 0. ii) Potential drop across Inductor is V. ...

*Image* ans is d ...

Q) Charges 2q, 2q, -4q are placed at the vertices of an equilateral triangle of side length a. Find the Dipole moment of the system. 1st tell me - where is the concept of dipoles coming? HCV writes that charges that are equal ...

What is the charge on the 2mF capacitor? *Image* ...

Q) A point charge q is placed at the origin. Calculate the electric flux through the open hemispherical surface : (x-a)^2+y^2+z^2=a^2 , x ≥ a. ...

even if dV=0 the work done may be non a zero value???(V represents volume ) plzzz explain this point ...

a resistor is formed in the shape of a hollow, quarter cylinder from a material of resistivity P. The length of cylinder is L, inner and outer radii are r1 and r2 respectively. the resistance of this resistor between the oute ...

*Image* my doubt since ∫dl=0 why net force is not 0? ...

*Image* source :BMAT2 ...

*Image* ...

Ques 1) Find the electric field vector at P (a,a,a) due to three infinitely long lines of charges along x,y and z - axes respectively. The charge density i.e is charge per unit length of each wire is @. *Image* Ques 2) A syst ...

two point charges q1 and q2 are fixed & placed distance s apart.Now slab(dielectric) of thickness t and relative permittivity E is inserted. Find force of b/w q1 and q2 ...

Statement 1: In a conductor of non- uniform cross-section, the current is same, though the drift velocity is different. Statement 2: In series current is same and for same current drift velocity is inversely proportional to c ...

Matrix match type. Two infinitely long line charges L1 & L2 are placed symmetric to x-axis as shown. Match the foll. for directions of electric field at point P on the x-axis. *Image* Column-1 A)Both L1 & L2 are +ve. B)Both L ...

*Image* Distance b/w A & B is l Rate of area swept by the conducting element = dA/dt = V l TRUE / FALSE ...

The walls of a closed cubical box of edge 50 cm are made of a material of thickness 1 mm and thermal conductivity 4 * 10^-4 cal per sec per cm per °C. The interior of the box maintained at 100°C above the outside temperatur ...

In a certain region of space, the potential field depends on x & y coordinates as- V =(x2+y2) . Represent graphically the electric field lines in the corresponding x-y plane. ...

*Image* ...

What is the use of heavy resistance R2??? Please rply....quite urgent... *Image* ...

if a charged particle is projected with velocity v in a region o f electric and mag fields, v, E and B perpendicular to each other...what will happen f E is switched off for some time and then again switched on??? ...

Q1,2 *Image* Q3 *Image* ...

A magnetic dipole with moment \vec{\mu } rotates abt its axis whose Moment of Inertia is given as I, with a const. angular velocity \vec{\omega } . A const. magnetic field \vec{B_0 } is siwtched on at t=0. Magnetic field vect ...

A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of electric fields with direction exist along its path as shown in figure *Image* charge on disc=Q 1)Find velocity of disc aft ...

(Q) an electric filed E0i exits in a region nd a sphere of radius r is kept along the eletric field. V represents the potential, then which is one is correct 1. \frac{\partial }{\partial x} V is constant inside the sphere and ...

In the arrengement shown here , one end of the spring just touches the surface of mercury contained in a metalic vessel,if the key is pressed on. *Image* (1)the spring stretches,attains equilibriunm (2)the spring compresses,a ...

A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of magnetic and electric fields with direction exist along its path as shown in figure *Image* 1)Find velocity of disc after v ...

A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of magnetic fields with direction exist along its path as shown in figure *Image* CHARGE ON DISC=Q 1)Find velocity of disc aft ...

*Image* ...

2 circular loops of equal radii are placed coaxially at some separation. The first is cut and a battery is inserted to drive a curent in it . The current changes slightly due to the variation in resistance with temperature. D ...

A metallic disc of radius r can rotate freely inside a long solenoid (ideal), abt a metallic shaft which runs parallel to the axis of the solenoid and is perp to the plane of the disc and passes through its centre.. Total res ...