Electromagnetic Fields Objective Questions – Set 4

The electrical field strength at a distance point A due to a point charge +q, located at the origin, is 100 &mul v/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose centre is at origin, A, outside the sphere, becomes

The electric flux is given D = (2y² + z) I_x + 4xy I_y + x 1_z C/m². The volume charge density at point (-1,0,3) is

A sphere of radius with a uniform charge density ρv C/m³ shall have electric flux density at the radius r = a equal to

What is the value of skin depth as 100 Hz in a material having μ_r = 1.0 and & σ = 3.60 × 10₇ s/m

The frequency of the power wave associated with an electromagnetic wave having field as E = e^{-z/δ cos(ω - zδ)} is given by

A circular ring carrying uniformly distributed charge q and a point charge – Q on the axis of the ring. The magnitude of dipolement of the charge system is (Assume distance between centre of ring and point charge is d and radius of ring R)

A sphere of zoo radius contains electrical charge of density 2/(r sinθ) c/m³. What is the total charge contained within the sphere?

In a lossless medium the intrinsic impedance η 60π and μ_r = 1. The relative dielectric constant ε_r shall be

If n is the polarization vector and k is the direction of propagation plane electromagnetic wave, them

In a dielectric material an applied field in x direction E_x = 5 v/m gives a polarization of p_x = 3/10π u_x nc/m2. The susceptibility of the material is

The work done by a force = 4u_n - 3u_y + 2u_z N in giving a inc charge a displacement of (10 u_x + 2u_y - 7u_z) m is

A plane wave in a homogeneous medium has E = 50 sin(10⁸t + 2z) uy V/m. What is the direction of wave propagation

A potential field is given by V = 3x² y – yz. The electric field at P(2, -1, 4) is

Between a hollow and solid metal sphere, charge reside

Skin depth is proportional to

If in a 1 mF capacitor, an instantaneous displacement current of 1 A is to be established in the spaces between its plates then it is possible by

A dipole having a moment p – 3u_x - 5u_y + 10u_z ncm is located at p(1,2,-4) in free space. The V as Q(2,3,4) is

Which of the following statement are incorrect?

Which statement does not say that electrostatic field conservative?

A plane wave magnetic field is represented by B_x = cos(y – ct). The electric and magnetic fields will be zero in the direction

An electric field of 1.92 × 10³ N/c is maintained across two plates separated 0.015 m. Potential difference across plates will be

A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?

Two sphere of radius r₁ and r₂ are connected by a conducting wire. Each of the spheres has been given a charge Q. Now

A vector field A = p 1_n is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

An infinite non conducting sheet of charge has σ of 10^-7 c/m³. Equipotential surface for a potential of 10 volts is.

An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m² is

Gradient of scalar field is expressed as

Plane z = 10 m carries change 20 c/m². The electric field intensity at the origin is

In frec space E (z,t) = 10³ sin(ωt - βz) u_y v/m. What is the value of H (z,t)

If E is the electric field intensity, then what is the value of divergence of (curl of E)?