Test: EMFT - Electronics and Communication Engineering (ECE) MCQ

Two infinitely long wires separated by a distance 5m, carry currents I in opposite direction as shown in the
figure. If I = 8A, then the magnetic field intensity at point p is?

A current loop ABCD is held fixed on the plane of the paper as shown. The Magnetic field H at point ‘O’
will be ____?

If A vector is solenoidal, which of these is true?

There is a region in which an

The path followed by the charge particle will be____?

Which one of the following potentials does NOT satisfy Laplace’s Equation?

For the scalar field
 , the magnitude of the gradiant at the point (1, 3) is?

Given Scalar function f = xy + yz + zx. Find the Directional Derivative of ‘f’ at point (1, 2, 3) along the
vector

Which one of the following vector function has divergence & curl both zero.

Which of the following vector can be expressed as curl of another vector

The expression for electric field in a space is  Find the potential difference between point A (1, -2, 1) m and point B (2, 1, -2) m

Find the potential difference V_AB between A (2, 1, 0)m & B (0, 2, 4)m in an electric field

 in volts.

(Important - Enter the numerical value only in the answers)

The force of attraction between the plate of parallel capacitor having charge q is____?

Four capacitors of each of capacity 3μF are connected as shown in the adjoining figure. The ratio of equivalent capacitance between A and B and between A and C will be :

The current density in a cylindrical wire of radius 16mm placed along the z-axis is . What will be the total current (in Ampere) flowing through the wire.

Two extensive homogeneous isotropic dielectrics meet on a plane z = 0. For z > 0,  = 4 and
for z < 0,  = 2. A uniform electric field exists at z > 0 as . What is the value of electric field in the region z < 0

Find the voltage across the dielectric slab of dielectric constant  when the voltage across the plate is 200V.

A Parallel plate capacitor is made of two circular plates separated by a distance of 5mm with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3×104 V/m, the charge density of the positive plate will be?

Consider the following diagram

The electric field E at a point P due to the Presence of dipole as shown in the above diagram (r >> d) is proportional to

The potantial field V= 2/xyz  Valt. The vector form of  at point (1, 1, 1) will be?

Consider the charge configuration and spherical gaussian surface as shown in the fig. When calculating the flux of the electric field oven the spherical gaussian surface will be due to the

The electric potantial inside a charged spherical ball is given by v = ar² + b, when r is the radial distance from centre a and b are constant. Then the charge density inside the ball will be?

Two infinite sheet carry a charge density -4μ c/m² & + 4μ c/m² lies on y = +4 & y = -4 plane respectively. Find the electric field intensity in region defined by -4 < y < +4