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WorksheetsEC8451 EMF - UNIT - II (ELECTROSTATICS)
Total questions: 30
Worksheet time: 30mins
Coulomb is the unit of which quantity?
Field strength
Charge
Permittivity
Force
Coulomb law is employed in
Electrostatics
Magnetostatics
Electromagnetics
Maxwell theory
Find the force between 2C and -1C separated by a distance 1m in air(in newton).
18 X 106
-18 X 106
18 X 10-6
-18 X 10-6
Two charges 1C and -4C exists in air. What is the direction of force?
Away from 1C
Away from -4C
From 1C to -4C
From -4C to 1C
The Coulomb law is an implication of which law?
Ampere law
Gauss law
Biot Savart law
Lenz law
The electric field intensity is defined as
Force per unit charge
Force on a test charge
Force per unit charge on a test charge
Product of force and charge
Find the force on a charge 2C in a field 1V/m.
0
1
2
3
Find the electric field intensity of two charges 2C and -1C separated by a distance 1m in air.
18 X 109
9 X 109
36 X 109
-18 X 109
What is the electric field intensity at a distance of 20cm from a charge 2 X 10-6 C in vacuum?
250,000
350,000
450,000
550,000
Electric field intensity due to infinite sheet of charge σ is
Zero
Unity
σ/ε
σ/2ε
For a test charge placed at infinity, the electric field will be
Unity
+∞
Zero
-∞
In electromagnetic waves, the electric field will be perpendicular to which of the following?
Magnetic field intensity
Wave propagation
Both H and wave direction
It propagates independently
The lines of force are said to be
Real
Imaginary
Drawn to trace the direction
Not significant
Electric flux density in electric field is referred to as
Number of flux lines
Ratio of flux lines crossing a surface and the surface area
Direction of flux at a point
Flux lines per unit area
The electric flux density is the
Product of permittivity and electric field intensity
Product of number of flux lines and permittivity
Product of permeability and electric field intensity
Product of number of flux lines and permeability
Which of the following correctly states Gauss law?
Electric flux is equal to charge
Electric flux per unit volume is equal to charge
Electric field is equal to charge density
Electric flux per unit volume is equal to volume charge density
The Gaussian surface is
Real boundary
Imaginary surface
Tangential
Normal
A point charge 2nC is located at origin. What is the potential at (1,0,0)?
12
14
16
18
Find the potential of V = 60sin θ/r2 at P(3,60,25)
5.774
6.774
7.774
8.774
The potential difference in an open circuit is
Zero
Unity
Infinity
Circuit does not exist open
The potential taken between two points across a resistor will be
Positive
Negative
Zero
Infinity
Divergence theorem is based on
Gauss law
Stoke’s law
Ampere law
Lenz law
The Gaussian surface for a line charge will be
Sphere
Cylinder
Cube
Cuboid
The Gaussian surface for a point charge will be
Cube
Cylinder
Sphere
Cuboid
Gauss law cannot be used to find which of the following quantity?
Electric field intensity
Electric flux density
Charge
Permittivity
Gauss law for magnetic fields is given by
Div(E) = 0
Div(B) = 0
Div(H) = 0
Div(D) = 0
The electric flux density and electric field intensity have which of the following relation?
Linear
Nonlinear
Inversely linear
Inversely nonlinear
Choose the best definition of a dipole.
A pair of equal and like charges located at the origin
A pair of unequal and like charges located at the origin
A pair of equal and unlike charges separated by a small distance
A pair of unequal and unlike charges separated by a small distance
The potential due to a dipole at a point P from it is the
Sum of potentials at the charges
Difference of potentials at the charges
Multiplication of potentials at the charges
Ratio of potentials at the charges
The electrostatic energy in an electric field does not depend on which of the following?
Magnitude of charges
Permittivity
Applied electric field
Flux lines
