Download ELECTROSTATICS-1 1) The First law in electro statics to find the

ELECTROSTATICS-1
1) The First law in electro statics to find the force of a point charge is……………
A) Coulomb’s law
B) Gauss’s law
C) Divergence theorem
D) Stoke’s theorem
2) Coulomb’s law states that the F between two point charges is……………………
A) Along the line joining them.
B) Directly proportional to the Product Q1 and Q2 of the charges.
C) Inversely proportional to the square of the distance between them.
D) All the above.
3) The proportionality constant k=………….
A) 9x109 m/F
B) 36π/10-9 F/m
C) Both A and B
D) None
4) The force between two point charges, F is…………field
A) Scalar
B) vector
C) Both a and b
D) None
5) The force per unit charge is called………….
A) Electric field intensity B) Electric field strength
C) Both a and b
D) None
6) The Electric field, E due to a point charge is given by
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16) The Electric potential is vector quantity.
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17) The relation between E and v is
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A)
B)
C)
D)
7) The Electric field, E due to a Line charge is given by
A)
B)
C)
D)
8) The Electric field, E due to a Surface charge is given by
A)
B)
C)
D)
9) The Electric field, E due to a Volume charge is given by
A)
B)
C)
D)
10) The Electric flux density, D is ………….
A) Dependent of medium
B) Independent of medium
C) Both a and b
D) None
FILL IN THE BLANKS
11) The Electric Field due to an infinite line charge placed on z-axis is given by…………………..
12) The Electric Field due to an infinite surface charge is given by…………………..
13) The Electric Field due to an infinite volume charge is given by…………………..
14) The Maxwell’s 1st equation for electrostatic field is given by…………………..
15) The Maxwell’s 2nd equation for electrostatic field is given by…………………..
TRUE OR FALSE
18)
 
Q   D  dS
is called the Gauss’s law.
S
19)
is the potential due to a surface charge at a distance r
20) Stoke’s theorem relates closed line and open surface whereas Divergence
theorem relates closed surface and volume.
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K.RAVEENDRA, M.Tech., MISTE.,MISOI * Associate Professor & I/C Examination Cell* S V ENGINEERING COLLEGE FOR WOMEN
ELECTROSTATICS-2
1) Conductors are also called as…….
a) Insulators
b) Dielectrics
c) Metals
d) Both a & b
2) Non-Conductors are also called as…….
a) Insulators
b) Dielectrics
c) Metals
d) Both a & b
3) The materials having σ<<1 are called……
a) Conductors
b) Non-Conductors
c) Both a & b
d) None
4) The materials having σ>>1 are called……
a) Conductors
b) Non-Conductors
c) Both a & b
d) None
5) The following are the two fundamental quantities in Electric Fields
a) Voltage
b) Current
c) Both a & b
d) None
6) Current is ……quantity
a) Scalar
b) Vector
c) Both a & b
d) None
7) The following are the types of current densities that can exist
a) Convection
b) Conduction
c) Displacement
d) All the above
8) If D varies linearly with E, the medium is called…….
a) Linear
b) Isotropic
c) Homogenious
d) None
9) If D and E are in same direction, the medium is called…
a) Linear
b) Isotropic
c) Homogenious
d) None
10) If σ is same for D and E in region, the medium is called…
a) Linear
b) Isotropic
c) Homogenious
d) None
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11) There must be at least 3 conductors to have the Capacitance.
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12) To have the capacitance, The conductors must have the same amount of charge.
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13) For Dielectric-Dielectric region, the tangential component of E1 is continuous
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14) For Dielectric-Dielectric region, the tangential component of D1 is continuous
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15) Within a perfect conductor, The E Field inside the conductor is Zero.
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TRUE OR FALSE
K.RAVEENDRA, M.Tech., MISTE.,MISOI * Associate Professor & I/C Examination Cell* S V ENGINEERING COLLEGE FOR WOMEN
FILL IN THE BLANKS
16) The formula for capacitance of a parallel plate capacitor is……………..
17) The formula for capacitance of a Co-axial capacitor is……………..
18) The formula for capacitance of a Spherical capacitor is……………..
19) The Poisson’s equation is given by………………
20) The Continuity of current equation is given by………………
V

V
.J  
t
 2V  
MAGNETOSTATICS
1) The source for Magnetic field is……..
a) current
c) Both a&b
2) Biot-Savart’s Law is similar to
a) Ampere’s law.
c) Couloumb’s law.
3) Ampere’s Law is similar to
a) Biot-Savart’s law.
c) Couloumb’s law.
4) The direction of H can be determined using…..rule.
a) Right handed thumb
c)
Both a & b
5)
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b) Gauss’s law.
d) Lorentz law.
b) Right handed screw
d) None
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a) Biot-Savart’s law.
b) Gauss’s law.
c) Couloumb’s law.
d) Ampere’s law.
6) For a co-axial cable, the magnetic field out side the cable is…………
a) Infinity
b) Zero
c)
Unity
d) uniform
7)The magnetic flux through any closed surface is…………
a) Infinity
b) Zero
c) Unity
d) uniform
8) The units for inductance are………
a) Henrys.
b) Weber / ampere
c)
Both a & b.
d) None.
9) The Electrostatic energy is given by……..
a) WE = 1/2 CV2
b)
c)
c)
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b) Gauss’s law.
d) Lorentz law.
Is ……….law
Is ……….law
10) The Magnetostatic energy is given by……..
a) WEM = 1/2 LI2
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b) Moving charges with constant velocity
d) None.
d)
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All the above
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b)
d) All the above
TRUE OR FALSE
K.RAVEENDRA, M.Tech., MISTE.,MISOI * Associate Professor & I/C Examination Cell* S V ENGINEERING COLLEGE FOR WOMEN
11) Isolated magnetic charge cannot exists.
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12) Isolated electric charge cannot exists.
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13) The magnetic scalar potential is not similar to the electric potential.
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14) The units of vector magnetic potential, A are webers /meter.
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15) Magnetic fields cannot exhibits the force.
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FILL IN THE BLANKS
16) The formula for Magnetic Field intensity due to an infinite current element is ……………..
17) Maxwell’s first equation for static fields is given by………………
18) Maxwell’s second equation for static fields is given by………………
19) Maxwell’s third equation for static fields is given by………….
20) Maxwell’s fourth equation for static fields is given by………………
K.RAVEENDRA, M.Tech., MISTE.,MISOI * Associate Professor & I/C Examination Cell* S V ENGINEERING COLLEGE FOR WOMEN