Which of the following is not true? a) A . (B . C) = scalar value b) A . (B x C) = scalar value c) A x (B . C) = scalar value d) A x (B x C) = vector value

Which of the following is not true?
a) A . (B . C) = scalar value b) A . (B x C) = scalar value
c) A x (B . C) = scalar value d) A x (B x C) = vector value
by

1 Answer

Answer :

c) A x (B . C) = scalar value
by

Related questions

The curl of a curl of a vector gives a a) Scalar b) Vector c) Zero value d) Non zero value

Description : The curl of a curl of a vector gives a a) Scalar b) Vector c) Zero value d) Non zero value

Last Answer : b) Vector

The magnetic vector potential is a scalar quantity. a) True b) False

Description : The magnetic vector potential is a scalar quantity. a) True b) False

Last Answer : b) False

The divergence of a vector is a scalar. State True/False. a) True b) False

Description : The divergence of a vector is a scalar. State True/False. a) True b) False

Last Answer : a) True

The dot product of two vectors is a scalar. The cross product of two vectors is a vector. State True/False. a) True b) Fals

Description : The dot product of two vectors is a scalar. The cross product of two vectors is a vector. State True/False. a) True b) Fals

Last Answer : a) True

The scalar factor of Cartesian system is unity. State True/False. a) True b) False

Description : The scalar factor of Cartesian system is unity. State True/False. a) True b) False

Last Answer : a) True

The scalar factor of spherical coordinates is a) 1, r, r sin θ b) 1, r, r c) r, r, 1 d) r, 1, r

Description : The scalar factor of spherical coordinates is a) 1, r, r sin θ b) 1, r, r c) r, r, 1 d) r, 1, r

Last Answer : a) 1, r, r sin θ

Cylindrical systems have the following scalar values respectively a) 1, ρ ,1 b) 1, 1, 1 c) 0,1,0 d) 1,0,0

Description : Cylindrical systems have the following scalar values respectively a) 1, ρ ,1 b) 1, 1, 1 c) 0,1,0 d) 1,0,0

Last Answer : a) 1, ρ ,1

Find the Gauss value for a position vector in Cartesian system from the origin to one unit in three dimensions. a) 0 b) 3 c) -3 d) 1

Description : Find the Gauss value for a position vector in Cartesian system from the origin to one unit in three dimensions. a) 0 b) 3 c) -3 d) 1

Last Answer : b) 3

When a vector is irrotational, which condition holds good? a) Stoke’s theorem gives non-zero value b) Stoke’s theorem gives zero value c) Divergence theorem is invalid d) Divergence theorem is valid

Description : When a vector is irrotational, which condition holds good? a) Stoke’s theorem gives non-zero value b) Stoke’s theorem gives zero value c) Divergence theorem is invalid d) Divergence theorem is valid

Last Answer : b) Stoke’s theorem gives zero value

In homogeneous coordinates value of ‘h’ is consider as 1 & it is called….. a.Magnitude Vector b.Unit Vector c.Non-Zero Vector d.Non-Zero Scalar Factor

Description : In homogeneous coordinates value of ‘h’ is consider as 1 & it is called….. a.Magnitude Vector b.Unit Vector c.Non-Zero Vector d.Non-Zero Scalar Factor

Last Answer : d.Non-Zero Scalar Factor

Curl is defined as the angular velocity at every point of the vector field. State True/False. a) True b) False

Description : Curl is defined as the angular velocity at every point of the vector field. State True/False. a) True b) False

Last Answer : a) True

The curl of gradient of a vector is non-zero. State True or False. a) True b) False

Description : The curl of gradient of a vector is non-zero. State True or False. a) True b) False

Last Answer : b) False

The divergence of curl of a vector is zero. State True or False. a) True b) False

Description : The divergence of curl of a vector is zero. State True or False. a) True b) False

Last Answer : a) True

The vector product of two vectors is given by area of the parallelogram. State True/False. a) True b) False

Description : The vector product of two vectors is given by area of the parallelogram. State True/False. a) True b) False

Last Answer : a) True

Which is true:  a. Energy is a scalar quantity  b. Energy is a vector quantity  c. Energy is vector & scalar  d. None of the above

Description : Which is true:  a. Energy is a scalar quantity  b. Energy is a vector quantity  c. Energy is vector & scalar  d. None of the above

Last Answer : Energy is a scalar quantity

Find the magnetic field intensity when the magnetic vector potential x i + 2y j + 3z k. a) 6 b) -6 c) 0 d) 1

Description : Find the magnetic field intensity when the magnetic vector potential x i + 2y j + 3z k. a) 6 b) -6 c) 0 d) 1

Last Answer : b) -6

Find the magnetic flux density of the material with magnetic vector potential A = y i + z j + x k. a) i + j + k b) –i – j – k c) –i-j d) –i-k

Description : Find the magnetic flux density of the material with magnetic vector potential A = y i + z j + x k. a) i + j + k b) –i – j – k c) –i-j d) –i-k

Last Answer : b) –i – j – k

Find the divergence of the vector F= xe -x i + y j – xz k a) (1 – x)(1 + e -x ) b) (x – 1)(1 + e -x ) c) (1 – x)(1 – e) d) (x – 1)(1 – e)

Description : Find the divergence of the vector F= xe -x i + y j – xz k a) (1 – x)(1 + e -x ) b) (x – 1)(1 + e -x ) c) (1 – x)(1 – e) d) (x – 1)(1 – e)

Last Answer : a) (1 – x)(1 + e -x )

Transform the vector B=yi+(x+z)j located at point (-2,6,3) into cylindrical coordinates. a) (6.325,-71.57,3) b) (6.325,71.57,3) c) (6.325,73.57,3) d) (6.325,-73.57,3)

Description : Transform the vector B=yi+(x+z)j located at point (-2,6,3) into cylindrical coordinates. a) (6.325,-71.57,3) b) (6.325,71.57,3) c) (6.325,73.57,3) d) (6.325,-73.57,3)

Last Answer : a) (6.325,-71.57,3)

The spherical equivalent of the vector B = yi + (x + z)j located at (-2,6,3) is given by a) (7,64.62,71.57) b) (7,-64.62,-71.57) c) (7,-64.62,71.57) d) (7,64.62,-71.57)

Description : The spherical equivalent of the vector B = yi + (x + z)j located at (-2,6,3) is given by a) (7,64.62,71.57) b) (7,-64.62,-71.57) c) (7,-64.62,71.57) d) (7,64.62,-71.57)

Last Answer : d) (7,64.62,-71.57)

Identify the correct vector identity. a) i . i = j . j = k . k = 0 b) i X j = j X k = k X i = 1 c) Div (u X v) = v . Curl(u) – u . Curl(v) d) i . j = j . k = k . i = 1

Description : Identify the correct vector identity. a) i . i = j . j = k . k = 0 b) i X j = j X k = k X i = 1 c) Div (u X v) = v . Curl(u) – u . Curl(v) d) i . j = j . k = k . i = 1

Last Answer : c) Div (u X v) = v . Curl(u) – u . Curl(v)

As defined in physics, work is: w) a scalar quantity x) always a positive quantity y) a vector quantity z) always zero

Description : As defined in physics, work is: w) a scalar quantity x) always a positive quantity y) a vector quantity z) always zero

Last Answer : ANSWER: W -- A SCALAR QUANTITY

The Poynting vector is the power component that is calculated by the a) Product of E and H b) Ratio of E and H c) Dot product of E and H d) Cross product of E and H

Description : The Poynting vector is the power component that is calculated by the a) Product of E and H b) Ratio of E and H c) Dot product of E and H d) Cross product of E and H

Last Answer : d) Cross product of E and H

The vectors of the electromagnetic wave propagation can be expressed in a) Dot product b) Cross product c) Unit vector d) Perpendicular vector

Description : The vectors of the electromagnetic wave propagation can be expressed in a) Dot product b) Cross product c) Unit vector d) Perpendicular vector

Last Answer : b) Cross product

The gradient of the magnetic vector potential can be expressed as a) –με dV/dt b) +με dE/dt c) –με dA/dt d) +με dB/dt

Description : The gradient of the magnetic vector potential can be expressed as a) –με dV/dt b) +με dE/dt c) –με dA/dt d) +με dB/dt

Last Answer : a) –με dV/dt

The charge density of a field with a position vector as electric flux density is given by a) 0 b) 1 c) 2 d) 3

Description : The charge density of a field with a position vector as electric flux density is given by a) 0 b) 1 c) 2 d) 3

Last Answer : d) 3

The magnitude of the conduction current density for a magnetic field intensity of a vector yi + zj + xk will be a) 1.414 b) 1.732 c) -1.414 d) -1.732

Description : The magnitude of the conduction current density for a magnetic field intensity of a vector yi + zj + xk will be a) 1.414 b) 1.732 c) -1.414 d) -1.732

Last Answer : b) 1.732

The charge density of a system with the position vector as electric flux density is a) 0 b) 1 c) 2 d) 3

Description : The charge density of a system with the position vector as electric flux density is a) 0 b) 1 c) 2 d) 3

Last Answer : d) 3

Find the magnetic flux density when the vector potential is a position vector. a) 1 b) 0 c) -1 d) ∞

Description : Find the magnetic flux density when the vector potential is a position vector. a) 1 b) 0 c) -1 d) ∞

Last Answer : b) 0

Find the magnetic field when the magnetic vector potential is a unit vector. a) 1 b) -1 c) 0 d) 2

Description : Find the magnetic field when the magnetic vector potential is a unit vector. a) 1 b) -1 c) 0 d) 2

Last Answer : c) 0

The relation between flux density and vector potential is a) B = Curl(A) b) A = Curl(B) c) B = Div(A) d) A = Div(B)

Description : The relation between flux density and vector potential is a) B = Curl(A) b) A = Curl(B) c) B = Div(A) d) A = Div(B)

Last Answer : a) B = Curl(A)

The current element of the magnetic vector potential for a surface current will be a) J dS b) I dL c) K dS d) J dV

Description : The current element of the magnetic vector potential for a surface current will be a) J dS b) I dL c) K dS d) J dV

Last Answer : c) K dS

The magnetic vector potential for a line current will be inversely proportional to a) dL b) I c) J d) R

Description : The magnetic vector potential for a line current will be inversely proportional to a) dL b) I c) J d) R

Last Answer : d) R

The Laplacian of the magnetic vector potential will be a) –μ J b) – μ I c) –μ B d) –μ H

Description : The Laplacian of the magnetic vector potential will be a) –μ J b) – μ I c) –μ B d) –μ H

Last Answer : a) –μ J

Find the vector potential when the field intensity 60x 2 varies from (0,0,0) to (1,0,0). a) 120 b) -20 c) -180 d) 60

Description : Find the vector potential when the field intensity 60x 2 varies from (0,0,0) to (1,0,0). a) 120 b) -20 c) -180 d) 60

Last Answer : b) -20

Given the vector potential is 16 – 12sin y j. Find the field intensity at the origin. a) 28 b) 16 c) 12 d) 4

Description : Given the vector potential is 16 – 12sin y j. Find the field intensity at the origin. a) 28 b) 16 c) 12 d) 4

Last Answer : c) 12

Calculate the polarisation vector in air when the susceptibility is 5 and electric field is 12 units. a) 3 b) 2 c) 60 d) 2.4

Description : Calculate the polarisation vector in air when the susceptibility is 5 and electric field is 12 units. a) 3 b) 2 c) 60 d) 2.4

Last Answer : c) 60

Calculate the polarisation vector of the material which has 100 dipoles per unit volume in a volume of 2 units. a) 200 b) 50 c) 400 d) 0.02

Description : Calculate the polarisation vector of the material which has 100 dipoles per unit volume in a volume of 2 units. a) 200 b) 50 c) 400 d) 0.02

Last Answer : a) 200

Using volume integral, which quantity can be calculated? a) area of cube b) area of cuboid c) volume of cube d) distance of vector

Description : Using volume integral, which quantity can be calculated? a) area of cube b) area of cuboid c) volume of cube d) distance of vector

Last Answer : c) volume of cube

Find the curl of the vector A = yz i + 4xy j + y k a) xi + j + (4y – z)k b) xi + yj + (z – 4y)k c) i + j + (4y – z)k d) i + yj + (4y – z)k

Description : Find the curl of the vector A = yz i + 4xy j + y k a) xi + j + (4y – z)k b) xi + yj + (z – 4y)k c) i + j + (4y – z)k d) i + yj + (4y – z)k

Last Answer : d) i + yj + (4y – z)k

Is the vector is irrotational. E = yz i + xz j + xy k a) Yes b) No

Description : Is the vector is irrotational. E = yz i + xz j + xy k a) Yes b) No

Last Answer : a) Yes

Find the curl of the vector and state its nature at (1,1,-0.2) F = 30 i + 2xy j + 5xz 2 k a) √4.01 b) √4.02 c) √4.03 d) √4.04

Description : Find the curl of the vector and state its nature at (1,1,-0.2) F = 30 i + 2xy j + 5xz 2 k a) √4.01 b) √4.02 c) √4.03 d) √4.04

Last Answer : d) √4.04

The curl of curl of a vector is given by, a) Div(Grad V) – (Del) 2 V b) Grad(Div V) – (Del) 2 V c) (Del) 2 V – Div(Grad V) d) (Del) 2 V – Grad(Div V)

Description : The curl of curl of a vector is given by, a) Div(Grad V) – (Del) 2 V b) Grad(Div V) – (Del) 2 V c) (Del) 2 V – Div(Grad V) d) (Del) 2 V – Grad(Div V)

Last Answer : b) Grad(Div V) – (Del) 2 V

Find whether the vector is solenoidal, E = yz i + xz j + xy k a) Yes, solenoidal b) No, non-solenoidal c) Solenoidal with negative divergence d) Variable divergence

Description : Find whether the vector is solenoidal, E = yz i + xz j + xy k a) Yes, solenoidal b) No, non-solenoidal c) Solenoidal with negative divergence d) Variable divergence

Last Answer : a) Yes, solenoidal

Find the divergence of the vector yi + zj + xk. a) -1 b) 0 c) 1 d) 3

Description : Find the divergence of the vector yi + zj + xk. a) -1 b) 0 c) 1 d) 3

Last Answer : b) 0

Compute the divergence of the vector xi + yj + zk. a) 0 b) 1 c) 2 d) 3

Description : Compute the divergence of the vector xi + yj + zk. a) 0 b) 1 c) 2 d) 3

Last Answer : d) 3

Curl of gradient of a vector is a) Unity b) Zero c) Null vector d) Depends on the constants of the vector

Description : Curl of gradient of a vector is a) Unity b) Zero c) Null vector d) Depends on the constants of the vector

Last Answer : c) Null vector

Divergence of gradient of a vector function is equivalent to a) Laplacian operation b) Curl operation c) Double gradient operation d) Null vector

Description : Divergence of gradient of a vector function is equivalent to a) Laplacian operation b) Curl operation c) Double gradient operation d) Null vector

Last Answer : a) Laplacian operation

Transform the vector (4,-2,-4) at (1,2,3) into spherical coordinates. a) 3.197i – 2.393j + 4.472k b) -3.197i + 2.393j – 4.472k c) 3.197i + 2.393j + 4.472k d) -3.197i – 2.393j – 4.472k

Description : Transform the vector (4,-2,-4) at (1,2,3) into spherical coordinates. a) 3.197i – 2.393j + 4.472k b) -3.197i + 2.393j – 4.472k c) 3.197i + 2.393j + 4.472k d) -3.197i – 2.393j – 4.472k

Last Answer : b) -3.197i + 2.393j – 4.472k

Vector transformation followed by coordinate point substitution and vice-versa, both given the same result. Choose the best answer. a) Possible, when the vector is constant b) Possible, when the vector is variable c) Possible in all cases d) Not possible

Description : Vector transformation followed by coordinate point substitution and vice-versa, both given the same result. Choose the best answer. a) Possible, when the vector is constant b) Possible, when the vector is variable c) Possible in all cases d) Not possible

Last Answer : a) Possible, when the vector is constant