Description : Potential difference is the work done in moving a unit positive charge from one point to another in an electric field. State True/False. a) True b) False
Last Answer : a) True
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
Description : What work is work done in moving a positive charge on an equipotential surface? -Do You Know?
Last Answer : answer:
Description : What work is work done in moving a positive charge on an equipotential surface?
Last Answer : Zero
Description : Equipotential surface is a a) Real surface b) Complex surface c) Imaginary surface d) Not existing surface
Last Answer : c) Imaginary surface
Description : A field in which a test charge around any closed surface in static path is zero is called a) Solenoidal b) Rotational c) Irrotational d) Conservativ
Last Answer : d) Conservative
Description : The field intensity of a charge defines the impact of the charge on a test charge placed at a distance. It is maximum at d = 0cm and minimises as d increases. State True/False a) True b) False
Description : Find the work done moving a charge 2C having potential V = 24volts is a) 96 b) 24 c) 36 d) 48
Last Answer : d) 48
Description : An electric field is given as E = 6y 2 z i + 12xyz j + 6xy 2 k. An incremental path is given by dl = -3 i + 5 j – 2 k mm. The work done in moving a 2mC charge along the path if the location of the path is at p(0,2,5) is (in Joule) a) 0.64 b) 0.72 c) 0.78 d) 0.80
Last Answer : b) 0.72
Description : For a test charge placed at infinity, the electric field will be a) Unity b) +∞ c) Zero d) -∞
Last Answer : c) Zero
Description : Electric field of an infinitely long conductor of charge density λ, is given by E = λ/(2πεh).aN. State True/False. a) True b) False
Description : From the formula F = qE, can prove that work done is a product of force and displacement. State True/False a) True b) False
Description : The attenuation in a good dielectric will be non- zero. State True/False. a) True b) False
Description : The magnetic field intensity will be zero inside a conductor. State true/false. a) True b) False
Last Answer : b) False
Description : When curl of a path is zero, the field is said to be conservative. State True/False. a) True b) False
Description : Divergence theorem computes to zero for a solenoidal function. State True/False. a) True b) False
Description : When gradient of a function is zero, the function lies parallel to the x-axis. State True/False. a) True b) False
Description : The curl of gradient of a vector is non-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
Description : The Gaussian surface for a point charge will be a) Cube b) Cylinder c) Sphere d) Cuboid
Last Answer : c) Sphere
Description : It is difficult to create test scenarios for high-level risks A. True B. Fals
Last Answer : A. True
Description : Gauss law for electric field uses surface integral. State True/False a) True b) False
Description : Two small diameter 10gm dielectric balls can slide freely on a vertical channel. Each carry a negative charge of 1μC. Find the separation between the balls if the lower ball is restrained from moving. a) 0.5 b) 0.4 c) 0.3 d) 0.2
Last Answer : c) 0.3
Description : The work done by a charge of 10μC with a potential 4.386 is (in μJ) a) 32.86 b) 43.86 c) 54.68 d) 65.68
Last Answer : b) 43.86
Description : Electric field intensity due to infinite sheet of charge σ is a) Zero b) Unity c) σ/ε d) σ/2ε
Last Answer : d) σ/2ε
Description : On equating the generic form of current density equation and the point form of Ohm’s law, we can obtain V=IR. State True/False. a) True b) False
Description : The point form of Gauss law is given by, Div(V) = ρv 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
Description : Calculate the electric field due to a surface charge of 20 units on a plate in air(in 10 12 order) a) 2.19 b) 1.12 c) 9.21 d) 2.91
Last Answer : b) 1.12
Description : The total charge of a surface with densities 1,2,...,10 is a) 11 b) 33 c) 55 d) 77
Last Answer : c) 55
Description : A circular disc of radius 5m with a surface charge density ρs = 10sinφ is enclosed by surface. What is the net flux crossing the surface? a) 3 b) 2 c) 1 d) 0
Last Answer : d) 0
Description : The Gaussian surface for a line charge will be a) Sphere b) Cylinder c) Cube d) Cuboid
Last Answer : b) Cylinder
Description : Find the flux density of line charge of radius (cylinder is the Gaussian surface) 2m and charge density is 3.14 units? a) 1 b) 0.75 c) 0.5 d) 0.25
Last Answer : d) 0.25
Description : The electric field intensity is defined as a) Force per unit charge b) Force on a test charge c) Force per unit charge on a test charge d) Product of force and charge
Last Answer : c) Force per unit charge on a test charge
Description : The surface integral of which parameter is zero? a) E b) D c) B d) H
Last Answer : c) B
Description : Which equation will hold good for a magnetic material? a) Line integral of H is zero b) Surface integral of H is zero c) Line integral of B is zero d) Surface integral of B is zero
Last Answer : d) Surface integral of B is zero
Description : Find the current density on the conductor surface when a magnetic field H = 3cos x i + zcos x j A/m, for z>0 and zero, otherwise is applied to a perfectly conducting surface in xy plane. a) cos x i b) –cos x i c) cos x j d) –cos x j
Last Answer : b) –cos x i
Description : A mobile app is an application that can be downloaded and installed on your mobile device or rendered within a browser TRUE FALS
Last Answer : FALSE
Description : An industrial robot is not a general purpose programmable machine possessing certain human like characteristics. (A) True (B) Fals
Last Answer : B
Description : Find the electric field due to charge density of 1/18 and distance from a point P is 0.5 in air(in 10 9 order) a) 0 b) 1 c) 2 d) 3
Last Answer : c) 2
Description : A point charge 0.4nC is located at (2, 3, 3). Find the potential differences between (2, 3, 3)m and (-2, 3, 3)m due to the charge. a) 2.5 b) 2.6 c) 2.7 d) 2.8
Last Answer : c) 2.7
Description : A point charge 2nC is located at origin. What is the potential at (1,0,0)? a) 12 b) 14 c) 16 d) 18
Last Answer : d) 18
Description : A charge located at point p (5,300,2) is said to be in which coordinate system? a) Cartesian system b) Cylindrical system c) Spherical system d) Space system
Last Answer : b) Cylindrical system
Description : The skin depth is calculated from the amplitude of the wave. State true/false a) True b) False
Description : In P polarisation, the electric field lies in the same plane as the interface. State True/False. a) True b) False
Description : In S polarisation, the electric field lies in the plane perpendicular to that of the interface. State True/False a) True b) False
Description : The Snell law is applicable for perpendicular polarisation and the Brewster law is applicable for parallel polarisation. State True/False. a) True b) False
Description : The angle of incidence is equal to the angle of reflection for perfect reflection. State True/False. a) True b) False
Description : The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur. State True/False. a) True b) False
Description : An elliptically polarised wave transmitted at the Brewster angle will be received as an elliptically polarised wave. State True/False a) True b) False