Description : The force per unit length of two conductors carrying equal currents of 5A separated by a distance of 20cm in air(in 10 -6 order) a) 25 b) 35 c) 40 d) 50
Last Answer : a) 25
Description : Two electron beams move parallel to each other. The nature of force between them is a) Attractive b) Repulsive c) Dependent on magnitude of velocity d) None
Last Answer : b) Repulsive
Description : The nuclear force is - (1) Short range repulsive force (2) Short range attractive force (3) Long range repulsive force (4) Long range attractive force
Last Answer : (2) Short range attractive force Explanation: Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
Description : Two parallel conductors `A` and `B` of equal lengths carry currents `I` and `10 I`, respectively, in the same direction. Then
Last Answer : Two parallel conductors `A` and `B` of equal lengths carry currents `I` and `10 I`, ... A and B will attract each other with different forces
Description : What opposing force must be overcome by charges flowing in electronic currents?
Last Answer : What is the answer ?
Description : The flux lines of two energised coils overlapping on each other will give a) Series aiding b) Shunt aiding c) Series opposing d) Shunt opposing
Last Answer : a) Series aiding
Description : The equivalent inductance of two coils with series opposing flux having inductances 7H and 2H with a mutual inductance of 1H. a) 10 b) 7 c) 11 d) 13
Last Answer : b) 7
Description : Which type of flux will increase the inductance? a) Series aiding b) Series opposing c) Shunt aiding d) Shunt opposing
Description : Ladies: which mustache/beard style(s) do you find most repulsive or attractive?
Last Answer : big grizzly adams beards are gross. nicely trimmed or shaped beards are nice. goatees are nice on the right guy.
Description : In conductors, which two parameters are same? a) Wavelength and phase constant b) Phase and attenuation constant c) Attenuation constant and skin depth d) Skin depth and wavelength
Last Answer : b) Phase and attenuation constant
Description : For time varying currents, the field or waves will be a) Electrostatic b) Magneto static c) Electromagnetic d) Electrical
Last Answer : c) Electromagnetic
Description : Calculate the frequency at which the conduction and displacement currents become equal with unity conductivity in a material of permittivity 2. a) 18 GHz b) 9 GHz c) 36 GHz d) 24 GHz
Last Answer : b) 9 GHz
Description : Two charges 1C and -4C exists in air. What is the direction of force? a) Away from 1C b) Away from -4C c) From 1C to -4C d) From -4C to 1C
Last Answer : c) From 1C to -4C
Description : The lines of force are said to be a) Real b) Imaginary c) Drawn to trace the direction d) Not significant
Last Answer : c) Drawn to trace the direction
Description : The skin effect is a phenomenon observed in a) Insulators b) Dielectrics c) Conductors d) Semiconductors
Last Answer : c) Conductors
Description : In conductors, the E and H vary by a phase difference of a) 0 b) 30 c) 45 d) 60
Last Answer : c) 45
Description : For conductors, the loss tangent will be a) Zero b) Unity c) Maximum d) Minimum
Last Answer : c) Maximum
Description : In perfect conductors, the phase shift between the electric field and magnetic field will be a) 0 b) 30 c) 45 d) 90
Description : In conductors, which condition will be true? a) σ/ωε > 1 b) σωε > 1 c) σ/ωε < 1 d) σωε < 1
Last Answer : a) σ/ωε > 1
Description : Skin depth phenomenon is found in which materials? a) Insulators b) Dielectrics c) Conductors d) Semiconductors
Description : Both the conduction and displacement current densities coexist in which medium? a) Only conductors in air b) Only dielectrics in air c) Conductors placed in any dielectric medium d) Both the densities can never coexist
Last Answer : c) Conductors placed in any dielectric medium
Description : An implication of the continuity equation of conductors is given by a) J = σ E b) J = E/σ c) J = σ/E d) J = jwEσ
Last Answer : a) J = σ E
Description : In good conductors, the electric and magnetic fields will be a) 45 in phase b) 45 out of phase c) 90 in phase d) 90 out of phase
Last Answer : b) 45 out of phase
Description : For conductors, the free electrons will exist at a) Valence band b) Middle of valence and conduction band c) Will not exist d) Conduction band
Last Answer : d) Conduction band
Description : Find the range of band gap energy for conductors. a) >6 eV b) 0.2-0.4 eV c) 0.4-2 eV d) 2-6 eV
Last Answer : b) 0.2-0.4 eV
Description : Which of the following are conductors? a) Ceramics b) Plastics c) Mercury d) Rubber
Last Answer : c) Mercury
Description : Dielectric constant will be high in a) Conductors b) Semiconductors c) Insulators d) Superconductors
Last Answer : c) Insulators
Description : Two long conductors, separated by a distance `d` carry current `I_(1) and I_(2)` in the same direction . They exert a force `F` on each other. Now the
Last Answer : Two long conductors, separated by a distance `d` carry current `I_(1) and I_(2)` in the same direction . They exert a ... . `-(2F)/(3)` D. `-(F)/(3)`
Last Answer : Two long conductors, separated by a distance `d` carry current `I_(1) and I_(2)` in the same direction . They exert a ... C. `(2F)/(3)` D. `(-2F)/(3)`
Description : When the electric field travels in +x direction and the EM wave is travelling the –y direction, then the magnetic field will be travelling in which direction? a) +z direction b) –z direction c) Either +z or –z direction d) Does not trave
Last Answer : c) Either +z or –z direction
Description : The torque of a conductor is defined only in the case when a) The field is perpendicular to the loop b) The plane of the loop is parallel to the field c) The plane of the loop is perpendicular to the current direction d) The field and the current direction are same
Last Answer : b) The plane of the loop is parallel to the field
Description : A hand pump is usually fitted: a. For ground servicing purposes b. Lowering the landing gear in an emergency c. Pressurising the oleo struts in the air d. Retracting the gear after take-off
Last Answer : a. For ground servicing purposes
Description : Two parallel long wires carry currents `i_(1) "and" i_(2)` with `i_(1) gt i_(2)`.When the currents are in the same direction then the magnetic field m
Last Answer : Two parallel long wires carry currents `i_(1) "and" i_(2)` with `i_(1) gt i_(2)`.When the currents are in the same ... 4` B. `5:3` C. `7:11` D. `11:7`
Description : Two infinitely long conductors carrying equal currents are shaped as shown. The short sectins are all of equal lengths. The point P is located symmetr
Last Answer : Two infinitely long conductors carrying equal currents are shaped as shown. The short sectins are all of equal lengths. ... zero B. B C. D. `sqrt(2)B`
Description : In the diagram `I_(1),I_(2)` are the strength of the currents in the loop and straight conductors respectively `OA=AB=R.` the net magnetic field at th
Last Answer : In the diagram `I_(1),I_(2)` are the strength of the currents in the loop and straight conductors respectively `OA=AB= ... ` C. `1/(pi)` D. `1/(2 pi)`
Description : `A, B` and `C` are parallel conductors of equal length carrying currents `I, I` and `2I` respectively. Distance between `A` and `B` is `x`. Distance b
Last Answer : `A, B` and `C` are parallel conductors of equal length carrying currents `I, I` and `2I` respectively. Distance ... F_(2)` D. `F_(1) = -F_(2)`
Description : Three conductors draw respectively currents of 1 A, 2 A and 4 A when connected in turn across a battery. If they are connected in series across the sa
Last Answer : Three conductors draw respectively currents of 1 A, 2 A and 4 A when connected in turn across a battery. If they are ... `(4)/(7)A` D. `(5)/(7)A`
Description : The magnetic meridian at any point, is the direction indicated by a freely suspended (A) Magnetic needle (B) And properly balanced magnetic needle (C) Properly balanced and uninfluenced by local attractive force (D) Magnetic needle over an iron pivot
Last Answer : (C) Properly balanced and uninfluenced by local attractive force
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 in moving a test charge from one point to another in an equipotential surface is zero. State True/False. a) True b) Fals
Last Answer : a) True
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 : 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
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 : The resultant electric field of two components in the x and y direction having amplitudes 6 and 8 respectively is a) 100 b) 36 c) 64 d) 10
Last Answer : d) 10
Description : For dielectrics, which two components will be in phase? a) E and wave direction b) H and wave direction c) Wave direction and E x H d) E and H
Last Answer : d) E and H
Description : Find the magnetic field intensity due to an infinite sheet of current 5A and charge density of 12j units in the positive y direction and the z component is below the sheet. a) 6 b) 0 c) -6 d) 60k
Last Answer : c) -6
Description : Find the magnetic field intensity due to an infinite sheet of current 5A and charge density of 12j units in the positive y direction and the z component is above the sheet. a) -6 b) 12k c) 60 d) 6
Last Answer : d) 6
Description : In isotropic materials, which of the following quantities will be independent of the direction? a) Permittivity b) Permeability c) Polarisation d) Polarizability
Last Answer : a) Permittivity
Description : The best definition of polarisation is a) Orientation of dipoles in random direction b) Electric dipole moment per unit volume c) Orientation of dipole moments d) Change in polarity of every dipole
Last Answer : b) Electric dipole moment per unit volume