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Electrical Engineering Objective Questions { Basic Concept of Electricity }

85.  V B is based on
A. Gauss's law
B. Ampere's law
C. Faraday's law
D. Ohm's law

86.  The Biot-Savart's law is a general modifi-cation of
A. Coulomb law
B. Ampere's law
C. Faraday's law
D. Ohm's law

87.  The direction of mechanical force experienced on a current carrying conductor placed in a magnetic field is determined by
A. Fleming's left hand rule
B. Fleming's right hand rule
C. Helix rule
D. Cork screw rule

88.  If a current carrying conductor is placed in a magnetic field, the mechanical force experienced on the conductor is determined by
A. simple product
B. dot product
C. cross product
D. any of these

89. The force experienced by a current carrying conductor lying parallel to a magnetic field is
A. zero
B. B I /
C. B I / sin 0
D. B I /cos 0

90. An in finitely long conductor carrying a current is embedded in a semi-infinite medium of permeability pp as shown in the given figure. For itti > ja2, the conductor will experience
A. no force
B. a force that moves it away from the interface
C. a force towards the interface
D. a force parallel to the interface.

91. A straight conductor of length / moving with a velocity v in the presence of a magnetic field of flux density B directed at an angle 0 with the direction of v experiences a force. Which of the following statement(s) is/are true for the magnitude of the force? 1. It is independent of 0.2. It is proportional to /2. 3. It is proportional to B. 4. It is independent of v. Select the correct answer from the codes given below :Codes :
A. 1, 2 and 3
B. 4 alone
C. 3 alone
D. 2 and 4

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