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Test Series-25




Instructions

  • Your test contains 10 multiple choice questions with only one answer
  • This is 30 min test.Please make sure you complete it in stipulated time
  • You can Finish this test any time using 'Submit' button.
  • Once finished you get a chance to review all question with correct answers and their solutions.


1.Force on a current conductor in a magnetic field depends on ?
  • Length of the conductor
  • Current in the conductor
  • Magnetic Field
  • All the above

2) which of these is true for electrical motor
  • Converts electrical energy into mechanical energy
  • it works on principle of electromagnetic induction
  • converts mechanical energy into electrical energy
  • None of these

3. which of these is untrue about magnetic lines of force?
  • A stronger magnetic field indicates magnetic lines of forces are closer
  • The magnetic lines of forces do not intersect one another
  • magnetic lines of forces originate from the north pole of a magnet and end at its south poel
  • none of these

4.The magnitude and direction of magnetic field produced by a straight current carrying wire at a given point depends on?
  • Current in the wire
  • Direction of the current
  • Distance of the point from the wire
  • All the above

5. what is true about earth magnetism?
  • Earth is a huge electromagnet
  • Angle of dip at poles is 00<.sup>
  • The angle betweem magnetic meridain and geograhic meridian at a place is called angle of dip
  • None of these

6. which of these will not experience force in magnetic field?
  • Moving charge
  • Bar magnet
  • stationary charge
  • current carrying conductor

7. All the electrical appliances liks fans and socket are connected in parallel across the live and neutral wire in the household circuit?
  • True
  • false

8. A copper wire can not used as fuse wire why?
  • it has high melting point
  • it offers low resistance
  • it is a good conductor of electricity
  • None of these

9. What is true of electric generator?
  • it works on the principle of electromagnetic induction
  • converts mechanical energy into electrical energy
  • it can be used to produced both direct and alternaing current
  • all the above

10.two statement Statement A: Fleming left hand rule is used to determine the force on a current carrying conductor in magnetic field Statement B: Fleming right hand rule is used to determine the induced current for moving conductor in magnetic field
  • A is correct only
  • B is correct only
  • A and B both are correct
  • A and B both are incorrect



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