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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