SET 3: Force on Current-Carrying Conductors and Electric Motors
Introduction: This set covers the force experienced by current-carrying conductors in magnetic fields, Fleming's left-hand rule, and the working principle of electric motors. Questions also include applications like MRI and practical devices.
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📘 SCIENCE
PHYSICS | Magnetic Effects of Electric Current-C
📝 Questions: 50
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Q1. Which rule is used to find the direction of force on a current-carrying conductor placed in a magnetic field?
Q2. The force on a current-carrying conductor depends on the:
Q3. A magnetic field exerts force on a nearby:
Q4. Magnetic force on a conductor is perpendicular to:
Q5. When either current or magnetic field is zero, the force on the conductor is:
Q6. Increasing current in the conductor increases the force acting on it because magnetic field:
Q7. The combined study of current, magnetic field, and force leads to the development of:
Q8. The direction of force changes when the direction of current is:
Q9. An electromagnet works only when:
Q10. The magnetic field inside a solenoid is uniform because field lines are:
Q11. Each small section of a circular loop contributes magnetic field at the centre in:
Q12. The aluminium rod is placed between the poles of a:
Q13. What is the device that converts electrical energy into mechanical energy using the magnetic effect of current?
Q14. The force on a current-carrying conductor is due to interaction between:
Q15. A uniform magnetic field is represented by field lines that are:
Q16. Displacement of the rod shows that a magnetic field exerts a:
Q17. The magnitude of magnetic field at a point increases when the current through the wire:
Q18. Andre Marie Ampere suggested that a magnet exerts force on a:
Q19. The rod moves because charges inside it experience:
Q20. What is the effect on the force experienced by a current-carrying conductor in a magnetic field if the current is increased?
Q21. Reversing the direction of current causes the rod to move towards the:
Q22. The phenomenon of force on a current-carrying conductor was explained by:
Q23. Field due to each turn of a coil adds up because current flows in:
Q24. The magnetic field pattern of a solenoid is similar to that of a:
Q25. The magnetic field around a straight conductor depends inversely on:
Q26. One end of a current-carrying solenoid behaves as:
Q27. The magnetic field produced by a straight wire becomes weaker when:
Q28. When the compass is moved farther from the current-carrying wire, the needle deflection:
Q29. Inside a solenoid, the magnetic field lines are:
Q30. Magnetic field inside a circular loop is due to:
Q31. The interaction between magnetic field and current leads to:
Q32. At the centre of a current-carrying circular loop, the magnetic field lines appear:
Q33. Devices that use current-carrying conductors and magnetic fields include:
Q34. The direction of rotation of the motor coil is determined using:
Q35. In Fleming's left-hand rule, the middle finger represents the direction of:
Q36. The forces acting on the two arms of the coil cause it to:
Q37. When the magnetic field direction is reversed, the force on the rod:
Q38. The direction of force on the rod reverses when the direction of:
Q39. In Fleming's left-hand rule, current direction is taken as:
Q40. MRI is used for:
Q41. In an electric motor, the coil is placed between:
Q42. An electric motor converts:
Q43. The displacement of the aluminium rod shows that a force is exerted on a:
Q44. The force on a moving charge in a magnetic field is always:
Q45. Using a soft iron core in a motor helps to:
Q46. The force on the conductor is maximum when current is at _____ to the magnetic field.
Q47. The magnetic field produced inside the human body is mainly significant in the:
Q48. The split ring in an electric motor acts as a:
Q49. MRI stands for:
Q50. The three fingers in Fleming's left-hand rule are kept:
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