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If an electric current flows in a clock-...

If an electric current flows in a clock-wise direction in a circular loop, facing towards you, which magnetic pole is observed by you ?

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A closed current-carrying loop having a current I is having area A. Magnetic moment of this loop is defined as vec(mu) = vec(IA) where direction of area vector is towards the observer if current is flowing in anticlockwise direction with respect to the observer. If this loop is placed in a uniform magnetic field vec(B) , then torque acting on the loop is given by vec(tau) = vec(mu) xx vec(B) . Now answer the following questions: A uniformly charged insulating ring is rotated in a uniform magnetic field about its own axis, then

A closed current-carrying loop having a current I is having area A. Magnetic moment of this loop is defined as vec(mu) = vec(IA) where direction of area vector is towards the observer if current is flowing in anticlockwise direction with respect to the observer. If this loop is placed in a uniform magnetic field vec(B) , then torque acting on the loop is given by vec(tau) = vec(mu) xx vec(B) . Now answer the following questions: Consider the situation shown in Fig., ring is having a uniformly distributed positive charge. Magnetic field is perpendicular to the axis of ring. Now ring is rotated in anticlockwise direction as seen from left hand side direction of magnetic torque acting on the ring is

A closed current-carrying loop having a current I is having area A. Magnetic moment of this loop is defined as vec(mu) = vec(IA) where direction of area vector is towards the observer if current is flowing in anticlockwise direction with respect to the observer. If this loop is placed in a uniform magnetic field vec(B) , then torque acting on the loop is given by vec(tau) = vec(mu) xx vec(B) . Now answer the following questions: Let ring in the above question is having a radius R and a charge Q is uniformly distributed over it. Ring is rotated with a constant angular velocity (omega) as mentioned above. Torque acting on the ring due to magnetic force is

A current I is flowing in a conductor of length L when it is bent in the form of a circular loop its magnetic moment

PEARSON IIT JEE FOUNDATION-ELECTROMAGNETISM-CONCEPT APPLICATION ( LEVEL 2)
  1. If an electric current flows in a clock-wise direction in a circular l...

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  2. Why is electrical energy transmitted at high voltage from a distant po...

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  3. A magnetic needle placed near a current carrying conductor deflects du...

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  4. Can we use Ampere's right hand rule to determine the deflection o...

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  5. A straight conductor carrying current produces a magnetic field around...

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  6. A transformer has 250 primary turns and 500 secondary turns. If 200 V ...

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  7. What happens if earthing is not proper in a telegraph ?

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  8. What causes the rectangular coil in a D.C. motor to rotate? Explain.

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  9. Two, current carrying conductors are placed parallel to each other. E...

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  10. Can a galvanometer as such be used for measuring the current? Explain.

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  11. A straight conductor carrying current produces a magnetic field around...

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  12. The frequency of sinusoidal A.C. voltage is 50 Hz. How many times does...

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  13. In an electromagnetic induction, what is the source of electric energy...

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  14. Two wires, A and B are placed parallel to each other in a vertical pla...

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  15. A spring made of copper is moved towards a stationary bar magnet. What...

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  16. How do you locate a current-carrying wire concealed in a wall?

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  17. Can we a transformer be used to step up or step down a D.C. voltage? E...

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  18. A magnet is dropped vertically downwards along the axis of the Alumini...

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  19. To detect electric current using a galvanoscope, the plane of the coi...

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  20. By increasing the number of turns in the coil, the strength of the mag...

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  21. Why are magnets with concave shaped poles used in a D.C. motor? What...

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