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State the rule that is used to find the ...

State the rule that is used to find the direction of magnetic field acting at a point near a current carrying straight conductor.

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Right-Hand Thumb Rule.
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PQ is a current carrying conductor in the plane of the paper as shown in the figure below. (i) Find the directions of the magnetic fields produced by it at points R and S? (ii) Given r_(1)gt r_(2) , where will the strength of the magnetic field be larger? Give reasons (iii) If the polarity of the battery connected to the wire is reversed, how would the direction of the magnetic field be changed? (iv) Explain the rule that is used to find the direction of the magnetic field for a straight current carrying conductor.

__________Right-hand grip rule is used to find the direction of deflection of a magnetic needle placed near a current carrying conductor.

Magnetic field at a point on the line of current carrying conductor is

With the help of a labelled circuit diagram, illustrate the pattern of field lines of the magnetic field around a current-carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current-carrying conductor?

The strength of the magnetic field around a long straight current carrying conductor :

PRADEEP-MAGNETIC EFFECTS OF ELECTRIC CURRENT-Additional Questions A. (very short)
  1. What important observation did Oersted make in his experiment with cur...

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  2. What is the form of magnetic field lines due to a straight current-car...

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  3. State the rule that is used to find the direction of magnetic field ac...

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

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  5. Name the unit used to measure magnetic field.

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  6. What is a solenoid?

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  7. What for do we apply clock-rule?

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  8. What is the effect of inserting a soft iron core inside a current-carr...

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  9. What is the composition of the alloy Alnico?

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  10. What is the composition of the alloy Nipermag?

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  11. What type of core is used to make an electromagnet?

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  12. What are permanent magnets made of?

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  13. Why is soft-iron not used for making a permanent magnet?

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  14. Name the rule to find the direction of force on a current-carrying con...

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  15. What is the relation between a tesla, an ampere and a meter.

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  16. What is the force acting on charge (q) moving in a direction perpendic...

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  17. Which rule do we use to find the direction of this force?

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  18. How are magnetic field lines related to the strength of a magnetic fie...

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  19. What is the relation between magnetic field (B), current (I) and dista...

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  20. What is the magnitude of force acting on a current-carrying conductor ...

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