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Magnetic lines of force...

Magnetic lines of force

A

form closed circuits

B

cannot intersect

C

are crowded together near the poles

D

all the above are correct

Text Solution

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The correct Answer is:
D
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Which of the following is/are not the main difference between electric lines of force and magnetic lines of force ? (1) Electric lines of force are closed curves whereas magnetic lines of force are open curves. (2) Magnetic lines of force cut each other whereas electric lines of force do not cut. (3) Electric lines of force cut each other whereas magnetic lines of force do not cut. (4) Electric lines of force are open curves whereas magnetic lines of force are closed curves

Assertion (A): The basic difference between magnetic lines of force and electric lines of force is electric lines of force are discontinuous and magnetic lines of force are continuous. Reason (R ): Magnetic lines of force exist in a magnet but no electric lines of force exists in a charged body.

A circular loop which is in the form of a major arc of a constant magnetic field B is applied in the vertical direction such that the magnetic lines of forces go into the plane. If R is the radius of circle and it carries a current I in the clockwise direction, then the force on the loop will be

The electric lines of force............. From continuous closed path whereas the magnetic line of force from ......... Path.

Which of the following properties of magnetic line of force differs them from electrostatic lines of force ?

A charged particle enters a region of uniform magnetic field at an angle of 85@ to the magnetic line of force . The path of the particle is a circle .

Assertion: Basic difference between an electric line and magnetic line of force is that former is discontinuous and the latter is continuous or endless. Reason: No electric lines of force exist inside a charged body but magnetic lines do exist inside a magnet.

A charged particle enters a region of uniform magnetic field at an angle of 85^@ to the magnetic line of force. The path of the particle is a circle. Is this statement true or false?

Consider the following statements (1) An isolated electric charge exists but an isolated magnetic monopole does not exist. (2) Electric lines of force are not closed, but magnetic lines of force are closed. Which of the statements given above is/are corect?

MCGROW HILL PUBLICATION-HEATING AND MAGNETIC EFFECTS OF CURRENT -HIGHER ORDER THINKING QUESTIONS
  1. Magnetic lines of force

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  2. none of these

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  3. Two heating wires of equal length are first con nected in series and t...

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  4. Of the bulbs in a house, one glows brighter than the other, which of t...

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  5. An electric fan and a heater are marked as 100 watt , 220 volt and 100...

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  6. If a 2 kW boiler is used everyday for 1 hour, then electrical energy c...

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  7. Appliances based on heating effect of current work on

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  8. Heat developed in an electric wire of resistance Rohm by current / amp...

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  9. If R(1) and R(2) are respectively the filament resistances of a 200 wa...

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  10. Two electric bulbs A and B are disigned for the same voltage. Their po...

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  11. Five equal risistors when connected in series dissipted 5 W power. If ...

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  12. Two heaters, eacch maked 1000 W, 250 V are connected in series with a ...

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  13. Two bulbs, one of 50 watt and another of 25 watt are connected in seri...

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  14. 1 joule equals

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  15. You have the following appliances each of 500 W running 220 V ac. (i...

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  16. An electric lamp is marked 60 W, 240 V. If it operats at 200, V the cu...

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  17. Which of the following can be used to express energy ?The symbols used...

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  18. Two metallic wires of the same material and same length have different...

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  19. In the above question 73, when the wires are connected in parallel, th...

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  20. Two equal resistances are connected in seires across a battery and con...

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  21. Heat produced in a wire of resistance R due to current flowing at cons...

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