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In a region of space, magnetic field exi...

In a region of space, magnetic field exists in a cylindrical region of radius a centred at origin with magnetic field along negative z-direction. The field is given by `vecB=-B_(0)thatk`. The force experienced by a stationary charge q placed at (r, 0, 0), where `r gt a` is

A

`qB_(0)`

B

`(qB_(0)a^(2))/(2r)`

C

`(qB_(0)r)/(2)`

D

Zero

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-ELECTROMAGNETIC INDUCTION-Assignment (SECTION - B)
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  2. A semi-circular loop of radius R is placed in a uniform magnetic field...

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  3. A capacitor in LC oscillatory circuit has a maximum potential of V vol...

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  4. Figure shows a conducting loop placed in a magnetic field. The flux th...

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  5. In a part of ac circuit shown in the figure, R=0.2 Omega. At the insta...

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  6. A ring made of insulating material is rolling without slipping on a ho...

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  7. In a region of space, magnetic field exists in a cylindrical region of...

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  8. A conducting rod of length L slides at a constant velocity V on two pa...

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  9. The figure shown an L-shaped rod rotating about its end O in a plane p...

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  10. Figure shows two circular rings of radii a & b (a gt b) joined togethe...

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  11. In the following circuit choose the correct statement. If the switch i...

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  12. A small square loop of wire of side l is placed inside a large square ...

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  13. Figure shows part of a circuit. If l = 5A and is decreasing at a const...

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  14. A semicircle conducting ring of radius R is placed in the xy plane, as...

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  15. A straight rod of length L is rotating about an axis passing through O...

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  16. A uniform circular ring of radius R, mass m has uniformly distributed ...

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  17. Two different coils have self inductances L(1)=8mH and L(2)=2mH. The c...

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  18. A circular conducting ring is rotated about one of its diameter in a m...

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  19. A inductor of inductance L is decayed through a resistance R. A radioa...

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  20. A conducting wire in the shape of Y with each side of length L is movi...

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