:- You can add tough questions into
your favourite list for second revision. Note |

Q1. | The electric potential due to an electric dipole at an axial point distant r from the dipole is related to r as | ||||||

A. | r^{1} |
B. | r^{-1} |
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C. | r^{2} |
D. | r^{-2} |
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Q2. | charge q is divided into two parts q1, and (q - q1) what is the ratio q/q1 so that the force between the two parts placed a given distance apart is maximum | ||||||

A. | 1 : 1 |
B. | 2 : 1 |
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C. | 1 : 2 |
D. | 1 : 4 |
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Q3. | The electric potential at the surface of an
atomic nucleus (z = 50) of radius 9 x 10^{-15} m is | ||||||

A. | 80 volt |
B. | 8 x 10^{6} volt |
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C. | 9 volt |
D. | 9 x 10^{5} volt |
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Q4. | A soap bubble is given a negative charge then its radius | ||||||

A. | Decreases |
B. | Increases |
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C. | Remains unchanged |
D. | None of these |
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Q5. | A positively charged glass rod attracts an object. The object must be | ||||||

A. | Negatively charged |
B. | Neutral |
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C. | Either negatively charged or neutral |
D. | A magnet |
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Q6. | The equipotential line due to point charge Q is | ||||||

A. | A straight line |
B. | A circle |
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C. | An ellipse |
D. | A hyperbola |
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Q7. | Equal charges are given to two spheres of different radii. The potential will | ||||||

A. | Be more on the smaller sphere |
B. | Be more on the bigger sphere |
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C. | Be equal on both the sphere |
D. | None of these |
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Q8. | A hollow sphere of charge does not produce an electric field at any | ||||||

A. | Interior point |
B. | Outer point |
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C. | Surface point |
D. | None of these |
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Q9. | A large sphere P of radius R is charged positively. It is momentarily connected to a small sphere Q of radius r. The two spheres now have same | ||||||

A. | Charge |
B. | Electric field |
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C. | Energy |
D. | Potential |
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Q10. | The point charges Q and 2Q are placed at a distance R apart. Where should a third point charge be placed, So that it is in equilibrium | ||||||

A. | At a point on the right of 2Q |
B. | At a point on the left of Q |
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C. | Between Q and 2Q |
D. | None of these |
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