CBSE Class 12-science Physics Coulomb's Law
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- A certain charge Q is divided into two parts q and Q − q, which are then separated by a certain distance. What must q be in terms of Q to maximize the electrostatic repulsion between the two charges?
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- 2 identical point charges q each are kept 2 metre apart in air. A third point charge Q of unknown magnitude and sign is placed on the line joining the charges such that the system remains in equilibrium find the position and nature of Q
- A) Two charges +4esu and +9 esu are situated at a distance of 10 cm . A unit charge is situated at a point on the line joining the charges. At what point the unit charge experiences a force which is (a) equal and opposite,(b)equal and in the same direction? B) Two conductors have resistance R1 and R2 at 0°C. Their temperature coefficients of resistances are a1 and a2 respectively. Show that the temperature coefficients of their equivalent resistances when joined in series and in parallel are respectively (R1a1+R2a2)/(R1+R2) and (R1a2+R2a1)/(R1+R2)
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