1 Calculate the distance in centimeters in which two electric charges of 7 mC and 3 mC are rejected with a force of 5.47 N. Besides calculate the value of the electric force if they were in oil.
2. A charge of 5µC is in the air to 20 cm of another charge of – 2 µC. What is the value of the force exerted by the charges? What would the value of the force if they were submerged in water?
3. An electric charge of – 3µC is in the air to another charge to 12 mm. The value of the force with which are rejected is 750 N. What is the value of the unknown charge?
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