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Class 12 · Physics
→Three equal positive charges are placed at the corners of an equilateral triangle. Each force on one selected charge has magnitude 60 N. What is the net force on that charge?
Class 12 · Physics
→Two equal forces act on a charge at 90°. If the resultant is 35√2 N, what is the magnitude of each force?
Class 12 · Physics
→Two equal forces act on a charge at an angle of 60°. If their resultant is 40√3 N, what is the magnitude of each force?
Class 12 · Physics
→If the force must become four times and the product of the charges becomes 64 times, what change in distance is needed?
Class 12 · Physics
→If the product of the charges becomes 81 times larger and the force must remain unchanged, how should the distance change?
Class 12 · Physics
→The force between two charges is 160 N. If both charges become four times and the distance becomes eight times, what is the new force?
Class 12 · Physics
→The force between two charges is 216 N. If one charge is made eight times and the distance is made six times, what is the new force?
Class 12 · Physics
→What is the most reliable method in an expert-level multiple-charge Coulomb-law problem?
Class 12 · Physics
→A target charge is at the centre of a square. Equal positive charges occupy one pair of opposite corners, and equal negative charges occupy the other pair. If all charge magnitudes are equal, what is the net force on the target?
Class 12 · Physics
→Equal charges are placed at all four corners of a square. For a charge at one corner, how does the force due to the opposite corner compare with the force due to one adjacent corner?
Class 12 · Physics
→A negative target charge has an equal positive charge above it and an equal negative charge below it, both at equal distances. What is the direction of the net force on the target?
Class 12 · Physics
→A positive target charge has a negative charge above it and an equal positive charge below it, both at equal distances and with equal magnitudes. What is the direction of the net force on the target?
Class 12 · Physics
→A target is acted upon by a 40 N southward force and a 9 N westward force. In which direction does the resultant force point?
Class 12 · Physics
→Two charges repel each other. If the magnitudes of both charges become one-fifth of their original values and only one charge changes sign, what happens to the force?
Class 12 · Physics
→Two charges attract each other. If one charge is made eight times larger and the sign of the other charge is reversed, what will be the nature and magnitude of the new force relative to the original force?
Class 12 · Physics
→The distance between two equal charges is reduced to one-fourth of its original value. To keep the force unchanged, what should each charge become?
Class 12 · Physics
→Two equal charges separated by a distance of 4 units produce a certain force. If the distance is increased to 8 units, by what factor should each charge change to produce the same force?
Class 12 · Physics
→If the vector sum of three forces is zero and the first two perpendicular forces are 9 N and 12 N, what is the magnitude of the third force?
Class 12 · Physics
→Two external charges exert perpendicular forces of 11 N and 60 N on a target charge. What is the magnitude of the resultant force?
Class 12 · Physics
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