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Three point charges +q each are kept at the vortices of an equilateral triangle of side l. determine the magnitude and sign of the charge to kept at its centroid so that the charges at the vortices remain in equilibrium .?
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MCQ: Electric Charges and Fields - Class 12


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FAQs on MCQ: Electric Charges and Fields - Class 12

1. What is the concept of electric charge?
Ans. Electric charge is a fundamental property of matter that determines how it interacts with electric and magnetic fields. It can be positive or negative, with like charges repelling each other and opposite charges attracting each other.
2. How is electric charge measured?
Ans. Electric charge is measured in units called coulombs (C). One coulomb is equal to the charge of approximately 6.24 x 10^18 electrons or protons.
3. What is the relationship between electric charge and electric field?
Ans. Electric charges create electric fields around them. The electric field is a region in which a charged particle experiences a force. The strength of the electric field is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance from the charge.
4. What are some common examples of electric charges in everyday life?
Ans. Some common examples of electric charges in everyday life include static electricity (when clothes stick together after being in a dryer), lightning, the spark produced when a doorknob is touched after walking across a carpet, and the flow of current in electrical devices.
5. How does the concept of electric charge relate to electrical circuits?
Ans. Electric charge is the basis of electrical circuits. In a circuit, charges flow through a closed loop, typically facilitated by a conductor such as a wire. This flow of charges, known as an electric current, allows for the transfer of energy and the functioning of electrical devices.
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