2. Household circuits in the Philippines commonly run on 220V of electricity. Frequently, circuit breakers are installed that open a circuit if it is drawing more than 15A of current. What is the minimum amount of resistance that must be present in the circuit to prevent the circuit breaker from activating? 3. When is Ohm's Law not applicable? Explain.

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Q: What is the electrical grid, and how does it function in a power system?

A: To explain:What is the electrical grid, and how does it function in a power system?

Q: Methods of protection agains lightning.

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.