Mid-term2

# Mid-term2 - Mid-term Name ID(8 points each question 1...

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Mid-term Name: ID: k 1 (8 points each question) 1. Calculate the electric field strength 2 meters away from charge Q of .The quantity k is 8.99×10 9 Nm 2 /C 2 , the constant in Coulomb’s Law. 1. State Coulomb’s Law and Gauss’s Law in your own language and write out the formulas. 1. State Ohm’s Law and Faraday’s Law of induction in your own language and write out the formulas. 1. A solid metal sphere with a radius of 6 cm sits on an insulating post. A wire connects to the sphere’s bottom. The wire carriers a current of 1 μA and flows into the sphere when the switch is closed. One (1) minute after the switch is closed, what is the electric potential at the surface of the surface assuming potential far away from the sphere is zero. What is the electric potential inside this sphere 3 minutes after the switch is closed? 5. A straight wire of cross section A and length L has a resistance R and is connected to a battery of emf V , ignore the internal resistance. A certain amount of heat H is generated through the wire every second. When a second wire of the same material is

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