What is the relationship between heat and electricity. Please provide a metaphor.
When current flows through a resistance and the temperature rises, heat is generated. It is like when you’re hungry(the current flow is you trying to get to your food) and have to wait in line(which is the resistance), the longer you wait the angrier(heat) you get.
Why is it warm near an incandescent light bulb?
It is warm near a bulb because of the Thermal Emission which happens when the temperature of substance increases and thermal energy is emitted.
What is a superconductor? What are they used for in real life? You may have to look this up. How could one make a metal a superconductor?
A superconductor is neither a metal nor an insulator. It is a material that can conduct electricity perfectly.The electrical current will flow infinitely never degrading or dissipating. Superconductors are enhanced when combined with magnets. MRI’s create a large magnetic field so doctors can screen people. To make a metal a superconductor you could place a really strong magnet next to it.
What is Ampere's Law?
The magnetic fields that are generated when using electricity. They are generated in circular patterns around a wire.
If current of the same size flows in the same direction in two electric wires placed side by side, what happens?
The two magnetic fields combine to form a large magnetic field and a force of attraction is generated causing the two wire to attract each other.
What happens if current of the same size flows in opposite directions in two electric wires placed side by side?
A force of repulsion is generated and the two wires negate each other and the magnetic fields disappear.
Please read about Flemings Left and Right Hand Rule. Think about this Rule with respect to the motors we have made this week.
Flemings left hand rule demonstrates how force behaves when placed in a magnetic field. A DC motor turns by using the Left Hand force. The left hadn rule is used to determine the direction of the current.
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