# What is the name given to a material with zero resistance that can conduct electricity without a loss of energy?

Super conducting materials.

This occurs at very low temperature in certain metals.

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The material with zero resistance that can conduct electricity without a loss of energy is called a superconductor.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- If a current of #4 A# passing through a circuit generates #12 W# of power, what is the resistance of the circuit?
- If a current of #3 A# passing through a circuit generates #90 W# of power, what is the resistance of the circuit?
- Why is current the same everywhere in a series circuit?
- An electric toy car with a mass of #4 kg# is powered by a motor with a voltage of #7 V# and a current supply of #9 A#. How long will it take for the toy car to accelerate from rest to #7/2 m/s#?
- An electric toy car with a mass of #4 kg# is powered by a motor with a voltage of #4 V# and a current supply of #2 A#. How long will it take for the toy car to accelerate from rest to #7/2 m/s#?

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