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Electrical Resistance and Wire Properties

18 Questions

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Electrical Resistance and Wire Properties

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Questions and Answers

What is the primary function of electromotive force in an electric circuit?

To transfer energy to an electric circuit per unit of electric charge (correct)

To reduce the resistance of a wire

To increase the electric field in a wire

To oppose the flow of electric charge

What is the minimum number of components required to create a complete circuit with a steady current?

One resistor

One electromotive force source (correct)

Two electromotive force sources and a resistor

One wire

A wire has a resistance of 0.0290 Ω. If the diameter of the wire is 2.05 mm, what material is the wire most likely made of?

Aluminum

Silver

Copper (correct)

Gold

If the current through a wire is 17.6 A, and the wire is 2.50 m in length and 0.654 mm in radius, what can be calculated?

The resistivity of the wire Signup and view all the answers

A gold wire has a diameter of 0.84 mm. If the electric field in the wire is known, what can be calculated?

The current carried by the wire Signup and view all the answers

If the resistance of a 24.0-m length of copper wire is known, what can be calculated?

The resistivity of the wire Signup and view all the answers

What is the primary function of devices such as batteries and generators?

To convert energy of other forms into electric potential energy Signup and view all the answers

What is the difference between electromotive force and potential difference?

Electromotive force is the energy received by 1 coulomb of charge, while potential difference is the energy used by 1 coulomb of charge Signup and view all the answers

What is the symbol used to represent electromotive force?

𝜀 Signup and view all the answers

What happens to the terminal voltage of a battery when current flows through it?

It decreases Signup and view all the answers

What is the internal resistance of a battery due to?

The chemicals within the battery Signup and view all the answers

What is the internal resistance of a generator due to?

The wires and other components of the generator Signup and view all the answers

What is the main advantage of electric circuits?

They allow energy to be transported without any moving parts Signup and view all the answers

What is the unit of electric current?

Ampere Signup and view all the answers

What is the direction of electric current defined as?

The direction of positive charge flow Signup and view all the answers

What is the mathematical formula for electric current?

I = Q/t Signup and view all the answers

What is an electric current?

A motion of charge from one region to another Signup and view all the answers

What are the charge carriers in a conductor?

Electrons Signup and view all the answers