18 Questions
What is the primary function of electromotive force in an electric circuit?
To transfer energy to an electric circuit per unit of electric charge
What is the minimum number of components required to create a complete circuit with a steady current?
One electromotive force source
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?
Copper
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
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
If the resistance of a 24.0-m length of copper wire is known, what can be calculated?
The resistivity of the wire
What is the primary function of devices such as batteries and generators?
To convert energy of other forms into electric potential energy
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
What is the symbol used to represent electromotive force?
𝜀
What happens to the terminal voltage of a battery when current flows through it?
It decreases
What is the internal resistance of a battery due to?
The chemicals within the battery
What is the internal resistance of a generator due to?
The wires and other components of the generator
What is the main advantage of electric circuits?
They allow energy to be transported without any moving parts
What is the unit of electric current?
Ampere
What is the direction of electric current defined as?
The direction of positive charge flow
What is the mathematical formula for electric current?
I = Q/t
What is an electric current?
A motion of charge from one region to another
What are the charge carriers in a conductor?
Electrons
Quiz about electrical resistance, wire properties and calculations. Calculate resistance, potential difference and wire materials. Multiple problems with varying wire lengths, diameters and materials.
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