Question

Describe how resistance affects the flow of current in a circuit.Responses Efficiency of a circuit is dependent on decreasing the resistivity of the material. Efficiency of a circuit is dependent on decreasing the resistivity of the material. Current in the circuit increases with increasing of the innate resistivity of the material. Current in the circuit increases with increasing of the innate resistivity of the material. Flow of electrons within the wire is increased by reducing the resistance by using a longer wire. Flow of electrons within the wire is increased by reducing the resistance by using a longer wire. The flow of current in a circuit is reduced by resistance from collisions of the electrons within the wire.
Answer
pick one
Answer
which is true
If the value of the current increases by a factor of 2, the resistance will decrease by a factor of 2.If the value of the current increases by a factor of 2, the resistance will decrease by a factor of 2.If the value of the current increases by a factor of 2, the resistance will decrease by a factor of 4.If the value of the current increases by a factor of 2, the resistance will decrease by a factor of 4.If the value of the current increases by a factor of 2, the resistance will increase by a factor of 2.If the value of the current increases by a factor of 2, the resistance will increase by a factor of 2.If the value of the current increases by a factor of 2, the resistance will increase by a factor of 4.
Answer
Which statement is true about electrical sources?ResponsesBatteries supply alternating current.Batteries supply alternating current.Electromagnetic induction supplies direct current.Electromagnetic induction supplies direct current.In the US, the main source of household electricity is from direct current.In the US, the main source of household electricity is from direct current.Alternating current is advantageous because it can travel longer distances
Answer
A major difference between AC and DC electricity is in its usefulness to effectively supply electricity to large groups. The best explanation for the difference is which of these statements?ResponsesDC current can be used in transformers while AC current cannot.DC current can be used in transformers while AC current cannot.AC current can be used in transformers while DC current cannotAC current can be used in transformers while DC current cannotAC current fluctuates too much to be used effectively in power generation.AC current fluctuates too much to be used effectively in power generation.DC current fluctuates too much to be used effectively in power generation.
Answer
Why might an electromagnet be used to pick up old cars in junk yards?ResponsesElectromagnets are expensive and easily create revenue.Electromagnets are expensive and easily create revenue.Electromagnets are powerful and can be turned on and off easily.Electromagnets are powerful and can be turned on and off easily.Electromagnets use high amounts of energy.Electromagnets use high amounts of energy.Electromagnets can only pick up light loads of scrap metal.
Answered by GPT 3.5
The higher the resistance in a circuit, the lower the flow of current. This is because resistance restricts the flow of electrons, causing them to collide with atoms in the material, which generates heat and reduces the overall current. Thus, resistance acts as an obstacle to the flow of current in a circuit, which can lead to overheating and inefficiencies in the system. To increase the flow of current, one would need to decrease the resistance in the circuit by using materials with lower resistivity or increasing the cross-sectional area of the wire to reduce collisions and allow for smoother electron flow.
Answered by GPT 3.5
The flow of current in a circuit is reduced by resistance from collisions of the electrons within the wire.
Answered by GPT 3.5
If the value of the current increases by a factor of 2, the resistance will decrease by a factor of 2.
Answered by GPT 3.5
Alternating current is advantageous because it can travel longer distances.
Answered by GPT 3.5
AC current can be used in transformers while DC current cannot.
Answered by GPT 3.5
Electromagnets are powerful and can be turned on and off easily.