Electric Circuits: Analyzing Current Changes w/ Variable Potential Difference

In summary, the conversation is discussing the behavior of current in a resistance wire as the potential difference across it is steadily increased. The ratio of potential difference to current remains constant as long as the temperature stays the same, which is in accordance with Ohm's law (V=IR). The person is seeking clarification on the concept and the explanation given in class.
  • #1
Twoacross
9
0

Homework Statement



A source of variable potiential difference is attached across the ends of 1.0 m of resistance wire and the potiential difference across the wire is steadily increased. Describe how the current through the wire changes and provided that the temperature stays the same, what ratio is constant as the potiential difference across the wire increases?


Homework Equations





The Attempt at a Solution



Im going over all my notes, and this seemed to be the part which i don't understand clearly. This not a question but more of an explanation we did in class. If someone could explain it, it be greatly appreciated, just the wording is kind of confusing for me

Thank you!
 
Physics news on Phys.org
  • #2
Really it's asking about Ohm's law, V=IR. If R is fixed, and you increase V, what has to happen to I?
 

1. What is an electric circuit?

An electric circuit is a closed loop through which electric current can flow. It is made up of various components such as a power source, conductors, and resistors.

2. What is current and how is it measured?

Current is the flow of electric charge through a circuit. It is measured in amperes (A) using a device called an ammeter.

3. What is potential difference and how is it related to current?

Potential difference, also known as voltage, is the difference in electric potential between two points in a circuit. It is measured in volts (V) and is related to current by Ohm's Law, which states that current is directly proportional to potential difference and inversely proportional to resistance.

4. How do changes in potential difference affect current in a circuit?

Changes in potential difference can affect the flow of current in a circuit. An increase in potential difference will result in an increase in current, while a decrease in potential difference will result in a decrease in current.

5. How can variable potential difference be analyzed in an electric circuit?

Variable potential difference can be analyzed by using a voltmeter to measure the potential difference at different points in the circuit. This data can then be used to plot a graph and analyze the relationship between potential difference and current.

Similar threads

Circuit with potential difference across battery being zero?
    • Introductory Physics Homework Help
Replies
3
Views
250
Why do the headlights on the car become dim when the car is starting?
    • Introductory Physics Homework Help
Replies
4
Views
263
Potential difference between 2 points in a capacitor circuit
    • Introductory Physics Homework Help
Replies
30
Views
1K
Current Flow Through Lamps in Circuits
    • Introductory Physics Homework Help
Replies
9
Views
967
Differences in the Brightness of bulbs for 2 separate circuits
    • Introductory Physics Homework Help
Replies
1
Views
1K
Will any charge flow through the circuit?
    • Introductory Physics Homework Help
2
Replies
36
Views
3K
Changing capacitance effect on ripple in full rectification circuit
    • Introductory Physics Homework Help
Replies
4
Views
1K
Current direction after changing inductor to short circuit
    • Introductory Physics Homework Help
Replies
2
Views
1K
Single Loop Potential difference -- sign issue
    • Introductory Physics Homework Help
Replies
8
Views
704
Final potential difference of a 2 capacitor system
    • Introductory Physics Homework Help
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top