Table of Contents
What changes would cause an increase in the resistance of a wire?
Answer: Resistance can increase relative to Temperature, Nature of Material, Length of Conductor or wire.,and Cross-section area.
What are the two factors that influence resistance the two factors are?
There are several factors that affect the resistance of a conductor;
- material, eg copper, has lower resistance than steel.
- length – longer wires have greater resistance.
- thickness – smaller diameter wires have greater resistance.
- temperature – heating a wire increases its resistance.
Which change will cause an increase in the resistance of conductivity?
An increase in temperature of the copper wire will cause an increase in the resistance of the copper wire, and will thereby reduce conductivity, which is the flow of electric current through the wire.
What can cause high resistance in a circuit?
Resistance measurements are normally taken to indicate the condition of a component or a circuit. The higher the resistance, the lower the current flow. If abnormally high, one possible cause (among many) could be damaged conductors due to burning or corrosion.
Which common factor affects both resistance and resistivity and how?
Answer
- The answer to the question is temperature which is the common factor between resistance and resistivity.
- EXPLANATION:
- Mathematically it can be written as.
- Hence, the common factor which is same for resistance and resistivity is temperature.
How does the resistance of a wire vary with its length?
Resistance is directly proportional to the length and inversely proportional to the area of cross section.
What makes up the resistance of a wire?
A wire’s resistance depends on four main factors: 1 Resistivity 2 Length of the wire 3 Cross-sectional area 4 Temperature of the wire More
Can a 2 wire connection have no resistance?
The above picture is using a 2-wire connection, as there are only two wires (test leads) being used to connect the resistance. In the above picture, the wires are ideal with no resistance in them. But in practice, all wires and test leads have some resistance and the contacts will always have resistance too.
Why does doubling the length of a wire increase the resistance?
Furthermore, the resistance of a wire is directly proportional to the length and inversely proportional to the area, so doubling the length of a wire should increase the resistance by a factor of two. This is because if the length of the wire is doubled, the electrons bump into twice as many atoms, so there will be twice as much resistance.
What causes the resistance of an electric current?
There are many causes of resistance, corrosion, temperature, too small a wire etc. However, a basic answer is that as an electric current flows through a conductive material, it meets atoms of the material through which it is flowing.