Question: How Does The Resistance Of A Wire Depend On Its Diameter?

How does the resistance of a wire depend on its dimensions?

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area.

Resistance also depends on the material of the conductor.

The resistance of a conductor, or circuit element, generally increases with increasing temperature..

Does a thicker wire have more resistance?

A thicker wire simply has more ‘lanes’ on the go at once. A higher current for a given voltage means a lower resistance. The thicker wire in (4) has a lower resistance than the thinner wire in (3). The resistance of a wire decreases with increasing thickness.

How do you calculate resistance from cable length?

Learning Electrical EngineeringHence R = 22.5/10 = 2.25 Ohms per km.Length of conductor = 500m =500/1000 = 0.5km.Therefore resistance of copper conductor = 2.25 x 0.5 =1.125 Ohms. Similarly for Aluminium, … R = 36/S(c.s.a)Again S = 10mmsq.Hence R = 36/10 = 3.6 Ohms per km.Length of conductor = 0.5km.

How will the resistance of a wire change if its diameter is doubled its length remaining the same?

How will the resistance of a wire change when: (i) its length is doubled. … (ii)When diameter is doubled,the area of the wire becomes 4 times the original area. Hence new resistance becomes 1/4th of original R;since R is inversely related to the area A.

How does resistance of a wire change with length?

First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. … In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge.

What type of wire has the least resistance?

short wireA short wire has a lower resistance than a long one*. Resistance is directly proportional to the length of the path through which current flows: R ∝ L. This means the longer the wire, the more resistance.

Does length of wire affect current?

As the length increases, resistance increases, as a result current decreases. Length of wire definitely have effect on current and voltage.. Resistance is directly proportional to length. As the length increases, resistance increases, as a result current decreases.

How does the resistance of a wire depend on its radius?

Answer. The resistance of any conductor is directly proportional to the length of conductor and is inversely to its area of cross section. From this we can conclude that resistance of wire is inversely proportional to the square of radius.

What happens to the current in a circuit if its resistance is doubled?

The current is directly proportional to the voltage and inversely proportional to the resistance. … So doubling or tripling the resistance will cause the current to be one-half or one-third the original value.

What type of wire has the most resistance?

NichromeTypes. Nichrome, a non-magnetic 80/20 alloy of nickel and chromium, is the most common resistance wire for heating purposes because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.

How does the resistance of a metallic wire depends on its temperature explain with reason?

With the increase in temperature of conductor, both the random motion of electrons and the amplitude of vibration of fixed positive ions increase. As a result, the number of collisions increases. Hence, the resistance of a conductor increases with the increase in its temperature.

What are the factors affecting the resistance of a wire?

There are 4 different factors which affect resistance:The type of material of which the resistor is made.The length of the resistor.The thickness of the resistor.The temperature of the conductor.

Does diameter affect resistance?

Resistance is inversly proportional to the diameter of the of cross section section of a conductor . Because when diameter will large then the area of cross section will large and electrons can move more freely hence the resistance wiil reduce .

Which wire has more resistance thick or thin?

The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current. The relationship between resistance and the area of the cross section of a wire is inversely proportional .