Which Of The Following Instrument Has Lowest Resistance? - Fixanswer

Pure silver is the best conductor of electricity, then copper, and then aluminum. Silver is the best conductor because it has the least resistance to the flow of electricity.

What wire has the smallest resistance?

Resistance increases as length increases and cross- sectional area decreases, so case 3, with the longest length and smallest cross-sectional area, has the largest resistance. Case 2 has the smallest resistance because it has the smallest length and the largest area.

What is the resistance of ideal ammeter?

An ideal ammeter is an ammeter whose resistance is zero thus giving the user zero error in measurement. Practically there is no such conductor whose resistance is zero.

Which one has the lowest and which one has the highest resistance?

Assertion : Out of galvanometer, ammeter and voltmeter , resistance of ammeter is lowest and resistance of voltmeter is highest.

What is the material’s resistance?

We know that resistance is a property that resists the flow of electrons . If the material has high resistance, then it resists the flow of electrons. ... If the material has high resistance, then the electrons will smoothly flow through the material.

What affects a material’s resistance?

How much resistance a material has depends on several factors: the type of material, its width, its length, and its temperature . All materials have some resistance, but certain materials resist the flow of electric current more or less than other materials do. ... A longer wire has more resistance than a shorter wire.

Which is less in a conductor that carries a current?

In a conductor that carries a current, which is less, the drift speed of an electron or the average speed of the electron between collisions? The drift speed of an electron is less than the average speed of the electron between collisions.

Which is directly proportional to the resistance?

The resistance of any conductor is directly proportional to length and inversely proportional to area of cross-section of the substance. As value of resistance(R) is directly proportional to length of resistance, so by increasing the length of resistance the value of resistance increases.

Does rubber have less resistance?

Materials that have high resistance to electric current are called electric insulators. Wood, rubber, and plastic are good electric insulators. When more than one material is available for electric current to flow through, the current always travels through the material with the least resistance .

How do I calculate resistance?

If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I . For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance R _T = 9 volts / 3 amps = 3 Ω.

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 .

What is the resistance of a wire?

The ohm is the common unit of electrical resistance, equivalent to one volt per ampere and represented by the capital Greek letter omega, Ω. The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area .

Do hot or cold wires have more resistance?

Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance . This is illustrated in the tutorial above. ... As the wire cools, resistance decreases and current flow resumes, allowing the lamp to relight.