Which of the following will have the lowest resistance?
ammeter
Which of the following wires has the highest resistance?
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.
Which of the following will have higher resistance?
More concentrated the solution, more will be the resistance of electrolyte and consequently less will be the conductance. Here, 2N-NaCl is the most concentrated solution, hence, its resistance will be the highest.
Which of the wire has maximum resistance and why?
Wire C has maximum resistance because it has maximum length, least thickness and highest resistivity.
Which copper wire has the smallest resistance?
(b) The ranking by resistance goes as 3 > 1 > 2. 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.
In which wire of same material Maximum current would flow * 1 point thin and long wire thick and short wire thin and short wire thick and long wire?
The current will flow more easily through the thick wire than the thin wire. It is because the resistance of a conductor is inversely proportional to its area of cross-section. If the thicker the wire, the less is resistance and hence more easily the current flows.
Which has more resistivity a thick or thin wire of same material and why?
Resistivity depends on the nature of the substance and temperature. It does not depend on the dimensions, so resistivity of both is same. However the resistance of the thin wire will be more than that of the thick wire.
Which has more resistivity a thick or thin wire of same material when connected to the same source?
The current will flow more easily through a thick wire than through a thin wire of the same material when connected to the same source. A thick wire has a greater diameter and hence lesser resistance making the current to flow through it more easily.
How does the resistance of a conductor depend on?
The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity. It is important to note that electrical conductivity and resistivity are inversely proportional, meaning that the more conductive something is the less resistive it is.
Why do some appliances need thicker wire?
The thinner the wire (smaller cross-sectional area), the higher the resistance of the cable which brings the current into the electrical appliances. So it is advisable to have thicker cables for high power electrical appliance as thicker cables have lower resistance.
Why does the current flow easily through a thin wire?
Resistance is inversely proportional to Area of cross-section. A thin wire would have small area of cross section, hence more resistance. Hence, current would flow more easily in a thick wire.
When an electric current flows through a thin copper wire the wire?
Answer: When current flows through a conductor such as a copper wire, all of those electrons that were previously moving about randomly get together and start moving in the same direction. A very interesting effect then happens: The electrons transfer their electromagnetic force through the wire almost instantaneously.