resistance is given by
is resistivity which is a property of material
A is cross section area
L is length
We can see that is length(L) is made half i.e L/2
Resistance also becomes half i.e R/2
A cylindrical copper rod has resistance R. If it is cut to half of its original...
A cylindrical wire has a resistance r and resistivity p if its length and diameter are both cut in half what will be its resistance? What will be its resistivity?
.A cylindrical metal rod has a resistance R. A second rod that is made of the same material has (1 potnt) triple the length and triple the diameter of the first rod. What is the resistance of the second rod? OR O3R O9R 4. Which material has the highest resistivity? (l point) O glass O steel Olead Onichrome alloy
a piece of copper wire of resistance R is cut into 10 equal lengths. These parts are connected in parallel. How does the joint resistance of the parallel combination compare with the original resistance of the single wire? The circuits, P and Q, show two different ammeter-voltmeter methods of measuring resistance. Suppose the ammeter has a resistance of 0.10 ohms and the voltmeter of 3.0 ohms; the ammeter reads 2.5 amps and the voltmeter reads 6.0 volts. What is the...
4. A copper wire of resistance 16 12 is cut into four equal pieces that are then placed together side by side to form a new cable with a length equal to 1/4 the original length. What is the resistance of this new cable? a) 16 22 b) 122 c) 422 d) 16/9 22 e) none
A copper rod has a resistance 6.96 LaTeX: \Omega Ω . When a voltage of 2.3 volts is applied across the copper rod. What is the electric current (in unit of amp) running through the rod?
P-11.1. We quantify Fourier's experiment, shown in Fig. 11.3, for a cylindrical copper rod of a length 1.2 Cross-sectional area 4.8 cm The rod is insulated to prevent heat loss through its surface. A temperature dif ference of 100 K is maintained between the ends. Find the rate at which heat is conducted through the rod m and a
The cylindrical rod with a diameter d=1 mm is made from copper (29 65Cu). The density of the copper is 8900 kg/m3. Find the average drifting velocity of electrons in the rood, if the current in 1 A flows through the rod
A wire of length L and radius r has a resistance R. If the length and radius of this wire are doubled, the new resistance: remains the same. doubles. quadrables. drops to 1/2 its original value. drops to 1/4 its original value.
The cost ($C) of making a cylindrical rod varies jointly as the square of its base radius (r cm) and its height (h cm). It cost $50 to make a cylindrical rod of base radius of 2 cm and a height of 5 cm. A.) write an equation involving Cost, radius and height of the cylindrical rod and use it to find the constant of variation. B.) what will be the radius of the cylindrical rod if the height of...
A piece of wire has a resistance R. It is cut into two pieces of equal length, and the pieces are twisted together parallel to each other. Part A What is the ratio of the resistance of the resulting wire to R?