physics
posted by tom .
A piece of copper is made into a rod with a square crosssection. The side of the square is 2.00 centimeters. The resistivity of copper is 1.7 \cdot 10^{8} \Omega\cdot {\rm m}. An unknown electric field E, directed along the rod, creates a current of 12.0 amperes through the rod. Find the magnitude of E.
Respond to this Question
Similar Questions

Physics E&M
A slab of metal of volume V is made into a rod of length L. The rod carries current I when the electric field inside is E.Find the resistivity of the metal? 
physics
An 8m long copper wire with a crosssectional area of 1.0 x 10^4 m^2, in the sshape of square loop, is connected to a .10V battery. If the loop is placed in a uniform magnetic field of magnitude .4T, what is the maximum torque that … 
physics
Determine the elongation of the rod in if it is under a tension of 5.7E10^3 N. The rod is made of aluminum and copper. From the aluminum to the copper section it measures 1.3m and from the copper section to the end it measures 2.6m … 
physics
Determine the elongation of the rod in if it is under a tension of 5.7E10^3 N. The rod is made of aluminum and copper. From the aluminum to the copper section it measures 1.3m and from the copper section to the end it measures 2.6m … 
PHYSICS
Two metal rods  one copper the other aluminum  are connected in series, as shown in the figure below. Note that each rod is 0.525 m in length, and has a square cross section 1.25 cm on a side. The temperature at the copper end … 
Physics
A copper wire is 7.00 m long and has a crosssectional area of 1.00 104 m2. This wire forms a one turn loop in the shape of a square and is then connected to a battery that applies a potential difference of 0.200 V. If the loop is … 
physics
An ice cube at 0°C measures 14.1 cm on a side. It sits on top of a copper block with a square cross section 14.1 cm on a side and a length of 18.9 cm. The block is partially immersed in a large pool of water at 89.3°C. How long does … 
Math
Find the largest $n$ so that $f(2) \cdot f(3) \cdot f(4) \cdots f(n1) \cdot f(n) < 1.98.$ 
Physics
A material is formed into a long rod with a square cross section 0.31 cm on each side. When a 100 V voltage is applied across a 16 m length of the rod, a 4.6 A current is carried. What is the resistivity of the material? 
Physics
a uniform magnetic field of strength 0.5T is directed at an angle of 30degree to the plane of 100turns regular copper coil of lenght 0.04m and width 0.05mm. the diameter of the copper wire which makes up a coil is 1mm and the resistivity …