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A cylindrical metal wire of radius r1 and conductivity of o1 has a core region of radius r2 replaced along the whole length with a metal conductivity of o2. Calculate the resistance of the wire, R, between the ends.
1. What is the purpose of core in hollow solder wire 2. What is tinning, and why is it important 3. Why is safety so important when soldering 4. Why has lead-free solder replaced lead-based solder. Be sure to properly cite any sources of information.
Assume that one of the pumps uses a1/4hp DC shunt motor with an input voltage of 115VDC that pulls 1.6A running at 1500 rpm. The filed resistance for the motor is 600 ohms and the armature resistance is 8.5 ohms. Find the constant KT for the motor..
Using SR Flip-flops and NAND gates, design a system that outputs 1 if it takes an even number of clock cycles to recognize the pattern 11-0-101. Otherwise it outputs 0.
Two dc motors are compared. the first one is a 4hp dc motor which draws a current or 0.7A when the field is connected to a 150V source. the second, a 600 hp motor draws a field current of 5A when the field is connected to a 300V dc source.
(a) Determine a unit vector in the direction of Q at P(1, 2, 1) (b) Find the component of Q at P in the direction of PT where T is point (5, 3, -4) (c) Where is Q the same as the unit vector of \(a_{x}+11a_{y}+10a_{z}\)
A coil made of 150 turns of copper wire wounded ona cylindrical coil . If that means radius of the turns in 6.5mm and the diameter of the wire is 0.4mm, calculate the resistance of the coil.
Note that after a collision, the expected numbers are slightly different in two systems, but the difference is unimportant since collisions are rare.
Using MultiSim (I am somewhat familiar with this program), connect the circuit drawn in Step 1 using AND gates, NOR gates, and inverters. Connect a logic switch to each input and an LED monitor to the output.
A sensitive IC (integrated circuit) on a circuit board is located 1m from a long power line carrying 10A. The power line generates a magnetic field. You can place a trace on a circuit board with current running parallel to the power line to cancel..
1) Which has greater efficiency DC Machine operating as MOTOR or GENERATOR 2) What happens when an AC supply is given to a DC Machine
A computer has 16-bit instructions and 64 registers. Suppose it is required to have at least 14 instructions designed to have 2 operands from registers (e.g., add, $1, $3 puts the sum of $1 and $3 into $1.
A circle touches the x axis and also touches another fixed circle with center (0,3) and radius = 2 units. What is the locus of the center of the (first) circle
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