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Find the conductance of each of the resistances- 0.086O , 4 k O and 2.2 MO.
The conductance of a wire is 100 S. If the area of the wire is increased by 2/3 and the length is reduced by the same amount.
Does the thermistor have a positive or a negative temperature coefficient?
Is the coefficient a fixed value for the range 0.1 to 1000 foot-candles? Why?
Compare the ratio of maximum to minimum current levels above to the corresponding ratio of voltage levels.
What is the resistance of a copper bus-bar, as used in the power distribution panel of a high-rise office building.
If the resistance of an aluminum wire at room temperature (20°C) is 100 m O (measured by a milliohmmeter).
Derive the conversion factor between r (CM·O/ft) and r (·cm) by
Determine the change in resistance for each 10° change in temperature between room temperature and 212°F.
If the resistance of a 1000-ft length of copper wire is 10 Oat room temperature (20°C), what will its resistance be at 50 K (Kelvin units) using Eq.
Find the temperature at which the resistance of a copper conductor will increase to 1 from a level of 0.8 at 20°C
Determine the PPM rating of the 10-kO carbon composition resistor of Fig. using the resistance level determined at 90°C.
Between two points in an electric circuit, a voltmeter reads 12.5 V for a period of 20 s.
Calculate the area in circular mils (CM) of wires having the diameters 0.050 in, 0.016 in.
What is the diameter of each wire in inches?
What is the area in circular mils of a copper wire that has a resistance of 2.5 Oand is 300 ft long (T 20°C)?
Without working out the numerical solution, determine which section would appear to have the most resistance. Explain.
Without working out the numerical solution, determine whether the resistance of the bar will increase or decrease with an increase.
A standard 12-V car battery has an ampere-hour rating of 40 Ah, whereas a heavy-duty battery has a rating of 60 Ah.
Determine the available energy (in joules) from the Eveready battery of Figure.
A portable television using a 12-V, 3-Ah rechargeable battery can operate for a period of about 5.5 h.
Two charged bodies, Q1 and Q2, when separated by a distance of 2 m, experience a force of repulsion equal to 1.8 N.
The numbers of orbiting electrons in aluminum and silver are 13 and 47, respectively.
Find the force of attraction between a proton and an electron separated by a distance equal to the radius of the smallest orbit .
Find the force of repulsion in new tons between Q1 and Q2 in Fig.