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Magazine Problem 33
Assume that a certain piece of material has a resistance of 4 ohms. Determine the new resistance if the resistivity is doubled and no other parameters are changed.
Problem 34
Assume that a certain piece of material has a resistance of \(10 \mathrm{k}\) ohms. Determine the new resistance if the length, width and height of the piece are all halved.
Problem 35
A certain material has a resistivity of 100 ohm-centimeters. Determine the resistance of a piece that is \(1 \mathrm{~cm}\) wide, \(0.5 \mathrm{~cm}\) high and \(6 \mathrm{~cm}\) long.
Problem 36
A certain material has a resistivity of 2000 ohm-centimeters. Determine the resistance of a piece that is \(2 \mathrm{~mm}\) wide, \(4 \mathrm{~mm}\) high and \(10 \mathrm{~mm}\) long.
Problem 37
A 40 ohm resistor has dimension of \(0.4 \mathrm{~cm}\) wide by \(0.2 \mathrm{~cm}\) high by \(1 \mathrm{~cm}\) long. Determine the resistivity in ohm- centimeters.
Problem 38
A 5000 ohm resistor has dimension of \(5 \mathrm{~mm}\) wide by \(3 \mathrm{~mm}\) high by \(6 \mathrm{~mm}\) long. Determine the resistivity in ohm-centimeters.
Problem 39
A resistor with the color code yellow-violet-red-silver has a measured value of 4806 ohms. Is this resistor within tolerance? As a percentage, how far is it from the nominal value?
Problem 40
A resistor with the color code orange-orange-yellow-gold has a measured value of \(33.9 \mathrm{k}\) ohms. Is this resistor within tolerance? As a percentage, how far is it from the nominal value?
Problem 41
A resistor with the color code brown-black-orange-silver has a measured value of 9980 ohms. Is this resistor within tolerance? As a percentage, how far is it from the nominal value?
Problem 42
A resistor with the color code green-blue-black-gold has a measured value of 50 ohms. Is this resistor within tolerance? As a percentage, how far is it from the nominal value?
