27. Resistors & DC Circuits

Resistors and Ohm's Law

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In a simple circuit with a fixed applied voltage $V$ , how does increasing the resistance $R$ affect the electric current $I$ according to Ohm’s law?
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In the context of resistors and Ohm's law, what SI unit is used to measure electrical resistance?
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In the context of resistors and Ohm's law, which symbol and SI unit are used to represent electrical resistance?
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Two resistors are made of the same material, one twice as long as the other. If the current through the shorter resistor is 5 A, what is the current through the longer resistor if they both have the same potential difference and cross-sectional area?
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According to Ohm's Law, how many ohms of resistance will allow a current of $1 A$ to flow when a voltage of $1 V$ is applied across a resistor?
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Which of the following is one function of a resistor in a circuit?
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According to Ohm's Law, what is the relationship between the current and the voltage across a resistor in a circuit?
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In a cylindrical resistor, what is the effect on the resistance if the radius of the vessel is halved, assuming the length and material remain constant? (The resistance $R$ of a cylinder is given by $R = ρ \frac{l}{π r^{2}}$ , where $ρ$ is resistivity, $l$ is length, and $r$ is radius.)
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Which of the following best describes Ohm's Law?
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In a circuit, a resistor has resistance $R$ and the current through it is $I$ . According to Ohm’s law, how do you calculate the voltage drop across the resistor?
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Which of the following is the SI unit for electrical resistance?
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In a simple electric circuit, which component is specifically designed to provide resistance and oppose the flow of current?
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If a resistor has the color bands green, blue, brown, and gold, what is its resistance and tolerance?
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A resistor has a current through it of 5 A. If the EMF across the resistor is 10 V, what is the resistance of this resistor?
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A certain wire has length L and radius r, and a resistance of R. That wire is melted down and the same volume of the same metal is used to produce a wire with length 2L. What is the resistance of the resulting wire?
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