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Questions and Answers
What happens to the resistance of a conductor if its length is doubled, keeping the area of cross-section constant?
What happens to the resistance of a conductor if its length is doubled, keeping the area of cross-section constant?
Which material property determines how well a material resists the flow of electric current?
Which material property determines how well a material resists the flow of electric current?
In which scenario would the resistance of a conductor increase?
In which scenario would the resistance of a conductor increase?
What effect does increasing the temperature have on the resistivity of most materials?
What effect does increasing the temperature have on the resistivity of most materials?
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What happens to the total resistance when resistors are connected in parallel?
What happens to the total resistance when resistors are connected in parallel?
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What is the relationship between voltage, current, and resistance in an electrical circuit?
What is the relationship between voltage, current, and resistance in an electrical circuit?
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What impurity atom can be doped into pure silicon to make it a p-type semiconductor?
What impurity atom can be doped into pure silicon to make it a p-type semiconductor?
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How can the electrical conductivity of pure germanium be increased?
How can the electrical conductivity of pure germanium be increased?
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What is the resistivity range of a semiconductor at room temperature?
What is the resistivity range of a semiconductor at room temperature?
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What is the forbidden energy gap between the valence band and the conduction band in a semiconductor?
What is the forbidden energy gap between the valence band and the conduction band in a semiconductor?
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What is the forbidden energy gap for germanium crystal at 0 K?
What is the forbidden energy gap for germanium crystal at 0 K?
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What is the temperature coefficient of resistance of a semiconductor?
What is the temperature coefficient of resistance of a semiconductor?
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What is the resistance of a wire if the slope of its 𝐼 − 𝑉 characteristic is 2 mA/volt?
What is the resistance of a wire if the slope of its 𝐼 − 𝑉 characteristic is 2 mA/volt?
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Which of the following is NOT a limitation of Ohm's law?
Which of the following is NOT a limitation of Ohm's law?
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What is the resistivity of a material if its resistance is 50 Ω and length is 10 m?
What is the resistivity of a material if its resistance is 50 Ω and length is 10 m?
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In an electric circuit, five cells with emf 4V and internal resistance 0.5 Ω are connected in series. What is the total emf of this combination?
In an electric circuit, five cells with emf 4V and internal resistance 0.5 Ω are connected in series. What is the total emf of this combination?
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When a wire's length increases by 20%, how does its resistance change?
When a wire's length increases by 20%, how does its resistance change?
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What are the characteristic features of a material suitable for fuse wires?
What are the characteristic features of a material suitable for fuse wires?
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