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A Level Physics Practice Test: Resistance and Resistivity
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Resistance and resistivity are both properties of materials and components that relate to the flow of electric current.  Resistance is a characteristic of a wire or component that measures how difficult it is to pass current through it. Resistivity is a characteristic of the material used to make the wire or component.  Resistance is directly proportional to the length and temperature of the conductor, and inversely proportional to the cross-sectional area of the material. Resistivity increases linearly with temperature.  The SI unit of resistance is the ohm, and the SI unit of resistivity... Show more
A Level Physics Practice Test: Resistance and Resistivity
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17 Questions

1. If the connectio ns across the resistor are reversed, then graph between current and potential difference is
2. Threshold voltage at which LED emits light is
3. Resistivity is measured in
4. In semiconductors upon increasing temperature, conductivity
5. Component which obeys ohm's law is called
6. Component which obeys ohm's law is called
7. At constant temperature, resistance and cross-sectional area are
8. If current and potential difference are directly related then object follows
9. At constant temperature, resistance and cross-sectional area are
10. Resistivity of lead is
11. In NTC thermistor on increasing temperature, the resistance
12. Resistivity of lead is
13. At threshold voltage, resistance of diode
14. Resistance of a particular wire depends upon
15. In NTC thermistor on increasing temperature, the resistance
16. If current and potential difference are directly related then object follows
17. At threshold voltage, resistance of diode

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