Thermistors are usually made of

Important Questions on Current Electricity

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IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 41

Materials used in wire bound resistors are:

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Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 42

Which one of the following material is not used in wire-bound resistors?

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Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 43

Which of the following statement is not true about carbon resistors?

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Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 44

Which of the following is a semiconductor?

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Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 45

A thermistor is dipped in a bath whose temperature is to be measured. When the temperature increases, the current also increases because of decrease in

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Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 46

For a metallic wire, the ratio $V/I (V=$applied potential difference and $I=$current flowing),

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Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 47

The temperature co-efficient of resistance of a wire is $0.00125 °\mathrm{C}$ . At $300\mathrm{ }\mathrm{K}$, its resistance is $1 \mathrm{\Omega }$. The resistance of the wire will be $2 \mathrm{\Omega }$ at,

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Achieve CUET (UG) Physics Practice Book>Chapter 3 - Current Electricity>Exercise>Q 48

The temperature coefficient of resistivity of a material is $4\mathrm{ }\times \mathrm{ }{10}^{–4} {\mathrm{K}}^{-1}$. When the temperature of the material is increased by $50 °\mathrm{C}$, its resistivity increases by $2\mathrm{ }\times \mathrm{ }{10}^{–8}\mathrm{ }\mathrm{\Omega } \mathrm{m}$. The initial resistivity of material (in $\mathrm{\Omega } \mathrm{m}$) is,