The temperature dependence of resistances of Cu and undoped Si in the temperature range 300

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Q:8

The temperature dependence of resistances of Cu and undoped Si in the temperature range 300–400 K, is best described by

Linear increase for Cu, exponential increase for Si

Linear increase for Cu, exponential decrease for Si

Linear decrease for Cu, linear decrease for Si

Linear increase for Cu, linear increase for Si

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A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be

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