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, is kept at 20 ch has length 4, is kept at 2.

, is kept at 20 ch has length 4, is kept at 2.

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Consider two cylindirical wires made up of iron. The first wire which has length L and cross- sectional area A, is kept at 20 Degrees Celcius. The second wire which has length L and cross- sectional area 2A, is kept at 220 Degrees Celcius. The same potential V is applied to these wires. If the current on the first wire is I1 , and the current on the second wire is I2, which of the following is correct? (Resistivity of iron: p = 9.7 x 10-Qm, Temperature coefficient: a = 0.005(°C)-! ) a. I = 0.312 b. I = 0.512 %3D c. I = I2 d. I = 212 e. I = 20012
Transcribed Image Text:Consider two cylindirical wires made up of iron. The first wire which has length L and cross- sectional area A, is kept at 20 Degrees Celcius. The second wire which has length L and cross- sectional area 2A, is kept at 220 Degrees Celcius. The same potential V is applied to these wires. If the current on the first wire is I1 , and the current on the second wire is I2, which of the following is correct? (Resistivity of iron: p = 9.7 x 10-Qm, Temperature coefficient: a = 0.005(°C)-! ) a. I = 0.312 b. I = 0.512 %3D c. I = I2 d. I = 212 e. I = 20012
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