While taking photographs in Death Valley on a day when the temperature is 62.0

Expert Solution

Resistance at 20 deg c = Ro

Resistance at 62 deg c, R1 = Ro [ 1 + ? ?t ]

= Ro [ 1 + ? ( 62 - 20 ) ]

= Ro [ 1 + 42 ? ]

Resistance at - 88 deg c, R2 = Ro [ 1 + ? ( - 88 - 20 ) ]

= Ro [ 1 - 108 ? ]

According to ohms law, I ? ( 1 / R )

I2 / I1 = R1 / R2

I2 / I1 = ( 1 + 42 ? ) / ( 1 - 108 ? )

I2 / I1 = ( 1 + 42 * 0.0039 ) / ( 1 - 108 * 0.0039 )

I2 / I1 = 1.1638 / 0.5788

I2 = 1.3 * ( 1.1638 / 0.5788 )

= 2.61 A

genius_generous answered 2 months ago

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