A $$N-type$$ silicon sample of width $$2$$×$$10$$−$$3m$$, thickness and length $$3$$×$$10$$−$$2m$$ carries a current of $$2.4mA$$, when the voltage is applied across the length of the sample. The free electron density is $$1022m-3$$. Select which one of them is incorrect

Question

A $$N-type$$ silicon sample of width $$2$$×$$10$$−$$3m$$, thickness and length $$3$$×$$10$$−$$2m$$  carries a current of $$2.4mA$$, when the voltage is applied across the length of the sample.  The free electron density is $$1022m-3$$. Select which one of them is incorrect

Infinity Learn · Accepted Answer

Current density  $$=$$ $$iA=2.4$$×$$10$$−$$32$$×$$10$$−$$3$$×$$3$$×$$10$$−$$2=40$$ $$A/m2$$ Drift speed  $$=$$ $$Vd=iAne=401022$$×$$1.6$$×$$10$$−$$19=2.5$$×$$10$$−$$2m/s=2.5cm/sTime$$  $$=t=lVd=3$$×$$10$$−$$22.5$$×$$10$$−$$2=1.2$$ $$sec$$

A N-type silicon sample of width $2 \times 10^{- 3} m$ , thickness and length $3 \times 10^{- 2} m$ carries a current of 2.4mA, when the voltage is applied across the length of the sample. The free electron density is $10^{22} m^{- 3}$ . Select which one of them is incorrect

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A N-type silicon sample of width 2×10−3m, thickness and length 3×10−2m carries a current of 2.4mA, when the voltage is applied across the length of the sample. The free electron density is 1022m-3. Select which one of them is incorrect

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A N-type silicon sample of width $2 \times 10^{- 3} m$ , thickness and length $3 \times 10^{- 2} m$ carries a current of 2.4mA, when the voltage is applied across the length of the sample. The free electron density is $10^{22} m^{- 3}$ . Select which one of them is incorrect