Physics: Light from the sun allows a solar cell to move electrons from the positive to the negative terminal, doing 2.4×10−19 j of work per electron. what is the emf of this solar cell?

Light from the sun allows a solar cell to move - id3395464, brendacauani12345

toya96

07.01.2022

The emf of the cell will be 1.5 volt

Explanation:

We have given work done $=2.4\times 10^{-19}j$

Charge on electron that is q , $e=1.6\times 10^{-19}C$

Energy of electron is given by Energy=qV , here e is charge on electron and V is emf

$2.4\times 10^{-19}=1.6\times 10^{-19}V$

V = 1.5 Volt , that is emf of the cell

So the emf of the cell will be 1.5 volt

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adeline12401

23.01.2022

we are to use the law of momentum

where by total momentum before collision is equal to total momentum after collision hence m1u1+m2u2 =V(M1+M2)

(3200×40)+(2000×30)=V(3200+2000)

128000+60000=V(5200)

188000=5200V

188000÷5200=5200V÷5200

V=36.154m/s

Explanation:

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