When equilibrium is reached in an electrochemical cell, the voltage reaches its maximum value. 1. false 2. true?
2 answers:
Answer: The given statement is false.
Explanation:
Voltage in an electrochemical cell helps in determining that the system is out of equilibrium.
When a redox reaction approaches towards equilibrium then there occurs flow of electrons with the advancement in chemical reaction. This means as the chemical reaction proceeds towards completion then flow of electrons also takes place.
Hence, cell potential decreases until the reaction reaches at equilibrium where, = 0.
Also, . So, at equilibrium voltage becomes equal to zero and current also stops.
Thus, we can conclude that the statement when equilibrium is reached in an electrochemical cell, the voltage reaches its maximum value is false.
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Answer:
Explanation:
The electric field equation of a electromagnetic wave is given by:
(1)
- E(max) is the maximun value of E, it means the amplitude of the wave.
- k is the wave number
- ω is the angular frequency
We know that the wave length is λ = 700 nm and the peak electric field magnitude of 3.5 V/m, this value is correspond a E(max).
By definition:
And the relation between λ and f is:
The angular frequency equation is:
Therefore, the E equation, suing (1), will be:
(2)
For the magnetic field we have the next equation:
(3)
It is the same as E. Here we just need to find B(max).
We can use this equation:
Putting this in (3), finally we will have:
(4)
I hope it helps you!