In the I-V curve of a solar cell, what does the open-circuit voltage (Voc) represent ?
The maximum voltage the cell can generate under illumination
The maximum voltage the cell can generate under illumination option is correct.
The open-circuit voltage \(V_{oc}\) of a solar cell is the terminal voltage measured when no current is drawn (external load an open circuit). Under illumination the photo-generated current \(I_L\) forward-biases the p–n junction until the diode injection current exactly cancels the light-generated current, and no net current flows.
Setting the net current to zero in the ideal one-diode model gives \(V_{oc} = \dfrac{nkT}{q}\ln\left(\dfrac{I_L}{I_0}+1\right)\), which is the largest voltage the cell can develop under a given illumination because any current drawn from the cell reduces the terminal voltage.
In the dark \(I_L=0\) so \(V_{oc}=0\). At the maximum-power point the voltage \(V_{mp}\) is strictly less than \(V_{oc}\) because both current and voltage are non-zero there. Zero-current does describe \(V_{oc}\), but the primary physical significance is that it is the maximum available voltage under light.
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Important Questions from Mixed Topic (MH-SET)
.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
Codes:
Which of the following are referred to as low level language?
(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
Which part of the QR code represents the encoded data?
