Advertisements
Advertisements
Question
Conceptual question.
Does a solar cell always maintain the potential across its terminals constant? Discuss
Advertisements
Solution
A solar cell does not always maintain a constant potential difference across its terminals.
Its voltage depends on the intensity of sunlight, temperature, and the load connected to it. In strong light and with a light load, the terminal voltage is high. When the light intensity decreases or when a heavy load is connected, the voltage drops. Thus, unlike a battery, a solar cell cannot maintain a constant potential difference under all conditions.
APPEARS IN
RELATED QUESTIONS
Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.
The other name of potential difference is:
The following table shows current in Amperes and potential difference in Volts.
Which law will the graph prove? Explain the law.
Electric cells having 2V potential difference each have been connected in the form of a battery. What will be the total potential difference of the battery in both cases?
What do you understand by the resistance of a wire?
Three resistors are connected to a 6 V battery as shown in the figure given below:
Calculate:
(i) the equivalent resistance of the circuit.
(ii) total current in the circuit.
(iii) potential difference across the 7.2 Ω resistor.
In the figure given below, A, B and C are three ammeters. The ammeter B reads 0.5A. (All the ammeters have negligible resistance.)
Calculate:
(i) the readings in the ammeters A and C.
(ii) the total resistance of the circuit.
Name the instrument which is used to measure the potential difference.
______ is work done per unit charge.
Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres (σ1/σ2 ) is ______
