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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ९

Conceptual question. Does a solar cell always maintain the potential across its terminals constant? Discuss

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प्रश्न

Conceptual question.

Does a solar cell always maintain the potential across its terminals constant? Discuss

दीर्घउत्तर
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उत्तर

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.

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पाठ 4: Electric charge and Electric current - Exercise [पृष्ठ ५०]

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सामाचीर कलवी Science [English] Class 9 TN Board
पाठ 4 Electric charge and Electric current
Exercise | Q V. 2. | पृष्ठ ५०

संबंधित प्रश्‍न

You have three resistors of values 2Ω, 3Ω and 5Ω. How will you join them so that the total resistance is more than 7Ω?

1) Draw a diagram for the arrangement

2) Calculate the equivalent resistance.

 


How is a voltmeter connected in the circuit to measure the potential difference between two points? Explain with the help of a diagram.


A current of 5 amperes flows through a wire whose ends are at a potential difference of 3 volts. Calculate the resistance of the wire.


Calculate the power used in the 2 Ω resistor in each of the following circuits: a 6 V battery in series with 1 Ω and 2 Ω resistors.


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 would you suggest to a student if while performing an experiment he finds that the pointer/needle of the ammeter and voltmeter do not coincide with the zero marks on the scales when the circuit is open? No extra ammeter/voltmeter is available in the laboratory.


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.


How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?


Find out the following in the electric circuit given in Figure

  1. Effective resistance of two 8 Ω resistors in the combination
  2. Current flowing through 4 Ω resistor
  3. Potential difference across 4 Ω resistance
  4. Power dissipated in 4 Ω resistor
  5. Difference in ammeter readings, if any.


Name a device that helps to maintain a potential difference across conductors.


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