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Please answer the following physics questions: Section 2 Capacitors 8. Transducers 25 Marks 05. A capacitor, initially charged to Qmax = 11.8 p0 and with
Please answer the following physics questions:
Section 2 Capacitors 8. Transducers 25 Marks 05. A capacitor, initially charged to Qmax = 11.8 p0 and with a maximum potential difference of 4.5 V was discharged through a resistor. After a time constant of 35 milliseconds (ms), the p.d. across the capacitor was 37% of its initial value of 4.5 V. a. Explain what is meant by capacitance and calculate the capacitance of the capacitor. (4) b. Calculate the maximum energy that can be stored in the capacitor. (2) c. Calculate the charge remaining in the capacitor after 70 ms. (3) d. Calculate the voltage across the capacitor after 70 ms. (3) 06. a. Explain what is meant by a \"positive temperature coefcient\" (PTC) thermistor. (3) b. Apply your knowledge of thermistors to explain how you think they are used in an electric bread making machine (usually called a "bread makef'). (2) c. Draw a thermistor as a component in a circuit with 2 other components. Label each component you draw. (2) 07. Study the diagram below for a light dependent resistor (LDR). V." has a constant value of V.\" = 7.2 V. Rs has a constant value of Rs = 215 a. At a certain light intensity, the resistance of the LDR takes the value RL = 110 Q. a. Calculate the value of the voltage labelled as Vout on the diagram. (3) b. If the light intensity is reduced, will the values of RL and Rs increase or decrease? (1) c. Describe an application of an LDR. (2)Step by Step Solution
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