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Transformer can step-up or step-down a DC voltage. True False Question 19 (5 points) () Listen Two capacitors are connected in series. Calculate the equivalent capacitance, if the first capacitor has the capacitance of 15 nF and the second one has the capacitance 20 nF. Round off your answer to one decimal place. When writing the unit, remember about capital and lower-case letters. Your Answer: Answer units Question 20 (5 points) () Listen Two capacitors are connected in parallel. Calculate the equivalent capacitance, if the first capacitor has the capacitance 52 pF and the second one has the capacitance 54 pF. Round off your answer to ones. When writing the unit, remember about capital and lower-case letters. Your Answer: Answer units Question 21 (2 points) S ) Listen In a capacitor, the current leads the voltage by 90 degrees. K O True O False Question 22 (2 points) = ) Listen In an inductor, the current leads the voltage by 90 degrees. O True O False