PLEASE EXPLAIN ALL ANSWERS Consider the circuit at right, consisting of two iden

Question

PLEASE EXPLAIN ALL ANSWERS Consider the circuit at right, consisting of two identical resistors (R1 and R2) and a red LED. The battery is ideal and maintains a constant voltage of +9.0 V (i.e., V1 - V2 = +9.0 V). An ideal voltmeter is connected across the LED and R2. At point a, is the direction of the current to the right, to the left, or equal to zero? To the right. To the left. Equal to zero. There is not enough information to answer the question. Rank, from largest to smallest, the absolute values of the currents at points a, b, c, and d. If any of the currents are zero, state so explicitly. a = b = c = d = 0. a = b = c = d > 0. a = b > c = d = 0. a > b > c = d > 0. a = c = d > b = 0. b = c = d > a = 0. c = d > b > a > 0. There is not enough information to answer the question. Explain your reasoning. Rank, from largest to smallest, the absolute values of the voltages across R1, R2, and the LED. If any of the voltages are zero, state so explicitly. R1 = R2 = LED = 0. R1 = R2 = LED > 0. R1 = R2 > LED > 0. R1 > R2 = LED = 0. R1 > LED > R2 > 0. LED > R1 = R2 = 0. There is not enough information to answer the question. Explain your reasoning. What, if anything, can be said about the absolute value of the reading on the voltmeter? 0.0 V. 9.0 V . The absolute value of the voltmeter reading will be greater than 0.0 V and less than 9.0 V. There is not enough information to answer the question.

Explanation / Answer

since the LED is reverse biased there is no current flow in the circuit because of this the current in the circuit is zero a=b=c=d=0 since no current in the circuit there will not be any drop across the resistance and thus whole of the voltage will be blocked by the LED LED>R1=R2=0 the voltmeter reads the voltage blocked by the LED which is same as the supply voltage which is 9V

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