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The figure below shows the circuit of a battery polarity tester using two light emitting diodes (LED) X and Y and a resistor R. The LED's have a forward voltage drop of 1.8 V and the reverse bias leakage current that can be assumed to be zero. Currents below 0.6 mA do not produce any visible light output from the LEDS and the largest LED current allowed is 75 mA. The battery is connected between terminals A and B. A o R = 1500 %3D Bo If the positive terminal of the battery is connected to B and the negative terminal to A, state which LED will be forward biased and hence glow X or Y? i) ii) Calculate the current in the resistor R when the battery connected to A and B has a voltage of 6V. iii) What is the smallest battery voltage that can be tested? iv) What is the largest battery voltage that can be tested? v) What is the largest power the resistor dissipates?

The figure below shows the circuit of a battery polarity tester using two light emitting diodes (LED) X and Y and a resistor R. The LED's have a forward voltage drop of 1.8 V and the reverse bias leakage current that can be assumed to be zero. Currents below 0.6 mA do not produce any visible light output from the LEDS and the largest LED current allowed is 75 mA. The battery is connected between terminals A and B. A o R = 1500 %3D Bo If the positive terminal of the battery is connected to B and the negative terminal to A, state which LED will be forward biased and hence glow X or Y? i) ii) Calculate the current in the resistor R when the battery connected to A and B has a voltage of 6V. iii) What is the smallest battery voltage that can be tested? iv) What is the largest battery voltage that can be tested? v) What is the largest power the resistor dissipates?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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hi, can you help me with iii, iv and v?

The figure below shows the circuit of a battery polarity tester using two light emitting diodes (LED) X and Y and a resistor R. The LED's have a forward voltage drop of 1.8 V and the reverse bias leakage current that can be assumed to be zero. Currents below 0.6 mA do not produce any visible light output from the LEDS and the largest LED current allowed is 75 mA. The battery is connected between terminals A and B. A o R = 1502 本ン Y Bo i) If the positive terminal of the battery is connected to B and the negative terminal to A, state which LED will be forward biased and hence glow X or Y? ii) Calculate the current in the resistor R when the battery connected to A and B has a voltage of 6V. iii) What is the smallest battery voltage that can be tested? iv) What is the largest battery voltage that can be tested? v) What is the largest power the resistor dissipates?
Transcribed Image Text:The figure below shows the circuit of a battery polarity tester using two light emitting diodes (LED) X and Y and a resistor R. The LED's have a forward voltage drop of 1.8 V and the reverse bias leakage current that can be assumed to be zero. Currents below 0.6 mA do not produce any visible light output from the LEDS and the largest LED current allowed is 75 mA. The battery is connected between terminals A and B. A o R = 1502 本ン Y Bo i) If the positive terminal of the battery is connected to B and the negative terminal to A, state which LED will be forward biased and hence glow X or Y? ii) Calculate the current in the resistor R when the battery connected to A and B has a voltage of 6V. iii) What is the smallest battery voltage that can be tested? iv) What is the largest battery voltage that can be tested? v) What is the largest power the resistor dissipates?
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