Probequiz Ecurie Aix
In the following task, an automotive headlight shall be discussed. It consists of a matrix of 9 identical white LEDs and a control circuit according to figure 1. The resistors are set to R1 = 820 Ohm and R2 = 240 Ohm, the forward voltage of the diodes D1 und D2 can be estimated with UF = 0.7 V. The LEDs D3 to D11 are characterized in table 1, the transistor T1 electrical data can be obtained from table 2. All components are ideal. The circuit will be supplied by a car lead acid battery, thus U_BAT = 12.0 V. Determine the current flowing through the diode D1.
1.8 mA
1125 mA
8.2 mA
10 mA
2.8 mA
60° tilt angle correspond to 1,7 G’s lateral acceleration. What tilt angle corresponds to 20,6 m/s² longitudinal acceleration?
76,1°
64,5°
76,2°
64,6°
Due to a misjudgement of the Official your car stands 1,5 meters in front of the timekeeping line for your acceleration run. The acceleration course is on a hill with 35,5% rise. After starting the run your electric system fails at t=2,94s of your measured time. What is the speed at the finish line, if your driver does not break and you disregard friction, drag and other influences except of the gravity (Your car is capable of accelerating constant with 1,37g on a straight slope)?
26,23 m/s
33,95 m/s
29,87 m/s
35,36 m/s
44,89 m/s
39,01 m/s
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