CHSE Odisha Elective Electronics case studies
CHSE Odisha Elective Electronics · Put your knowledge to work in context.
Elective Electronics is the optional subject taken by +2 Science students in Odisha and examined by the Council of Higher Secondary Education (CHSE), Odisha. It is a school-leaving subject, not a professional certification: the mark counts towards the Higher Secondary certificate and towards eligibility for engineering, diploma and science degree admission, and it is almost always studied alongside Physics, Chemistry and Mathematics. The CHSE Odisha Elective Electronics case studies are 5 cases and about 2,603 words.
1LED Strip Voltage Drop and Indicator Resistor
A school workshop builds a display using a 12 V, 2 A LED strip. The strip is mounted 20 m from the power supply and is wired with a reel of flexible cable whose datasheet gives 0.017 Ω per metre per conductor.
570 words, about 3 min2Zener Shunt Regulator Failure After Load Disconnect
A trainee repairs a small 6 V mains adapter built from a 12 V rms transformer, a bridge rectifier, a 1000 µF smoothing capacitor, a 100 Ω series resistor and a 6.2 V, 400 mW zener diode. The load normally draws 80 mA.
508 words, about 3 min3BC547 Relay Driver Outside Safe Ratings
A student uses a BC547 NPN transistor to switch a 12 V relay from a 5 V microcontroller board. The relay coil has a resistance of 100 Ω and is connected between +12 V and the collector; the emitter is grounded.
506 words, about 3 min4Op-Amp Gain, Bandwidth and Slew-Rate Limit
A student builds a non-inverting amplifier with an op-amp having a gain–bandwidth product of 1 MHz and a slew rate of 0.2 V/µs. The feedback resistors are 99 kΩ and 1 kΩ, giving a nominal closed-loop gain of 100.
478 words, about 2 min574LS to 74HC Interfacing with an LED Load
A 5 V system uses a 74LS00 NAND gate to drive a 74HC00 input and a red LED. The LED has V F ≈ 2.0 V at 10 mA and is connected from the LS output to ground through a 220 Ω resistor, so it lights when the output is high.
541 words, about 3 min