The explosion was caused by a electrolytic capacitor. Remember, If you connect a electrolytic capacitor with high voltage and wrong polarity, the outcome is fantastic!
Capacitor Voltage-current Relations
Back to the lab, we set up an RC circuit and applied different voltage patterns to it. Our prediction for sinusoidal wave and triangular wave is displayed in the following picture:
We measured the resistor and the capacitor
We applied 1kHz sinusoidal wave, 2kHz sinusoidal wave and 100Hz triangular wave to the circuit and used oscilloscope in WaveGen to plot the graphs.
1kHz sinusoidal
2kHz sinusoidal
100Hz triangular
Inductor Voltage-current Relations
Then we replaced the capacitor from the previous lab with an inductor. Everything else is still the same as the previous lab. We applied 1kHz sinusoidal and 2kHz sinusoidal voltage input and used the oscilloscope in WaveGen to plot the graphs.
1kHz sinusoidal
2kHz sinusoidal
Summary: Capacitors and inductors are useful elements in circuit. They are relatively big comparing to other electronic components. Capacitor is a double plate (usually circular) separated by a layer of dielectric. Inductor is a coil of wire (solenoid). The current in RC circuit is i = 1/RC * ∫ idt and the current in LC circuit is i = L/C * di/dt.
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