ExpEYES

This section explores the magnetic effects of electric current, electromagnetic induction and the AC crcuits having the LCR elements. The phase and amplitude relationships between voltages across various circuit elements are measured and analysed. Some experiments on sound and mechanics are also included.

• Study of Electromagnet. An electromagnet is made by powering a coil from the variable DC supply.
• Driven pendulum, Resonance. A coil is powered by pulses from SQ1. A pendulum with a magnetic bob is placed before it. The frequency of SQ1 is adjusted to observe resonance.
• Electromagnetic Induction. A magnet is dropped into a coil and the resulting induced voltage waveform is captured.
• Simple AC Generator. A AC generator is made by placing a coil near a rotating magnet.
• Direct and Alternating Currents. Explains the difference by plotting the voltage as a function of time.
• Resistor in AC Circuits. Explores the current and voltage of AC across a resistor. Amplitude and phase relationships are observed.
• Capacitor in AC Circuits. Explores the relation between current and voltage of AC applied to a capacitor.
• Inductor in AC Circuits Explores the relation between current and voltage of AC applied to an Inductor.
• AC to Series LCR circuit, Resonance. Explores the series LCR circuit under AC. Resonance is demonstrated.
• Resistivity of Water using AC. Resistivity of water is mesured by comparing with a known resistance, under an AC voltage.
• AC Resistance of Human Body. Role of capacitance in the resistance of human body is demonstrated.
• Mutual Induction, Transformer. Demonstrates mutual induction using two coils.
• AC Powerline Pickup. Voltage induced on conductors placed near AC powerline is observed.
• Generating and Digitizing Sound. Sound, having a fixed frequency, is generated and digitized by a microphone.
• Working of Stroboscope. Stroboscope is demonstrated using a rotating disc and a pulsed LED light source.
• Distance using echo module SR04. Distance to a flat surface is measured using a 40 kHz ultrasound echo module.
• Optical Communication Demo. Principle of transmitting an electrical signal as light is demonstrated.