MIT TechTV is an initiative of
Learn about MIT TechTV and check out our resource page for media makers at MIT.
MIT TechTV is an initiative of
You need Adobe Flash Player to watch videos on this site.
A variable capacitor (C), large inductor or solenoid (L), and 200W light bulb (R) are connected in series to 120 VAC. The inductance of the inductor can be varied by inserting an iron core, and the capacitance can be varied by a row of switches. By varying the inductance and capacitance, we can achieve the resonance of the circuit, where maximum current flows through the resistor (light bulb).
Read more about RLC circuits here.
You need to log in, in order to post comments. If you don’t have an account yet, sign up now!
Added 10 months ago | 00:02:52 | 2107 views
Added 10 months ago | 00:01:19 | 4340 views
Added 1 year ago | 00:00:37 | 1823 views
Added 4 months ago | 00:01:42 | 2013 views
Added 1 year ago | 00:01:41 | 2345 views
Added 1 year ago | 00:00:22 | 2335 views
For all but the final capacitance value, the ‘tuning’ effect (whilst moving the core back and forth) cannot be seen. At the resonant position of the core the operator’s hand is out of view.
Posted 11 months by Anonymous
Have you heard of making capacitors from tinfoil and party cups, 1 wrap tinfoil around bottom of cup and attach left hand lead, 2 Add a cup to bottom of other cup ontop of tinfoil, and attach right hand lead, 3 Repeat and Repeat 4 Fill with mineral oil and cap the top. 5 attach Right Hand Leads together (every other cup got one) With a piece of metal tape. 6 Repeat step5 with Left Hand Leads. 7 apply voltage and watch it work.
Posted 10 months by Anonymous