Equivalence of large and small loops around enclosed flux
• D+15+35
A laminated iron core is inserted into a large coil of 1532 turns. Two 6 V.D.C. batteries are hooked up to the coil via a knife switch. Two different loops, one about thee times larger than the other, are laid around the coil and connected to a projection galvanometer through either side of a reversing switch. When the coil is powered the needle deflection is identical whichever loop is chosen
Usage
Spring 2015 - Spring 2026
10
reservations across 4
classes
Related Demos
D+15+0 Bar magnet induces current in a coil, shown on galvanometer. D+15+1 Oscillating magnets in coupled coils D+15+2 Elementary generator: Bar moved in magnetic field. D+15+4 Earth inductor: Coil spun in Earth's field makes voltage. D+15+6 Generator: Coil with DC commutator rotates between magnets. D+15+8 Alternator: Coil with AC commutator rotates between magnets. D+15+10 Hand-cranked AC alternator powers 120 volt lamp. D+15+11 Hand-cranked DC generator powers 120 volt lamp. D+15+12 Back EMF in a series DC motor with large flywheel. D+15+14 Eddy currents: Copper disk rotates over a spinning bar magnet. D+15+16 Damped pendulum: Swinging metal disks damped in magnetic field. D+15+19 Jumping Rings with AC or DC driving D+15+20 Jumping rings: High current AC coil causes rings to jump. D+15+22 Skin effect: Metal sheet shielding varies with frequency. D+15+24 Levitator: Aluminum dish floats four inches off platform. D+15+26 Eddy currents:Small magnet slowly drops between aluminum rails. D+15+28 Eddy currents: Neodymium Magnet Drop. D+15+30 Demonstration of dependence of number of coils on induced flux D+15+40 Flux through loop. EMF depends on position of the meter? D+15+45 Magnet inserted and withdrawn from copper ring causes ring to swing