Electricity and Magnetism

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5H 10.20 - Oersted's Effect
	Demonstrates: Deflection of a compass needle near a current carrying wire. Description: Oersted observed that a compass needle placed near a wire deflected when current flowed. In this demo, a long compass needle deflects one way when current flows in a nearby wire. When the direction of current is reversed, a different deflection is seen.

5H 10.30 - Magnetic Field Lines
	Demonstrates: Magnetic field lines Description: Iron filings sprinkled on a plastic sheet align with the magnetic field of a magnet placed below the sheet. The pattern of magnetic field lines can be seen.

5H 10.31 - Magnetic Needle
	Demonstrates: Horizontal and vertical components of earth's magnetic field; magnetic deflection due to currents. Description: A magnetic needle is mounted in a dip circle which can be rotated. When it is horizontal, the needle points in the direction of the horizontal component of the earth's magnetic field. When the dip circle is rotated to the vertical plane, the needle indicates the dip angle of the magnetic field. Alternatively, current can be passed through the brass conductors around the needle to demonstrate magnetic deflection due to a current.

5H 15.20 - Induced Electrical Field
	Demonstrates: Faraday's Law, motional emf, induced currents, energy conversion. Description: As a coil on a pendulum passes between the poles of an electromagnet, induced currents cause a small bulb to light. The pendulum swings freely when the electromagnet is off. When the magnet is turned on, the amplitude of swing decreases on each pass showing conversion of gravitational energy to kinetic energy to electromagnetic energy to thermal energy. This demonstration can be done as a good introduction to demonstration 5K 20.10.

5H 15.30 - Solenoids
	Demonstrates: Magnetic field of a solenoid. Description: May be used just as a visual example of a solenoid. If current is passed through the solenoid, the magnetic field can be explored with a suspended bar magnet or similar probe

5H 15.40 - Magnetic Field Around Current Carrying Wires
	Demonstrates: Magnetic field lines. Description: Sprinkle iron filings on charged plate to get field lines.

5H 20.40 - Suspended Bar Magnet
	Demonstrates: Magnetism. Description: Suspended magnet can be deflected with another magnet.

5H 30.10 - Cathode Ray Tube
	Demonstrates: Kinetic energy of particles. Description: A windmill on a track in a glass tube spins when hit by electrons.

5H 30.20 - E/M Tube
	Demonstrates: Effect of electric and magnetic fields on a beam of electrons. Description: An electron gun emits a beam of electrons which can be bent into a circular or helical trajectory by the magnetic field of a Helmholtz coil. The beam is bright and clearly visible.

5H 30.30 - Crooke's Discharge Tube (Heating Effect)
	Demonstrates: Heating effect. Description: Discharge tube contains a thin metal target that becomes red hot after being bombarded by electrons.

5H 30.40 - Crooke's Discharge Tube (Magnetic Effect)
	Demonstrates: Magnetic effect. Description: Discharge tube has a florescent coated screen with a slit near the negative electrode. In a magnetic field a luminous line is bent upwards or downwards depending on the direction of the field lines.

5H 40.10 - Force on Parallel Wires
	Demonstrates: Direction of magnetic force between currents. Description: Two wires are given a current. If the current is in the same direction the wires attract each other. Opposite directions, the wires repel each other.

5H 40.30 - Jumping Wire in Magnetic Field
	Demonstrates: Magnetic force on a current carrying wire. Description: Place wire between poles of permanent magnet. When current is applied wire will either jump up or down depending on the direction of the current.

5H 60.10 - Magnetic Force on Current Carrying Conductor
	Demonstrates: Demonstrates the force a current carrying conductor will feel due to the magnetic field it rests in. F = IL x B Description: A graphite rod is placed on top of the conducting rails apparatus. Below the apparatus strong magnets are placed (neodymium are available). When a current is run through the apparatus, the graphite rod will feel a force, and move in a direction based on the magnetic field and current directions; the direction of the current can be reversed to have the rod move in the opposite direction.