12" Hollow glass friction rod. Approximately 1/2" in diameter.
12" Hollow glass friction rod. Approximately 1/2" in diameter.
12" Solid plastic friction rod. Approximately 1/2" in diameter.
12" Solid plastic friction rod. Approximately 1/2" in diameter.
Hard rubber, ebonite friction rod with rounded edges about 11 Inch (280mm) x 0.47 Inch (12mm) Length x Diameter. Measurements are approximate.
Hard rubber, ebonite friction rod with rounded edges about 11 Inch (280mm) x 0.47 Inch (12mm) Length x Diameter. Measurements are approximate.
12" x 12" Silk riction pad.
12" x 12" Silk friction pad.
12" x 12" Cotton Friction Pad.
12" x 12" Cotton Friction Pad.
12" x 12" Wool friction pad.
12" x 12" Wool friction pad.
Demonstrates how solar energy and cells work. Has an in-built battery compartment to accept a re-chargeable "AA" battery (not included). Car can run on solar power or on the battery and the battery can be charged. The unit also has a pair of terminals from which a current of 2v dc can be drawn. 5"L x 2.75"W x 3"H.
Demonstrates how solar energy and cells work. Has an in-built battery compartment to accept a re-chargeable "AA" battery (not included). Car can run on solar power or on the battery and the battery can be charged. The unit also has a pair of terminals from which a current of 2v dc can be drawn. 5"L x 2.75"W x 3"H.
By touching two metal strips simultaneously your body becomes a path for charged molecules to complete a circuit. Result: the ball glows brightly. Works with several people creating the path. When opened, the energy ball reveals a working circuit for insight into the world of computers.
A photovoltaic cell in an encapsulated panel to allow handling without breakage normally associated with fragile solar cells. 1" x 3/4". 45v, 100mA
A photovoltaic cell in an encapsulated panel to allow handling without breakage normally associated with fragile solar cells. 1" x 3/4". 45v, 100mA
This Kit is designed for use by all who are curious about solar energy. Included: a solar cell, which is encapsulated in a 1 3/4" x 2 7/8" panel. Also included is a 1.5 volt DC motor, a red plastic propeller, and one 12" lead wire. A fun way to acquire basic knowledge about the energy source of the future.
This Kit is designed for use by all who are curious about solar energy. Included: a solar cell, which is encapsulated in a 1 3/4" x 2 7/8" panel. Also included is a 1.5 volt DC motor, a red plastic propeller, and one 12" lead wire. A fun way to acquire basic knowledge about the energy source of the future.
Used to power portable radios, cassette players, children's toys and other situations where four C, AA or AAA cells are used. Size: 6.375 x 4.5 x 0.375" 11 oz. The F6220 includes a 12 foot cord, DC adapter jacks and jumper cord.
Open model. Shows all the parts of a motor. Operating voltage 4-6V. Supplied complete with color disc. 120x80x115mm.
Open model. Shows all the parts of a motor. Operating voltage 4-6V. Supplied complete with color disc. 120x80x115mm.
This unique hand generator is an easy yet effective way to teach how AC and DC electricity is produced. Banana plugs can be inserted into the different connectors to change from AC to DC electricity. The unit has a clear base for easy demonstration of connections. Includes an activity guide. Dimensions: 10" x 7" x 9".
This unique hand generator is an easy yet effective way to teach how AC and DC electricity is produced. Banana plugs can be inserted into the different connectors to change from AC to DC electricity. The unit has a clear base for easy demonstration of connections. Includes an activity guide. Dimensions: 10" x 7" x 9".
Features 3 1/2 digit, 2,000 count display, transistor test, audible continuity, diode test, signal injector, overload protection, pocket-size, low cost. Dimensions: 5" X 2 29/32" W X 1"D. Weight 4.5 oz.
Features 3 1/2 digit, 2,000 count display, transistor test, audible continuity, diode test, signal injector, overload protection, pocket-size, low cost. Dimensions: 5" X 2 29/32" W X 1"D. Weight 4.5 oz.
All parts easily visible. Rigid construction. Mounted on wooden board nicely polished. Workable on 3-4 volts AC or DC.
All parts easily visible. Rigid construction. Mounted on wooden board nicely polished. Workable on 3-4 volts AC or DC.
Comprising a primary coil of insulated copper wire wound on a cylinder and fitted with terminals, together with a secondary coil of fine insulated copper wire wound on a cylinder into which the primary coil may be fitted. A soft iron core, for inserting in the primary coil, is included. To demonstrate the concept of induced current and with the soft iron core the electromagnetic effect can also be demonstrated.
Comprising a primary coil of insulated copper wire wound on a cylinder and fitted with terminals, together with a secondary coil of fine insulated copper wire wound on a cylinder into which the primary coil may be fitted. A soft iron core, for inserting in the primary coil, is included. To demonstrate the concept of induced current and with the soft iron core the electromagnetic effect can also be demonstrated.
To verify Ohm's Law. The apparatus consists of one wire wound rheostat, one moving coil voltmeter and one moving coil ammeter, mounted on a bakelite plate in a wooden case. With four terminals, two for battery connection and two for resistance coil. Supplied with one resistance coil, without battery.
To verify Ohm's Law. The apparatus consists of one wire wound rheostat, one moving coil voltmeter and one moving coil ammeter, mounted on a bakelite plate in a wooden case. With four terminals, two for battery connection and two for resistance coil. Supplied with one resistance coil, without battery.
This apparatus is used to demonstrate and teach the basic principle of an electric meter. Apparatus consists of a 3.75" (90mm) dia. air coil wound on an acrylic tube with an acrylic plate in the center to hold a compass. The coil has multiple tappings of 50, 100 and 200 turns, and also has a built-in potentiometer for varying the current, these features allow multiple readings. Operates on one "AA" battery (not included). Includes one compass. Base 7.34" (195mm) x 4.75" (120mm) x 0.5" (12mm). Total height 4.25" (110mm).
10 kinds of Resistances mounted on a box type plastic base. Ideal for introduction of resistance in a circuit. 5, 10, 15, 200, 470, 1K, 2K, 10K, 50K and 100k resistances. Connection by 4mm sockets. 8"(200mm) x 5"(125mm) x 1"(25mm).
10 kinds of Resistances mounted on a box type plastic base. Ideal for introduction of resistance in a circuit. 5, 10, 15, 200, 470, 1K, 2K, 10K, 50K and 100k resistances. Connection by 4mm sockets. 8"(200mm) x 5"(125mm) x 1"(25mm).