Products

For demonstrating the expansion or contraction of metals.

Consists of two brass rods with insulated handles. One of the rods has a ring and the other one has a ball of approximate diameter 25mm, attached at the end. The brass ball passes through the ring when both are at room temperature, but when the ball is heated it expands and can not pass through the ring.

For the qualitative study of expansion of liquids, the principles of thermometry, and the rise and fall of a liquid column due to expansion or contraction of air in a bulb.

Consists of a borosilicate glass bulb of diameter approximately 50mm with a 30cm long stem of 5mm bore.

For demonstrating the different heat conductivity of five metals by observing the melting of wax.

Consists of five rods (l x d), 75 x 5mm of aluminum, brass, iron, copper, and stainless steel which are radially fitted on a brass disk of about 27mm diameter. Each of these rods have a cavity at the outer end for holding paraffin wax. The central disk is joined to an insulated handle by 125mm long plated steel rod. Overall length about 32cm.

For determining the mechanical equivalent of heat by measuring the heat generated in an electrical resistance.

Includes the calorimeter set of two described above. The plastic lid is fitted with a heating coil to work with 6V supply or a battery, two 4mm socket binding posts for electrical connections, stirrer with an insulated handle and a single-hole rubber stopper for inserting a thermometer. Supplied without the thermometer. Requires a suitable voltmeter, ammeter, and thermometer (not supplied).

For demonstrating the phenomenon of convection in air and the principle of room ventilation.

Consists of an enamelled metal box (l x w x h), 20 x 10 x 10cm, having a sliding glass door and two glass chimneys. When a candle in a socket is placed under one chimney and a smouldering tape or touce paper is placed underneath the other chimney, the flow pattern of smoke dramatically illustrates the formation of convection currents. Candle, socket, tape or touce paper are not supplied.

To show that water has a maximum density at 4? C.

Consists of a sheet metal cylinder, with two tubes in the upper and lower regions for inserting thermometers through rubber stoppers. Mounted on a base and encircled midway by an outer trough for holding a mixture of ice and salt. Temperature of the water is measured at the top and bottom of the inner cylindrical vessel over a period as the water cools. Supplied without the thermometer.

This comprehensive kit contains all of the necessary pieces for an understanding of electrical induction, magnetic fields, electromagnets, motors, AC/DC motors, basic transformers, series and parallel transformers, and many other applications. The kit features snap together frames for laminated or solid core transformer frames, motor mounts, field coils, and Thompson ring experiments. Includes fitted case and instructions. Requires power supply and meter.

45-075 Induction Kit includes:
• Laminated "U" core in plastic frame
• Laminated "I" beam in plastic frame
• Empty frame for iron cores or motor mounting
• (2) small frames for attachments
• 600 turn primary coil
• 300 turn secondary coil
• (2) empty coils for winding experiments
• Long solid iron core
• (2) short solid iron cores
• AC induction motor in laminated frame
• Coil of magnet wire for winding
• Levitating Thompson ring
• Magnetic motor rotor
• (2) mini compasses
• (2) bar magnets
• Alligator clips
• Rubber bands
• Winding coil contacts
• Aluminum Lenz' Law disc on shaft
• Connecting wires with banana plugs
• Sturdy fitted case
• Instructions

For accurately measuring the coefficient of linear expansion of electrically conducting materials such as metal rods.

Consists of a frame of thermally rigid material consisting of two cast end pieces connected by two steel rods which appropriately hold a plated brass pipe (l x d), 500 x 25mm. The pipe acts as a steam jacket and is fitted with steam inlet and outlets as well as a tube suitable for inserting a thermometer through a rubber stopper. The pipe jacket is held in proper alignment with the help of two metal yokes, requiring minimal adjustment while removing or inserting the rod under study. One of the yokes has a knurled thumb screw to lock the steam jacket in place. The expanding rod makes contact with a 0.01mm micrometer which measures the extent of expansion when steam is passed through the jacket. The exact point of contact of the rod and the micrometer is found with the help of an indicator lamp. The design avoids use of loose wires.

Supplied with three rods of brass, copper and steel. Steam generator and thermometer are not included.

For demonstrating and determining the coefficient of volume expansion of liquids when heated.

Consists of a borosilicate glass bulb to hold 10mL of a liquid, in a capillary stem with a funnel at the top. The capillary stem is graduated to 0.5mL, subspanided every 0.01mL.

For determining the melting point of solid substances. (upper limit 250?C)

Consists of an aluminum cylinder (l x d), 50 x 63mm with a slanted hole of diameter 7mm on the top for inserting a thermometer. Can be heated on a burner. The substance to be melted is placed on the top of the cylinder. Melting point is noted when melting occurs.