Precise instrument for demonstrating the relationship between pressure and volume of a given amount of gas. Two glass tubes, one closed at one end, and the other with both ends open are connected by a long rubber tube. Wooden meter rule permits measurement.

The apparatus consists of two parallel metal support rods with heavy cast metal legs at their either end. One of the legs has ball bearing mounted pulley wheel at its outer side with its spindle carrying split collect chuck for holding one end of test rod while other end of the test rod supported to clamping block on the other leg.

The objective is to plot the input, output and transfer characteristics of a PNP or NPN transistor in common emitter & common base configuration.

The device consists of:

• Two regulated DC power supplies, one is 0-1 volt and other is 0-10 volts.
• 1PNP & NPN transistor with three terminals for base, emitter & collector.
• Four square transparent deluxe quality moving coil type meters, two meters are for measurement of different voltages and other two are for measurement of different currents.

These meters have different ranges as mentioned:

1. 1st meter 0-1V for measurement of base voltage (input) (VB)
2. 2nd meter 0-1/10V (double range) for measurement of collector voltage (output) (VC).
3. 3rd meter 0-250A/25mA for measurement of base current. (IB)
4. 4th meter 0-25mA for measurement of collector current. (IC)

1.Consists of a mirror scale 12 cm. long and supports spring, a weight holder and slotted weights of 250 gms. capacity.
2.This complete apparatus has a 15 cm. adjustable mirror scale, to prevent parallax error, and is graduated in millimeters and mounted on sturdy 30 cm. support rod. A hook supporting a coiled spring with a mass hanger and indicator is attached to the rod. Supplied with slotted weight of 250 gm. capacity.

For demonstrating the principle of conservation of momentum and showing that momentum is a vector quantity having direction as well as magnitude. The apparatus comprises the following items.

1. A curved wooden runway and its highest point, having a groove down which a steel ball may be rolled.

2. An object sphere support. This is an adjustable device which attaches to the mounting plate of the runway and will support a ball either exactly opposite the end of the runway for head-on collision or slightly offset for oblique impacts.
3. A plumb-bob for making the plumb line.
4. Two spheres (steel ball bearing 19 mm. diameter.

The whole apparatus is mounted on wooden base by clips. A plant shoot is sealed into a stopper which fits the end tube and the whole apparatus is filled with water, the open end of the capillary tube, which is graduated in millimeters, dipping into beaker of water. The position of the air bubble may easily be adjusted by opening the glass stopcock to admit water from the reservoir.

Precise instrument for demonstrating the relationship between pressure and volume of a given amount of gas. Two glass tubes, one closed at one end, and the other with both ends open are connected by a long rubber tube. Wooden meter rule permits measurement.

The apparatus consists of two parallel metal support rods with heavy cast metal legs at their either end. One of the legs has ball bearing mounted pulley wheel at its outer side with its spindle carrying split collect chuck for holding one end of test rod while other end of the test rod supported to clamping block on the other leg.

The objective is to plot the input, output and transfer characteristics of a PNP or NPN transistor in common emitter & common base configuration.

The device consists of:

• Two regulated DC power supplies, one is 0-1 volt and other is 0-10 volts.
• 1PNP & NPN transistor with three terminals for base, emitter & collector.
• Four square transparent deluxe quality moving coil type meters, two meters are for measurement of different voltages and other two are for measurement of different currents.

These meters have different ranges as mentioned:

1. 1st meter 0-1V for measurement of base voltage (input) (VB)
2. 2nd meter 0-1/10V (double range) for measurement of collector voltage (output) (VC).
3. 3rd meter 0-250A/25mA for measurement of base current. (IB)
4. 4th meter 0-25mA for measurement of collector current. (IC)

1.Consists of a mirror scale 12 cm. long and supports spring, a weight holder and slotted weights of 250 gms. capacity.
2.This complete apparatus has a 15 cm. adjustable mirror scale, to prevent parallax error, and is graduated in millimeters and mounted on sturdy 30 cm. support rod. A hook supporting a coiled spring with a mass hanger and indicator is attached to the rod. Supplied with slotted weight of 250 gm. capacity.

For demonstrating the principle of conservation of momentum and showing that momentum is a vector quantity having direction as well as magnitude. The apparatus comprises the following items.

1. A curved wooden runway and its highest point, having a groove down which a steel ball may be rolled.

2. An object sphere support. This is an adjustable device which attaches to the mounting plate of the runway and will support a ball either exactly opposite the end of the runway for head-on collision or slightly offset for oblique impacts.
3. A plumb-bob for making the plumb line.
4. Two spheres (steel ball bearing 19 mm. diameter.

The whole apparatus is mounted on wooden base by clips. A plant shoot is sealed into a stopper which fits the end tube and the whole apparatus is filled with water, the open end of the capillary tube, which is graduated in millimeters, dipping into beaker of water. The position of the air bubble may easily be adjusted by opening the glass stopcock to admit water from the reservoir.