## Categories starting with C

## Items starting with C

### CAPACITANCE BOX

Each dial operated by a knob. Special type of switches are provided to minimize the residual capacitance.

### Capacitance Demonstration Kit

- Constant area of plates show capacitance C with variation of distance d ( C ∝ 1/d).
- The d can be increased with spacers in steps on 1mm.
- U shaped small bench with marking in cm eitherside.
- 3 different dielectric sheet.
- Large size plates, suitable for demonstration to a group of students.

### CBSE BIOLOGY EXPERIMENT KIT

Exp-1 Osmosis by measuring the rate of pressure change as water moves in or out of potato wells filled with various concentrations of sugar solutions.

Exp-2 Comparative study of the rates of transpiration in the upper and lower surface of leaves.

Exp-3 To study the rate of respiration in flower buds/leaf tissue and germinating seeds.

Exp-4 Collect and study soil from at least two different sites and study these for texture, moisture content, pH and water holding capacity of soil. Correlate with the kinds of plants found in them.

Exp-5 Collect water from two different water bodies around you and study the samples for pH, clarity and presence of any living organisms.

Exp-6 To study the effect of the different temperatures and three different pH on the activity of salivary amylase on starch.

Exp-7 To show experimentally that light is necessary for photosynthesis

### CBSE CHEMISTRY EXPERIMENT KIT

Exp-1 Determination of pH of some solutions obtained from fruit juices, solution of known and varied concentrations of acids, bases and salts using pH paper or pH sensor.

Exp-2 Comparing the pH of solutions of strong and weak acids of same concentration.

Exp-3 Study the pH change in the titration of a strong base.

Exp-4 Study the pH change by common-ion in case of weak acids and weak bases.

Exp-5 Determination of strength of a given solution of hydrochloric acid by titrating it against standard sodium carbonate solution.

Exp-6 Determination of strength of a given solution of sodium hydroxide by titrating it against standard solution of oxalic acid.

Exp-7 Effect of concentration and temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid.

Exp-8 Variation of cell potential in Zn/Zn2+|| Cu2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.

Exp-9 To determine the melting point of ice and the boiling point of water.

Exp-10 To find the pH of the following samples by using pH paper/ pH sensor.- Dilute Hydrochloric acid, Dilute NaOH solution, Dilute ethanoic acid solution, Lemon juice, Water, Dilute sodium bicarbonate solution.

Exp-11 To find out the molarity of mohr’s salt.

### CBSE PHYSICS EXPERIMENT KIT

Exp-1 Using a simple pendulum, plot L-T and L-T2 graphs. Hence find the effective length of second's pendulum using appropriate graph.

Exp-2 To study the relationship between force of limiting friction and normal reaction and to find the co- efficient of friction between a block and a horizontal surface.

Exp-3 To find the downward force, along an inclined plane, acting on a roller due to gravitational pull of the earth and study its relationship with the angle of inclination φ by plotting graph between force and sin(φ).

Exp-4 To study the variation in volume with pressure for a sample of air at constant temperature by plotting graphs between P and V, and between P and I/V.

Exp-5 To find the speed of sound in air at room temperature using a resonance tube by two resonance Positions.

Exp-6 To determine resistance per cm of a given wire by plotting a graph of potential difference versus current.

Exp-7 To draw the I-V characteristic curve of a p-n junction in forward bias and reverse bias.

Exp-8 To draw the characteristic curve of a zener diode and to determine its reverse breaks down voltage.

Exp-9 Characteristics of PN diode.

### CENTRAL AND CHORDAL ANGLES OF A CIRCLE.

Model for central and chordal angles of a circle. Different angles subtended at the circumference are compared with the corresponding angles subtended at the centre. Made of Acrylic sheet.

Approx size : 275x227mm

### Centrifuge Machine

Hand Powered

This centrifuge machine is equipped with

a clamp for mounting to a table 1 to 4 cm

thick. Made from enamel coated cast metal.

Holds centrifuge tubes up to 15ml in capacity.

The unit is approximately 30cm tall.

### CENTRIPETAL FORCE AND MOMENT OF INERTIA

- Easy setup.
- Computer connectivity.
- Labquest mini may be used in other experiments also.
- Sturdy base.
- Centripetal force.
- Moment of inertia.
- Oscillation period
- Angular speed.
- Restoring force.
- Axis of rotation.
- Center of gravity.

### CHEMICAL CLOCK & WATER CLOCK

This clock keeps accurate time using energy from a battery that you make. Simply add weird liquids such as soda, fruit juice, dilute ketch-up, salt water, etc. to the two containers, insert four metal electrodes, and connect with three wires.

### CIRCULAR FORCE APPARATUS

Exp- To measure the force required under static conditions to displace the mass the same distance against the pull of the spring.

### COLOUR MIXER

Nature of primary & secondary colour may be shown using this apparatus. Colour mixing takes place when two or more colours come together to form a different colour. This apparatus demonstrates how different colours of light form - from the three primary colours. The three basic colours for mixing light are red, green & blue. There is a control box which controls the intensity of six numbers of LEDs (diodes) which are mounted on a stand. Additive and subtracting colour mixing are demonstrated on the screen.