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عرض 946–960 من أصل 1963 نتيجة
Gold Leaf Electroscope
In rectangular cast metal case, with removable glass window and fitted with 4 mm earthing socket. A metal disc passes through an insulating polythene bush and ends in a flat support for gold leaf. With a transparent scale to show quantum of deflection. With a supply of leaves and instructions for fitting.
SKU: PH45250Gold Leaf Electroscope
In sheet metal case, with removable glass window and fitted with 4 mm earthing socket. A metal disc passes through an insulating polythene bush and ends in a flat support for gold leaf. With a transparent scale to show quantum of deflection. With a supply of leaves and instructions for fitting.
SKU: PH45255Gymnosperms
All Charts are made on PVC rexine, hand drawn, waterproof, in fast multicolours with a black background. Each chart is provided with rollers to hang on wall. Size 75×100 cm.
1) Cycas life history
2) Cycas Anatomy
3) Cycas stem T.S.
4) Gnetum structure & life history
5) Ephedra structure & anatomy
6) Pinus structure & life history
7) Pinus anatomy
8) Pinus leaf
9) Pinus stem
10) Pinus stem secondary growthSKU: B13120Gyroscope, Bicycle Wheelجيرسكوب -العجلة والمحور
This apparatus is designed to help students understand about the world of rotational physics and demonstration of the angular momentum, torque and gyroscopic precession. Spin the wheel to move the wheel’s axis of rotation and hang it from the end of the rope and wheel axel keeping the rope in the vertical orientation and the axel in the horizontal orientation, the wheel will precess with the rope remaining vertical. Ahooked rope is also provided with apparatus.
SKU: PH10589GGyroscopeجيرسكوب
Gyroscope with Gimbal Cradle is an excellent, inexpensive apparatus, which is used to explore the mysteries of the precession, inertial guidance, gyroscopic compasses and stabilization. It is precision machined and balanced and runs smoothly with little vibration. Provided with pull string with handle, weight set and support hook. A pendulum mounting is also supplied that can be used for investigating the rolling moment. It demonstrates the principle of angular momentum. Supplied with user manual.
SKU: PH10589HHalf Wave / Full Wave And Bridge Rectifier Apparatus
Objective : To study Efficiency and Ripple factor in case of Half wave, Full wave and Bridge rectifier on application of load and filters.
Features : Instrument comprises of AC Power Supply, 3 meters to measure Output Voltage, Output Current and ripple factor on electronic AC Voltmeter, 4 PN Junction Diodes, Filter Circuit kit, load Resistances selectable using bandswitch and all important connections points at 4mm Sockets.
Optional Acc : Digital AC millivoltmeter.SKU: PH93032Hall Effect Experiment
Introduction
The resistivity measurements of semiconductors cannot reveal whether one or two types of carriers are present; nor distinguish between them. However, this information can be obtained from Hall Coefficient measurements, which are also basic tools for the determination of carrier density and mobility in conjunctions with resistivity measurement.Working
When a conductor through which current is flowing, is placed in the magnetic field, a potential difference is generated between two opposite edges of the conductor in the direction mutually perpendicular to both the field and the conductor. This potential developed is Hall voltage and the phenomenon is called Hall Effect. In the experimental setup, the crystal mounted on PCB is placed perpendicular to the pole pieces. A constant current is passed through the crystal using the constant current source. Magnetic field is produced by electromagnet operated by 0 – 12 V DC, 5 A power supply. Magnetic field intensity is measured by gauss meter with gauss probe. A Hall voltage thus produced is measured by the multimeter.The following parts are included in Hall Effect Experiment:
PH93225H Hall Probe
PH61033D/5 Advanced Power Supply
PH93225E Electromagnet Setup
PH61500 Constant Current Power Supply
PH93225G Digital Gauss Meter
PH64505 3½ Digit MultimeterSKU: PH93225Hall Probe
Ge single crystal with four spring-type pressure contacts is mounted on the printed circuit board. Four leads are provided for connections with measuring devices.A zero setting can be done by adjusting the spring contacts with the help of screw driver.
Specifications:
Material: Ge single crystal, n type
Resistivity: 8 – 10 ?-cm
Contacts: Spring typeSKU: PH93225HHand Microtome
A handy and simple model with wide flat top, suitable for sectioning of fresh tissues. Screw drum is graduated in 100 close divisions and will cut the specimen in steps of 10 microns each. Complete with a single edged razor blade. But with differential screw, screw drum is graduated in 50 wide divisions.
SKU: B10554
