Build my own experiment
Now Let's build our own experiment. We are going to learn the specific application of Jhksoft Electricity Lab through 5 examples.
Example 1: To measure the resistance of a resistor
This is a typical experiment to measure the resistance of a resistor by the voltammetry method. In this experiment, the following components and devices are to be used:
1 battery set, 1 single-pole single-throw switch, 1 slide resistor, 1 fixed resistor,
1 ammeter, 1 voltmeter.
a. Create a new experiment project.
b. Chose the required components for the experiment from the Components Box and lay them at experiment area.
c.
Following this, let's set the parameters of some of the
components. Right click the corresponding component for experiment and
chose and click "Attribute" from the popped-up menu and the related
dialog box for setting attributes will be popped up. In this experiment,
we will set the parameters of the components as follows:
Set the fixed resistor at 2ohm;
Set the maximum resistance of the slide resistor at 10ohm;
Set the number of cells of the battery set at 4 cells;
Set the internal resistance at 0ohm.
By these settings we now have a desired voltage supply.
d. Now, let's connect the components with wires in accordance with electricity principles, illustrated as below:
e. Double click with the mouse the bottom of the single-pole single-throw switch to put on the switch. At this instance, the ammeter and the voltmeter will show the current and voltage that they measure. The slipper of the sliding resistance is movable. Press down the slipper with the left key of the mouse and move the mouse leftward and rightward and the position of the slipper is duly changed.
f.
Click the "Display the Direction of the Current" Button 
in
the Tool Bar and the direction of the electric current will be displayed
along the wires. The software also provides the function for automatic
change-over between object diagram and symbol, simply by clicking the
"Object/Symbol" 
Button.
Example
2: The Function of Fuse
This experiment is to demonstrate that when the value of current going through a fuse exceeds its maximum allowable value, the fuse will break down to protect the safety of other components and the power supply.
a.
In this experiment, we are going to use the following components:
1
battery, single-pole single-throw switch, 1 slide resistor, 1 fuse, 1
ammeter.
Chose
these components from the Components Box and lay them inside the
experiment zone.
b. Set the total resistance of the slide resistor at 5ohm by placing the slipper at leftmost position. Set the fuse maximum allowable current at 1A.
c. Connect the components with wires in accordance with electricity principles.
d. Put on the switch. Slowly move the slipper of the slide resistor rightward and pay attention to the value of current indicated by the ammeter. As soon as the value of current passing through the fuse reaches 1A, the fuse will blow out. The blown out fuse can be repaired. To repair it, just cut off the switch, right click the fuse to be repaired and click "Repair" in the popped up menu and the blown out fuse will be repaired.
Example
3: Passageway
Lamp Circuit
In
our daily living environment, there are various circuits. Some of the
circuits are not too complicated but useful and beneficial to our lives.
The Passageway Lamp Circuit is a typical example, which allows us to
control the lamp both downstairs and upstairs. You can use Jhksoft Electricity Lab
to make this experiment and invite
your students to participate in it. There is never danger of shock in our
experiment platform.
a. In this experiment, 1 infinite power supply, 2 single-pole double-throw switches and 1 lamp bulb will be used. Let's first lay the components for the experiment inside the experiment area.
b. Set the voltage of the infinite power supply at 220V. Set the rated voltage of the bulb at 220V and the rated capacity at 100W with the maximum allowable current at 1A.
c. Illustrated below is a correct connection method, by which you can
connect the components with wires.
d. Now, it is ready for you to control the passageway lamp freely with the 2 single-pole double-throw switches. Double click the upper part of the switch to cut the key off. Double click the left bottom of the switch to turn on the key to the left pole and double click the right bottom of the switch to turn on the key to the right pole.
Example
4: Electric Ring
In
Jhksoft Electricity Lab, there are electric
rings, signal lights and etc. which will make the circuit s in your
experiments vivid and dramatic. Now let's make a small electric ring.
In this experiment, we need 1 storage battery set, 1 switch and a ring. Following this let's set the attributes of the electric ring circuit: set the resistance of the electric ring at 20ohm; set the vibration initializing current at 0.1A. Connect the components with wires. Finally close the key of the switch and the electric ring will make ringing sound.
Example
5: The most Primitive Computer
Control Circuit
Before electronic computer is invented, people create simple control circuits and computing circuits with electromagnetic relays. In this experiment, we are going to create a time sequence control circuit with electromagnetic relays. In this circuit we are going to use 4 electromagnetic relays with parameters set at: coil resistance of 1ohm and pick-up current of 0.1A. Reminding: when the absolute value of current passing through the coil exceeds the pick-up current, the electromagnetic relay will be closed and when the current is below the pick-up value, the electromagnetic relay will be open. 3 small bulbs will be used with the parameters set at: rated voltage at 0.7V, rated capacity at 0.5W and the maximum current at 1.5A. There are 4 battery cells with the internal resistance set at 1ohm. 1 slide resistor is to be used with the slipper placed at the leftmost position so that its equivalent resistance in the circuit could be minimum. One single-pole single-throw switch is also needed in the circuit.
Connect
the components with wires and close the switch. Now, what do you find?
Move the slipper of the slide resistor rightward and the time sequence
will stop. Move the slipper to the left position and the time sequence
will be resumed. Are you able to explain the reason?
General speaking, you can design a lot of circuits in Jhksoft Electricity Lab. The above examples are only demonstrated as a guide to show you how to use this software. In classroom lessons, you can use it to make your teaching more vivid and dramatic. After class you can always invite your students to share the happiness in using it.
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