Survey

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Nanofluidic circuitry wikipedia, lookup

Negative resistance wikipedia, lookup

Galvanometer wikipedia, lookup

Valve RF amplifier wikipedia, lookup

Test probe wikipedia, lookup

Josephson voltage standard wikipedia, lookup

CMOS wikipedia, lookup

Operational amplifier wikipedia, lookup

Schmitt trigger wikipedia, lookup

TRIAC wikipedia, lookup

Power electronics wikipedia, lookup

Electrical ballast wikipedia, lookup

Voltage regulator wikipedia, lookup

Switched-mode power supply wikipedia, lookup

Power MOSFET wikipedia, lookup

Current source wikipedia, lookup

Resistive opto-isolator wikipedia, lookup

Surge protector wikipedia, lookup

Rectiverter wikipedia, lookup

Current mirror wikipedia, lookup

Ohm's law wikipedia, lookup

Opto-isolator wikipedia, lookup

Multimeter wikipedia, lookup

Transcript
```









Define voltage and give its unit of measurement.
Identify the two different types of voltmeters.
Connect a voltmeter in a circuit to measure voltage.
Use a digital multimeter to measure voltage.
Define current and give its unit of measurement.
Connect an ammeter in a circuit to measure current.
Use a digital multimeter to measure current.
Define resistance and give its unit of measurement.
Determine the resistance value using the resistor color
code chart.
Use a digital multimeter to measure resistance.
Topic
1.1 Introduction
1.2 Voltage Measurement
1.3 Current Measurement
1.4 Resistance Measurement
1.5 Lab Activity 1
1.6 Lab Activity 2
1.7 Module Exercise
Page No.
4
5
8
11
13
16
17

wall outlet/power socket
Batteries

DC: Direct Current
In DC, the flow of electric charge is only in one direction. DC is
Produced by a battery and is used to power portable devices
such as the
 cell phones,
 iPods, etc.

AC: Alternating Current
In AC, the flow of electric charge periodically reverses direction. AC
Is generated in a powerplant and is delivered to the electric outlets
 Washing machines,
 television,
 water
 heater etc. operate on ac.

Note: See Video

Devices
Sources- Solar Panel

Device
Source – Power Plant

Voltage is the electric force that drives
current around an electric circuit.
Unit of voltage is volt,
 Symbol is ‘V’.

A voltmeter is used to measure voltage.
There are two types of voltmeters
Analog Voltmeter
Digital Voltmeter

The analog multimeter
measures voltage by
deflecting a needle against
a scale.

A digital multimeter displays
the voltage value in digits.

Note: Voltage and other electrical quantity may
also be measured using a digital multimeter
(DMM)
Set the multimeter knob to
read voltage (dc or ac) and
select the range.
 Connect the two probes
with proper polarity in
parallel with the
component/device, across
which the voltage is to be
measured.


Switch ON the meter and
Note: For unknown voltages, it is better to begin with the biggest
range, and then reduce the range as this will protect the meter

Connect a voltmeter to
measure the total voltage
supplied by the battery.

Connect voltmeters to
measure the voltages across
each of the three bulbs.
Current is a measure of the flow of electrons in an
electric circuit.
 Current is measured in amperes (A) and is denoted by
the symbol ‘I’


http://www.ndted.org/EducationResources/HighSchool
/Electricity/amperage.htm

Current can also be measured with a
multimeter.

Set the multimeter knob to read current (dc
or ac) and select the range.

Break the circuit and insert the multimeter
probes across the break to
complete the circuit.

Switch ON the meter and read the current

http://www.ndted.org/EducationResources/HighSchool/Electricity/a
mperage.htm

Resistance is a measure of the opposition
to the flow of current. It is measured in
ohms (Ω) and is denoted by the symbol
‘R’


Resistance can be both good and bad. If we are
trying to transmit electricity from one place to
another through a conductor, resistance is
undesirable in the conductor.
Good
 The heat that is generated from electric heaters or
the light that we get from light bulbs is due to
resistance

Color1 Color2 x 10Color3
Calculate the resistance of the
resistor which has the following
color code:
Red Green Red Gold
R = Color1 Color2 x 10Color3
= 2 5 X 102
= 2500Ω = 2.5kΩ.
Tolerance= + 5%.
Therefore, R =2.5kΩ+ 5%
http://www.ealnet.com/m-eal/resistor/resistor.htm

V=I x R
› R = Resistance
› V = Voltage
› I = Current
http://www.ndted.org/EducationResources/HighSchool/Electricity/ohmsla
w.htm
```
Related documents