LAB REPORT # 02

	GROUP # 02

 

APPLIED PHYSICS

What is a multimeter?

•A multimeter is a devise used to measure voltage, resistance and current in electronics & electrical equipment

•It is also used to test continuity between to 2 points to verify if there is any break in circuit or line

•There are two types of multimeter Analog & Digital

–Analog has a needle style gauge

–Digital has a LCD display

A Multimeter is given below

There are 2 styles of multimeters

Switched Manually switch between ranges to get most accurate reading.

Auto Range switches between ranges automatically for best reading

Meter leads

•Red meter lead is connected to Voltage/Resistance or amperage port is considered the positive connection

•Black meter lead is always connected to the common port is considered the negative connection

•Probes are the handles used to hold tip on the tested connection

•Tips Are at the end of the probe and provides a connection point

                                                                                                   

Uses Of Multimeter:

ü Use to measure the current

ü Use to measure the voltage

ü Use to measure the resistance

ü Use to measure the frequency

                                                         

Display & Dial Settings

• Meter Dial Turn dial to change functions. Turn dial to OFF position after use.

• Panel Indicator shows each function and setting range to turn dial to.

• Probe Connections Specific for each function.                                                  

• Digital Display Shows measured value.

BREADBOARD:-

            Breadboards are used to test circuits. Wires and components are simply pushed into the holes to form a completed circuit and power can be applied. One of the main advantages of using a breadboard is that the components are not soldered and if they are positioned incorrectly they can be moved easily to a new position on the board. The diagram of breadboard is given below

EXPERIMENT OF CALCULATING THE CURRENT

APPARATUS

ü Digital Multimeter

ü Connecting wires

ü Bread board

ü Resistance

ü Voltage source

NUMERICAL:-

PARALLEL:-

V = 12V

R1 = 1000 ohms

R2 = 2200 ohms

Using

Rt = r1*r2/ r1+r2

And I = V/R

I = 17.6 mA

SERIES:-

As V = 12 V

R = 2.2 k ohm’s

Using V = IR we get the value of current

I = 5.4 mA