Laboratory 1 – DC Circuits

Task1

 

Maltimeter reading
A 9.96 ohms
B 9.99 ohms
C 5.56 ohms
D 4.67 ohms
 
 

 

 

 

Task2

 

 

We connected the resistor to bread board battery EMF 8.70 v

The battery is connected to the bred board

 

EMF for A 1.29V
Emf for B 2.31 v
Emf for C 4.20 v
Emf for D 2.83 v
Current by using multimeter   0.22 mA

 

 

Task3

 

A/ Emf for parallel circut 6.03v

 

B/ find the currant

Finding the battery current by using mulitmeter / 2.85 mA

 

Resistors current

  1. 42 mA
  2. 95 mA
  3. 19 mA

 

c/

0.42 +0.95 +1.19 = 2.56 mA

 

 

d/

 

1/9.96 +1/5.56 +1/4.67 =2.022 K ohms

 

 

We find v by the help of multimeter which is 5.22v

I= V/R = 5.22/2.022=2.581 mA

 

 

 

 

Task4

 

Voltage and current for each different resistors

Voltage: 2.17v (5.56) ohms

Current : 0.6 mA

 

P=vI

2.17 x 0.6 = 1.302 w

 

V=1.95v

 

Current = 0.36 mA

(4.67)ohms

 

P=VI

=1.95 X 0.36 = 0.702 W

 

 

V=2.98V

I=0.28 mA

(9.96)ohms

 

P=VI

= 2.98 x 0.28

=0.8344 w

 

 

p(5)

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