QUESTIONS FOR GROUP 5

1. GROUP 5
KentTumanda Bonie Nagac
NikkoLiguan Bryan KentBalbanida
CraytonRae Enot Frans KristanDelante
AlexanderEmpleo JeyvinTambulian
Jaypaul Haclad Mark JosephRoiles
AshAmantiad Dave AnthonySaplot
1. What are the twobasic typesof digital ohm-meter?
Ans:successive approximationdigitalohm-meter;currentsource digital ohm-meter
2. What are the three basicelectroniccomponentsneededfortime measurement?
Ans:oscillator,electronicswitch,counter
3. True or False:DCpowercouldbe obtainedbymultiplyingcurrenttovoltage.
Ans: True
4. Factors that affectIRtest results?
Ans.Temperature,Humidity
5. What are the 3 waysto connecta Watt-meter?
Ans.Direct,Semi-direct,Indirect
6. True or False:The voltmeterhasalow internal resistance.
Ans:False
7.
Findthe powersuppliedinthe figure usingthree ammetermethod.
𝐼2 =
𝑉
𝑅
=
20
10
= 5 𝐴
𝑃 =
10
2
[(10)2 − (5)2 − (5)2]
𝑃 = 5(100 − 25 − 25)
𝑃 = 5(50)
𝑃 = 250 𝑊

2. 8. You have decidedtoinstall three meterlonggroundrodsas part of your groundingsystem.To
measure the soil resistivityata depthof three meters,we discussedaspacingbetweenthe test
electrodesof six meters.Assumethe readingof the resistance aftertestingis100Ω.
Findthe soil resistivity.
Given:
a = 6meters(betweenspacing)
b = 3meters(depthof electrode)
R = 100Ω
Req:Soil Resistivity
Solution:
Since a>b, then:
ρ = 2πaR
ρ = 2π(6meters)(100Ω)
ρ = 3769.91Ω.m