Kuis - Perpindahan Kalor

Quiz
•
Physics
•
11th Grade
•
Easy
Ryan Ronaldie
Used 3+ times
FREE Resource
5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Diantara alat elektronik dibawah ini, manakah yang menggunakan konsep perpindahan kalor secara konduksi ?
Solder Listrik
Kipas Angin
Televisi
Sepeda
Answer explanation
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Perpindahan Kalor yang disertai dengan perpindahan massa atau partikel zat perantaranya disebut ?
Konveksi
Radiasi
Pemuaian
Konduksi
Answer explanation
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Batang logam dengan panjang 3 meter memiliki luas penampang 30 cm2 dan perbedaan suhu kedua ujungnya 60oC. Jika koefisien konduksi termal 0,2 kal m-1 s -1 oC-1 , tentukan laju aliran kalor !
1,20 kal s -1
0,21 kal s -1
0,012 kal s -1
0,12 kal s -1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suatu fluida dengan koefisien konveksi termal 0,01 kal m-1 s -1 oC-1 memiliki luas penampang aliran 40 cm2. Jika fluida tersebut mengalir dari dinding yang bersuhu 100oC ke dinding lainnya yang bersuhu 30oC dan kedua dinding sejajar, berapakah besar kalor yang dirambatkan ?
1,6 . 10-3kal s-1
2,8 . 10-3kal s-1
0,28 . 10-3kal s-1
2,08 . 10-3kal s-1
Answer explanation
H = k A ΔT
= (0,01).(40.10-4).(100-30)
= 2,8 x 10-3 kal s-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah lampu pijar menggunakan kawat wolfram dengan luas 10-4 m2 dan emisivitasnya 0,5. Bila bola lampu tersebut berpijar pada suhu 1000K selama 10 sekon (σ= 5,67 . 10-8W m-1 K -4), hitunglah jumlah energi radiasi yang dipancarkan !
25,35 J
23,85 J
25,83 J
28,35J
Answer explanation
H = e σ A T4 Δt
= (0,5).(5,67 . 10-8).(10-4).(1000)4.(10)
= 28,35 J
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