
Trắc nghiệm vui - vật lý 9
Quiz
•
Physical Ed
•
KG - 8th Grade
•
Practice Problem
•
Easy
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hệ thức Định luật Ohm:
I=U/R
I=R/U
U=I/R
R=U/I
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong đoạn mạch gồm hai điện trở R1=R2=6Ω mắc song song. Điện trở tương đương của đoạn mạch là
2Ω
3Ω
4Ω
6Ω
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công thức tính điện trở dây dẫn:
R=ρS/l
R=S.l/ρ
R=Sρ/l
R=ρl/S
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cường độ dòng điện có đơn vị là:
V
A
mm
U
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kí hiệu của điện trở suất là:
R
P
ρ
l
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong đoạn mạch gồm hai điện trở R1và R2 mắc nối tiếp. Điện trở tương đương của đoạn mạch là:
Rtd < R1
Rtd < R1
Rtd < R1+R2
Rtd = R1+R2
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