PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. Inian and Ezhilan argue about the light year. Inian tells that it is \(9.46 \times 10^{15}\ m\) and Ezhilan argues that it is \(9.46 \times 10^{12}\ m\). Who is right?
 
Justify your answer.
 
Answer:
 
The magnitude of light year \(=\) 
 
 
So,  gave a correct answer.
  
2. The main scale reading while measuring the thickness of a rubber ball using Vernier Caliper is 7 \(cm\) and the Vernier scale coincidence is 6. Find the radius of the ball.
 
Solution:
 
From the data given,
 
Main scale reading (\(MSR\)) \(=\) 7 \(cm\)

Vernier scale coincidence (\(VSC\)) \(=\) 6
 
Let us consider,
 
Least count (\(LC\)) \(=\)  \(cm\)
 
The formula to calculate the thickness of the ball,
 
Answer variants:
\(\times\)
\(-\)
LC
VSC
MSR
\(\pm\)
\(+\)
 
Thickness=iiiii
 
Substitute the values in the formula,
 
Thickness of the ball :  \(cm\)