PDF chapter test TRY NOW
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
\(\pm\)
\(+\)
Substitute the values in the formula,
Thickness of the ball : \(cm\)
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