Explore topic-wise MCQs in Physics Questions and Answers.

This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

A rod having α = 1*10-5per °C and length of 70cm has one of its end rigidly connected to another rod of length 1m and α= 0.5*10-5per °C. Find the new length of the two joined rods when their temperature is increased by 30℃.

A. 170.021cm
B. 169.021cm
C. 171.031cm
D. 170.031cm
Answer» B. 169.021cm
Discussion
2.

What is the value of coefficient of area expansion for a sphere? Assume coefficient of linear expansion is α.

A. 2α
B. α
C. 3α
D. α/2
Answer» B. α
Discussion
3.

A rod is lying on the ground with both ends free. It has a length of 1m. Coefficient of linear expansion equal to 1.1*10-5per &degC. Calculate the strain when the change in temperature is 10K.

A. 11*10-5
B. 1.1*10-5
C. 0
D. 311.3*10-5
Answer» D. 311.3*10-5
Discussion