PhysicsPQR is a right angled triangle made of brass rod bent as shown. If it is heated to a high temperature the angle PQR. 

PQR is a right angled triangle made of brass rod bent as shown. If it is heated to a high temperature the angle PQR.

 

  1. A

    Increases

  2. B

    Decreases

  3. C

     remains same

  4. D

    becomes 135°

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