Author: Study Clue

A metal ring just fits a metal sphere at 20°C. When both are heated by the same ΔT, the sphere

A platinum resistance thermometer works mainly because platinum’s electrical resistance changes with A Pressure only B Volume change C Light

When a metal rod is rigidly fixed at both ends and heated, the rod mainly develops A Zero expansion B

A Celsius temperature is converted to Kelvin by using which relation A K = C + 273 B K =

Which statement best defines temperature in thermal physics A Average kinetic energy B Amount of heat C Total internal energy

Two equal masses M separated by 2r. Gravitational potential at midpoint is A −GM/r−GM/r B −GM/2r−GM/2r C Zero potential D

Gravitational field at distance r from mass M is A GM/rGM/r B G/r2G/r2 C GM/r2GM/r2 D M/r2M/r2 Explanation Gravitational field

If m1m1 becomes 3 times, gravitational force becomes A B. One-third B C. Nine times C D. Unchanged force D

Gravitational force between two bodies depends directly on A Difference of masses B Sum of masses C Ratio of masses

Which law gives gravitational force between two masses separated by distance r A A. Coulomb’s law B C. Hooke’s law