Convection MCQs with Answers PDF Download – Test 54

MCQ 266: Convectional current only occurs in:

1. solids
2. liquids
3. gases
4. liquids and gases both

MCQ 267: Gases are:

1. very compressible
2. very little compressible
3. incompressible
4. B and C both

MCQ 268: Virtual image is of same size as the object' is a true statement of plane mirror image.:

1. Right
2. Wrong
3. May be right or may be wrong
4. Neither right nor wrong

MCQ 269: Knocking a nail into a wooden block with a hammer involves conversion between different forms of energy, which of the following choices present this conversion in correct order.:

1. chemical energy → gravitational potential energy → kinetic energy → (sound energy + heat energy)
2. chemical energy → kinetic energy → gravitational potential energy → (sound energy + heat energy)
3. chemical energy → (sound energy + heat energy) → kinetic energy → gravitational potential energy
4. (sound energy + heat energy) → chemical energy → kinetic energy → gravitational potential energy

MCQ 270: We can say that one watt is defined as:

1. rate of work done or energy conversion of one joule per second
2. rate of time of one second per joule
3. rate of distance of one meter per joule
4. rate of work done or energy conversion of one joule per meter