Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Physics Thermal Properties of Matter Heat transfer
Which of the following statements is true regarding transfer of heat through the process of convection ?
(A) It takes place only in gases.
(B) Heat flows in upward direction only.
(C) Physical contact is not essential.
(D) Heat is transferred by vibrational motion of particles.
1
(A) and (B)
2
Only (C)
3
Only (A)
4
(A) and (D)