22. In a bridge rectifier, the number of diodes required is?
A. 1
B. 2
C. 3
D. 4
23. If two objects are each in thermal equilibriam with a third object, then the two objects are in thermal equilibrium with each other. This is a statement of
A. law of heat conservation/
B. Zeroth law of thermedynamics
C. First law of thermodynamics
D. law of thermal preservation
24. Which law of thermodynamics is the basis of temperature measurement ?
A. Zeroth law of thermodynamics
B. First law of thermodynamics
C. Second law, of thermodynamics
D. none of the above
25. law of thermodynamics is also known as:
I. Law of conservation of energy
U. Law of conservation of mass
III. Law of multiple proportions
IV. Law of disproportionation
A. I-IV
B. II only
C. III\&IV only
D. I only