Bissoy.com
Doctors Medicines MCQs Q&A

Related Questions

For better resistance welding, the metal must have
P. high electrical resistivity and low melting point
Q. high thermal conductivity
R. high electrical resistivity and high melting point
S. low thermal conductivity
Consider the following statements about thermal conductivity: 1) Thermal conductivity decreases with increasing molecular weight 2) Thermal conductivity of non-metallic liquids generally decreases with increasing temperature 3) Thermal conductivity of gases and liquids is generally smaller than that of solids Which of the above statements are correct?
Which of the following statements regarding superconducting materials are correct when a large number of metals become superconducting below a temperature? 1) The resistivity ρ of the superconductor is zero. 2) The magnetic flux density B vanishes through the substance. 3) Ferromagnetic and Antiferromagnetic metals are good examples of superconducting materials.
Which of the following materials is best suited to make a fuse wire? Material Melting Point Resistivity X High Low Y High High Z Low High W Low Low
Which of the following is the correct definition of mole? (A) It is equal to the gram atomic mass of the substance (B) It contains 6.022 × 1020 atoms of the given substance (C) It is equal to the gram molecular weight of the substance (D) It contains 6.022 × 1023 molecules of the given substance
Which of the following statement is correct? Statement 1: The addition of hydrogen to a substance and the removal of the oxygen from a substance is called oxidation. Statement 2: The addition of oxygen in a substance and the removal of  Hydrogen from a substance is called reduction.  
The electrical resistivity of many metals and alloys drops suddenly to zero when they are cooled to a low temperature (i.e. nearly equal to liquid helium temperature). Such materials (metals and alloys) are known as
The following question has two premises and two conclusions. If the premises re assumed to be true (irrespective of factuality), then, in respect of each of the items given below, which of the following conclusions follow logically? Premises: All metals are grey in colour. Some metals are heavy. Conclusion: I. All heavy metals are grey in colour. II. All light metals are not grey in colour.
A low value of time constant can be achieved for a thermocouple by (i) Increasing the wire diameter (ii) Increasing the value heat transfer coefficient (iii) Use light metals of low density and low specific heat
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?