A. internal energy
B. heat supply
C. pressure
D. volume
Related Mcqs:
- In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?
A. Metal stable state
B. Normal state
C. Inverted population
D. All the above - Which one is the derived quantity in SI units _____________?
A. Electric current
B. Electric charge
C. Plane angle
D. Amount of substance - An ideal standard of measurement of a base quantity has characteristics_______________?
A. Accessible
B. Invariable
C. Transportable
D. Only a and b are correct - Which one of the following is not vector quantity _______?
A. Acceleration
B. Displacement
C. Speed
D. ForceSubmitted by: Rashid Mehmood
- An artificial satellite revolves round the Earth in circular orbit, which quantity remains constant?
A. Angular Momentum
B. Angular Displacement
C. Linear Velocity
D. None of the aboveSubmitted by: Naveed Tahir
- Excited atoms return to their ground state in_______________?
A. 10-10s
B. 10-8s
C. 10-6s
D. 10-9s - Ground state energy of the 4th orbit in a H-atom is_____________?
A. 13.60 eV
B. 3.40 eV
C. 0.85 eV
D. 1.51 eV - In normal state of energy the incident high energy photons will be______________?
A. Stimulated
B. Absorbed
C. Cause X-ray emission
D. Cause laser production - The metastable state for an atom in laser light is_____________?
A. 10-4 sec
B. 10-5 sec
C. 10-3 sec
D. 10-8 sec - Numerical value of Boltzmanns constant is______________?
A. 1.38×10-31JK-1
B. 3.18×10-31JK-1
C. 3.18×10-23JK-1
D. 1.38×10-23JK-1
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