Which of the following term denotes the internal reaction force per unit area developed as a result of applied external force ?
A. Stress
B. Friction
C. Moment of Inertia
D. tension
✅ The correct answer is option A.
Which among the following defines cohesive force?
A. the force of attraction acting between the molecules of same material
B. the force of attraction acting between the molecules of different material
C. the force of attraction acting between the atoms of same material
D. None of the above
✅ The correct answer is option A.
The ideal fluid which is a hypothetical fluid should contain _______?
A. Zero Viscosity Only
B. Zero Compressibility Only
C. Zero Viscosity & Zero Compressibility
D. None of the above
✅ The correct answer is option C.
Which among the following is true about conduction, convection and radiation mode of transfer of heat?
A. A Medium is required for conduction but not required for convection and radiation
B. A medium is required for conduction, convection and radiation
C. A medium is required for conduction and convection but not required for radiation
D. A medium is not required for conduction and convectio, radiation
✅ The correct answer is option C.
Which among the following is true regarding Sound Waves?
A. They are longitudinal waves and material medium is not required for their propagation
B. They are transverse waves and material medium is required for their propagation
C. They are longitudinal waves and material medium is required for their propagation
D. They are transverse waves and material medium is not required for their propagation
✅ The correct answer is option C.
Which among the following principle is used by Bats?
A. RADAR (Radio Detective & Ranging
B. SONAR (Sound Navigation & Ranging
C. law of reflection
D. law of diffraction
✅ The correct answer is option B.
Which among the following is true about Total Internal Reflection?
A. A ray passing from rarer to denser medium and not able to pass to denser medium at an angle greater than critical angle
B. A ray passing from denser to rarer medium and not able to pass to rarer medium at an angle greater than critical angle
C. A ray passing from either denser to rarer medium or rarer to denser medium and not able to pass any medium at an angle smaller than critical angle
D. None of the above
✅ The correct answer is option B.
When light from some sources enters to the earth‘s atmosphere, it gets scattered. Which among the following is a reason behind scattering?
A. Various wavelengths of light
B. dust, smoke and gas molecules
C. atmospheric pressure
D. None of the above
✅ The correct answer is option B.
Which among the following is true about latent heat ?
A. It causes change in temperature as well as change in state or phase
B. It causes change in temperature only
C. It causes change in state or phase but not in temperature
D. It causes change in Pressure
✅ The correct answer is option C.
Which among the following is a property of Insulator?
A. The electrons of the outer orbits are loosely bound to the nucleus , however can not flow through them
B. The electrons of the outer orbits are tightly bound to the nucleus and can not flow through them
C. The electrons of the outer orbits are loosely bound to the nucleus , and can flow through them
D. None of the above
✅ The correct answer is option B.