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 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 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.
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 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.
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.
What is the mean value of g at earth‘s surface?
A. 0.98 meter per second
B. 9.8 meter per second
C. 9.8 meter per second square
D. 0.98 meter per second square
✅ The correct answer is option C.
The value of acceleration due to gravity is __________?
A. Minimum at equator and maximum at poles
B. maximum at equator and minimum at poles
C. equal at poles and equator
D. None of the above
✅ The correct answer is option A.
Which among the following defines gravitational mass?
A. Ratio of weight of a body and acceleration due to gravity
B. Ratio of Acceleration due to gravity and weight of a body
C. matter contained in a body
D. None of the above
✅ The correct answer is option A.
The scientists have discovered that Milky Way is having two components, the disc and spherical. What may be the central object of Milky Way?
A. A Black Hole
B. A Neuron star
C. Vaccum
D. A Large Magellanic Cloud
✅ The correct answer is option A.