Model Questions for Scientific Assistant (IMD) Exam (Paper-2) PHYSICS - Set 41
Model Questions for Scientific Assistant (IMD) Exam (Paper-2)
PHYSICS - Set 41
Write and Discuss Your Answer with Q.No in Comment Box at the Bottom of Post.
1. Tensile strain is equal to
A. Force per unit area
B. Force per unit volume
C. Extension per unit length
D. Force per unit length
2. In elastic collisions,
A. only total momentum of colliding objects is conserved.
B. only total kinetic energy is conserved.
C. both of momentum and total kinetic energy are conserved.
D. neither momentum of colliding bodies nor total kinetic energy are
recoverable.
3. Total angular momentum of a body is given by
A. I ×
w; where I: moment of inertia of body, ù: angular velocity
B. I² ×
w; where I: moment of inertia of body, ù: angular velocity
C. I² ×
w²; where I: moment of inertia of body, ù: angular velocity
D. I × w²; where I: moment of inertia of body, ù: angular velocity
4. Force that acts on a mass of 1 g and gives it an acceleration of 1 cms-2 is defined as
A. 1 newton
B. 1 dyne
C. 1 pound-force
D. 1 pa-force
5. An object moving in a circle of radius ‘r’ with a constant speed ‘v’ has a constant acceleration towards center equal to
A. v²/ r
B. v/ r
C. v²×r
D. v×r
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6. Einstein’s mass-energy relationship states that if mass decreases by m, energy released E is given by
A. DE
= Dm
× c, where “c” denotes speed of light.
B. DE
= Dm
× c², where “c” denotes speed of light.
C. DE
= Dm
D c, where “c” denotes speed of light.
D. DE
= Dm
D c², where “c” denotes speed of light.
7. Bernoulli’s principle states that, for streamline motion of an incompressible non-viscous fluid:
A. pressure at any part + kinetic energy per unit volume = constant
B. kinetic energy per unit volume + potential energy per unit volume = constant
C. pressure at any part + potential energy per unit volume = constant
D. pressure at any part + kinetic energy per unit volume + potential energy per
unit volume = constant
8. While Young’s modulus ‘E’ relates to change in length and bulk modulus ‘K’ relates to change in volume, modulus of rigidity ‘G’ relates to change in:
A. weight
B. density
C. shape
D. temperature
9. Young’s modulus is defined as
A. tensile strain/tensile stress
B. tensile stress/tensile strain
C. tensile stress × tensile strain
D. length/area
10. Velocity of escape is equal to
A. r ×
Ö(2g);
where r: radius of Earth or any other planet for that matter, g: gravitational
field strength
B. g × Ö(2r);
where r: radius of Earth or any other planet for that matter, g: gravitational
field strength
C. Ö(2g)
D r; where r: radius of Earth or any other planet for that matter, g:
gravitational field strength
D. Ö(2gr);
where r: radius of Earth or any other planet for that matter, g: gravitational
field strength
