Related Questions

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, $$l$$ = Original length of the body, A = Cross-sectional area of the body and E = Young's modulus for the material of the body)
A $$\frac{{{\text{P}}l{\text{A}}}}{{\text{E}}}$$
B $$\frac{{{\text{P}}l}}{{{\text{AE}}}}$$
C $$\frac{{\text{E}}}{{{\text{P}}l{\text{A}}}}$$
D $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
Following viruses spread via blood stream associated with lymphocytes
A Epstein-barr virus
B Rubella virus
C Cytomegalo virus
D Polio virus
E Toga virus
CD4 lymphocytes
A Play role in delayed type of hypersensitivity
B Possess CD3 protein on their surface
C Secrete IL-1
D Help B ceil to develop into plasma cei!
E Play role in granuloma formation
The fibrous membranes surrounding organs in the human body are tough _______ add strength to the parts of the body they cover.
A moreover
B furthermore
C since
D and
When human body is infected by infection __________ type of cells are activated to defend the body.
A erythrocytes
B leukocytes
C lymphocytes
D monocytes
The human body feels comfortable when the heat stored in the body is
A Positive
B Negative
C Zero
D None of these
The human body feels comfortable when the heat stored in the body is -
A Positive
B Negative
C Zero
D None
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body and $$\delta $$ = Static deflection of the body)
A $$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{s}}}{{\text{m}}}} $$
B $$\frac{1}{{2\pi }} \times \sqrt {\frac{{\text{g}}}{\delta }} $$
C $$\frac{{0.4985}}{{\sqrt \delta }}$$
D Any one of these
If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
A Change
B Does not change
C Changes periodically
D None of these
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,
A P + ma = 0
B P - ma = 0
C P × ma = 0
D $$\frac{{\text{P}}}{{{\text{ma}}}} = 0$$

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