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 $$\frac{{{\text{AE}}}}{{{\text{P}}l}}$$
Kirchoff s law applies to __________ radiation.
A Total
B Monochromatic
C Both A & B
D Neither A nor B
Fourier's law of heat conduction applies to __________ surfaces.
A Isothermal
B Non-isothermal
C Both A and B
D Neither A and B
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 $$\frac{{\text{P}}}{{{\text{ma}}}} = 0$$
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
Stefen's block body radiation law can also be derived from __________ law.
A Kirchoffs
B Planck's
C Fourier's
D None of these
The law applies to _____. (Choose the appropriate word to fill in the gap)
A all and sundry
B all in all
C each other
D one anohter
Newton's Third Law of Motion applies to which of the following situations?
A When a person jumps from the boat to the river, the boat goes backwards
B Passengers standing in a bus fall in the back direction, when the stationary bus suddenly moves
C When a person falls on the cement floor, he gets hurt
D While catching a fast moving cricket ball, a fielder puts his hands backwards
Kirchhoff’s voltage law applies to circuits with
A Nonlinear elements only
B Linear elements only
C Linear, nonlinear, active and passive elements
D Linear, nonlinear, active, passive, time varying as wells as time-invariant elements
Fourier's law applies to the heat transfer by
A Convection
B Radiation
C Conduction
D All of the above

Next steps