Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1 m, 2 m, 4 m, 8 m respectively from the origin. The resulting gravitational potential due to this system at the origin will be
− G
− 4 G
A gas is taken through the cycle A → B → C → A, as shown. What is the net work done by the gas ?
2000 J
1000 J
Zero
− 2000 J
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied ?
Length = 50 cm, diameter = 0.5 mm
Length = 100 cm, diameter = 1 mm
Length = 200 cm, diameter = 2 mm
Length= 300 cm, diameter= 3 mm
The wettability of a surface by a liquid depends primarily on
viscosity
surface tension
density
angle of contact between the surface and the liquid
D.
angle of contact between the surface and the liquid
The value of angle of contact determines whether a liquid will spread on the surface.
The molar specific heats of an ideal gas at constant pressure and volume are denoted by CP and CV respectively. If and R is the universal gas constant, then CV is equal to
γR
A piece of iron is heated in a flame. If first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using
Stefan's law
Wien's displacement law
Kirchoff's law
Newton's law of cooling
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio of for the gas is
2
In the given (V-T) diagram, what is the relation between pressures p1 and p2 ?
p2 = p1
p2 > p1
p2 < p1
Cannot be predicted
The amount of heat energy required to raise the temperature of 1 g of helium at NTP, from T1K to T2K is
A wave travelling in the positive x-direction having displacement along y-direction as 1 m, wavelength 2 m and frequency of Hz is represented by
y = sin (x − 2t)