Physics-
General
Easy
Question
A hemispherical portion of radius R is removed from the bottom of a cylinder of radius R. The volume of the remaining cylinder is V and its mass is M. It is suspended by a string in a liquid of density 
where it stays vertical. The upper surface of the cylinder is at a depth h below the liquid surface. The force on the bottom of the cylinder by the liquid is
- Mg
The correct answer is:
Related Questions to study
physics-
Three graphs marked as 1, 2, 3 representing the variation of maximum emissive power and wavelength of radiation of the sun, a welding arc and a tungsten filament. Which of the following combination is correct
Three graphs marked as 1, 2, 3 representing the variation of maximum emissive power and wavelength of radiation of the sun, a welding arc and a tungsten filament. Which of the following combination is correct
physics-General
physics-
If emissivity of bodies X and Y are ex and ey and absorptive power are Ax and Ay then
If emissivity of bodies X and Y are ex and ey and absorptive power are Ax and Ay then
physics-General
physics-
An ideal black body at room temperature is thrown into a furnace. It is observed that
An ideal black body at room temperature is thrown into a furnace. It is observed that
physics-General
physics-
Three rods made of the same material and having the same cross-section have been joined as shown in the figure. Each rod is of the same length. The left and right ends are kept at 0°C and 90°C respectively. The temperature of the junction of the three rods will be
Three rods made of the same material and having the same cross-section have been joined as shown in the figure. Each rod is of the same length. The left and right ends are kept at 0°C and 90°C respectively. The temperature of the junction of the three rods will be
physics-General
physics-
The plots of intensity versus wavelength for three black bodies at temperature T1, T2 and T3 respectively are as shown. Their temperatures are such that
The plots of intensity versus wavelength for three black bodies at temperature T1, T2 and T3 respectively are as shown. Their temperatures are such that
physics-General
physics-
Three identical point charges, as shown are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point M of the hypotenuse
Three identical point charges, as shown are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point M of the hypotenuse
physics-General
physics-
Two identical conductors of copper and aluminium are placed in an identical electric fields. The magnitude of induced charge in the aluminium will be
Two identical conductors of copper and aluminium are placed in an identical electric fields. The magnitude of induced charge in the aluminium will be
physics-General
physics-
Four charges are arranged at the corners of a square ABCD. as shown in the adjoining figure. The force on the charge kept at the centre O is
Four charges are arranged at the corners of a square ABCD. as shown in the adjoining figure. The force on the charge kept at the centre O is
physics-General
physics-
There is an electric field E in X-direction. If the work done on moving a charge 0.2 C through a distance of 2 m along a line making an angle 60° with the X-axis is 4.0, what is the value of E.
There is an electric field E in X-direction. If the work done on moving a charge 0.2 C through a distance of 2 m along a line making an angle 60° with the X-axis is 4.0, what is the value of E.
physics-General
physics-
As shown in the fig. charges +q and –q are placed at the vertices B and C of an isosceles triangle. The potential at the vertex A is
As shown in the fig. charges +q and –q are placed at the vertices B and C of an isosceles triangle. The potential at the vertex A is
physics-General
physics-
A tin nucleus has charge +50e. If the proton is at a distance 10–12m from the nucleus, then the potential V at this position is [charge on the proton = 1.6×10–19C]
A tin nucleus has charge +50e. If the proton is at a distance 10–12m from the nucleus, then the potential V at this position is [charge on the proton = 1.6×10–19C]
physics-General
physics-
An electron which is initially at rest is accelerated through a potential difference of one volt. The energy acquired by the electron is
An electron which is initially at rest is accelerated through a potential difference of one volt. The energy acquired by the electron is
physics-General
physics-
A charge q is placed at the centre of the open end of a cylindrical vessel. The flux of the electric field through the surface of the vessel is
A charge q is placed at the centre of the open end of a cylindrical vessel. The flux of the electric field through the surface of the vessel is
physics-General
physics-
Fig. shows a distribution of charges. The flux of electric field due to these charges through the surface S is
Fig. shows a distribution of charges. The flux of electric field due to these charges through the surface S is
physics-General
physics-
As per fig. a point charge +q is placed at the origin O. Work done in taking another point charge –Q from the point A [Co-ordinates (0,a)] to another point B [Co-ordinates (a, 0)] along the straight path AB is :
As per fig. a point charge +q is placed at the origin O. Work done in taking another point charge –Q from the point A [Co-ordinates (0,a)] to another point B [Co-ordinates (a, 0)] along the straight path AB is :
physics-General
