Physics-
General
Easy
Question
Two wires A and B of same length are made of same material. The figure represents the load F versus extension 
graph for the two wires. Then
- The cross sectional area of A is greater than that of B
- The elasticity of B is greater than that of A
- The cross sectional area of B is greater than that of A
- The elasticity of A is greater than that of B
The correct answer is: The cross sectional area of B is greater than that of A
Related Questions to study
Physics-
A wire suspended vertically from one of the ends is stretched by attaching a weight of 200 N to the lower end. If the weight stretches the wire by 1 mm. The elastic energy stored in the wire is :
A wire suspended vertically from one of the ends is stretched by attaching a weight of 200 N to the lower end. If the weight stretches the wire by 1 mm. The elastic energy stored in the wire is :
Physics-General
Physics-
The young’s modulus of the material of a rod is 
pascal. When the longitudinal strain is 0.04%, The energy stored per unit volume is
The young’s modulus of the material of a rod is pascal. When the longitudinal strain is 0.04%, The energy stored per unit volume is
Physics-General
Physics-
One mole of a monoatomic ideal gas occupies two chambers of a cylinder partitioned by means of a movable piston. The walls of the cylinder as well as the piston are thermal insulators. Initially equal amounts of gas fill both the chambers at 
. A coil is burnt in the left chamber which absorbs heat and expands, pushing the piston to the right. The gas on the right chamber is compressed until to pressure becomes 
. The final volume of left chamber is
One mole of a monoatomic ideal gas occupies two chambers of a cylinder partitioned by means of a movable piston. The walls of the cylinder as well as the piston are thermal insulators. Initially equal amounts of gas fill both the chambers at . A coil is burnt in the left chamber which absorbs heat and expands, pushing the piston to the right. The gas on the right chamber is compressed until to pressure becomes . The final volume of left chamber is
Physics-General
Physics-
A material has normal density 
and bulk modulus K. The increase in the density of the material when it is subjected to an external pressure 'p' from all sides is
A material has normal density and bulk modulus K. The increase in the density of the material when it is subjected to an external pressure 'p' from all sides is
Physics-General
Physics-
A tungsten wire, 0.5 mm in diameter, is just stretched between two fixed points at a temperature of 40°C. Determine the tension in the wire when the temperature falls to 20°C. (coefficient of linear expansion of tungsten 
; Young's modulus of tungsten 
)
A tungsten wire, 0.5 mm in diameter, is just stretched between two fixed points at a temperature of 40°C. Determine the tension in the wire when the temperature falls to 20°C. (coefficient of linear expansion of tungsten ; Young's modulus of tungsten )
Physics-General
Physics-
When the tension on a wire is 4 N its length is 
When the tension on the wire is 5 N its length is 
. Find its natural length.
When the tension on a wire is 4 N its length is When the tension on the wire is 5 N its length is . Find its natural length.
Physics-General
Physics-
A conductor having conductivity ' k ' and whose radius varies linearly with length L is as shown is figure
The radius of a conductor having uniform cross sectional area which gives same thermal resistance as the given conductor for same length with same conductivity is
A conductor having conductivity ' k ' and whose radius varies linearly with length L is as shown is figure
The radius of a conductor having uniform cross sectional area which gives same thermal resistance as the given conductor for same length with same conductivity is
Physics-General
Physics-
A linear rod of length L and uniform cross section area A is having thermal conductivity, which varies along its length as, 
where 
is measured from one of its ends as shown in figure. The two ends of the rod are maintained at temperatures of 
and 
, the rate at which heat flows at steady state is
A linear rod of length L and uniform cross section area A is having thermal conductivity, which varies along its length as, where is measured from one of its ends as shown in figure. The two ends of the rod are maintained at temperatures of and , the rate at which heat flows at steady state is
Physics-General
Physics-
Two solid spheres of same material but diameters in the ratio of 5:4 are at temperatures 227°C and 127°C respectively. The temperature of the surrounding is 27°C and Stefan's law holds. Calculate the ratio of rates of loss of heat of the two spheres?
Two solid spheres of same material but diameters in the ratio of 5:4 are at temperatures 227°C and 127°C respectively. The temperature of the surrounding is 27°C and Stefan's law holds. Calculate the ratio of rates of loss of heat of the two spheres?
Physics-General
Physics-
A cylinder of radius R and length l is made up of a substance, whose thermal conductivity K varies with the distance from the axis as 
Deter mine the effective thermal conductivity between the flat faces of the cylinder.
A cylinder of radius R and length l is made up of a substance, whose thermal conductivity K varies with the distance from the axis as Deter mine the effective thermal conductivity between the flat faces of the cylinder.
Physics-General
Physics-
Two rods(One semi - circular and other straight) of same material and of same cross -sectional area are joined as shown in the figure. The points A and B are maintained at different temperatures. Find the ratio of the heat transferred through a cross - section of a semi - circular rod to the heat transferred A through a cross section of the straight rod in a given time.
Two rods(One semi - circular and other straight) of same material and of same cross -sectional area are joined as shown in the figure. The points A and B are maintained at different temperatures. Find the ratio of the heat transferred through a cross - section of a semi - circular rod to the heat transferred A through a cross section of the straight rod in a given time.
Physics-General
Physics-
Four identical rods AB,CD,CF and DE are connected as shown in figure. The length, cross- sectional area and thermal conductivity of each rod are L,A, K respectively. The ends A, E, F are maintained at temperature 
and 
respectively. Assuming no loss of heat to the atmosphere, calculate the temperature at B [CB = BD].
Four identical rods AB,CD,CF and DE are connected as shown in figure. The length, cross- sectional area and thermal conductivity of each rod are L,A, K respectively. The ends A, E, F are maintained at temperature and respectively. Assuming no loss of heat to the atmosphere, calculate the temperature at B [CB = BD].
Physics-General
Physics-
Figure shows a cylinder of cross sectional area A and total length 4 L, containing 
moles of oxygen each at temperature 
and 
are separated by a fixed piston of length 2 L and thermal conductivity K. Find the rate of heat flow through the piston after time 
. (Given 
)
Figure shows a cylinder of cross sectional area A and total length 4 L, containing moles of oxygen each at temperature and are separated by a fixed piston of length 2 L and thermal conductivity K. Find the rate of heat flow through the piston after time . (Given )
Physics-General
Physics-
Solid copper cube of edge 1 cm is suspended an evacuated enclosure. Its temperature is found to fall from 100°C to 99°C in 100 seconds. Another solid copper cube of edge 2 cm with similar surface nature is suspended in similar manner. Find the time required for this cube to cool from 100°C to 99°C.
Solid copper cube of edge 1 cm is suspended an evacuated enclosure. Its temperature is found to fall from 100°C to 99°C in 100 seconds. Another solid copper cube of edge 2 cm with similar surface nature is suspended in similar manner. Find the time required for this cube to cool from 100°C to 99°C.
Physics-General
Physics-
The graph shown give the temperature along x-axis that extends directly through a wall consisting of three layers A, B and C. The air temperature on one side of the wall differ from that on the other side. Thermal conduction through the wall is steady. Out of the three layers A, B and C thermal conductivity is greatest for layer
The graph shown give the temperature along x-axis that extends directly through a wall consisting of three layers A, B and C. The air temperature on one side of the wall differ from that on the other side. Thermal conduction through the wall is steady. Out of the three layers A, B and C thermal conductivity is greatest for layer
Physics-General
