Maths-
General
Easy
Question
If
and theperiod of
is
, then 
- 4
- 3
- 2
- 1
The correct answer is: 2
Related Questions to study
physics-
The adjoining diagram shows the spectral energy density distribution
of a black body at two different temperatures. If the areas under the curves are in the ratio 16 : 1, the value of temperature
is

Area under
The adjoining diagram shows the spectral energy density distribution
of a black body at two different temperatures. If the areas under the curves are in the ratio 16 : 1, the value of temperature
is

physics-General
Area under
physics-
Five identical rods are joined as shown in figure. Point
and
are maintained at temperature
and
respectively. The temperature of junction
will be

If thermal resistance of each rod is considered
then, the given combination can be redrawn as follows




Five identical rods are joined as shown in figure. Point
and
are maintained at temperature
and
respectively. The temperature of junction
will be

physics-General
If thermal resistance of each rod is considered
then, the given combination can be redrawn as follows




Maths-
If
, then
_______________
If
, then
_______________
Maths-General
physics-
Which one of the following is
graph for perfectly black body?
is the frequency of radiation with maximum intensity,
is the absolute temperature.

Intensity is directly proportional to energy.
Which one of the following is
graph for perfectly black body?
is the frequency of radiation with maximum intensity,
is the absolute temperature.

physics-General
Intensity is directly proportional to energy.
physics-
Three rods made of same material and having same cross-section are joined as shown in the figure. Each rod is of same length. The temperature at the junction of the three rods is

Let the temperature of function be
, then



Or
Or
Or
Or

Or
Or
Or
Or
Three rods made of same material and having same cross-section are joined as shown in the figure. Each rod is of same length. The temperature at the junction of the three rods is

physics-General
Let the temperature of function be
, then



Or
Or
Or
Or

Or
Or
Or
Or
physics-
The figure shows a glass tube (linear co-efficient of expansion is
) completely filled with a liquid of volume expansion co-efficient
On heating length of the liquid column does not change. Choose the correct relation between
and 

When length of the liquid column remains constant, then the level of liquid moves down with respect to the container, thus
must be less than 
Now we can write
Since
Hence
Now we can write
Since
Hence
The figure shows a glass tube (linear co-efficient of expansion is
) completely filled with a liquid of volume expansion co-efficient
On heating length of the liquid column does not change. Choose the correct relation between
and 

physics-General
When length of the liquid column remains constant, then the level of liquid moves down with respect to the container, thus
must be less than 
Now we can write
Since
Hence
Now we can write
Since
Hence
physics-
The spectrum of a black body at two temperatures
and
is shown in the figure. Let
and
be the areas under the two curves respectively. The value of
is

Area under given curve represents emissive power and emissive power 

The spectrum of a black body at two temperatures
and
is shown in the figure. Let
and
be the areas under the two curves respectively. The value of
is

physics-General
Area under given curve represents emissive power and emissive power 

physics-
In a vertical U-tube containing a liquid, the two arms are maintained at different temperatures
and
The liquid columns in the two arms have heights
and
respectively. The coefficient of volume expansion of the liquid is equal to

Suppose, height of liquid in each arm before rising the temperature is
.

With temperature rise height of liquid in each arm increases
Also


With temperature rise height of liquid in each arm increases
Also
In a vertical U-tube containing a liquid, the two arms are maintained at different temperatures
and
The liquid columns in the two arms have heights
and
respectively. The coefficient of volume expansion of the liquid is equal to

physics-General
Suppose, height of liquid in each arm before rising the temperature is
.

With temperature rise height of liquid in each arm increases
Also


With temperature rise height of liquid in each arm increases
Also
physics-
A bimetallic strip consists of metals
and
. It is mounted rigidly at the base as shown. The metal
has a higher coefficient of expansion compared to that for metal
. when bimetallic strip is placed in a cold bath

The metal X has a higher coefficient of expansion compared to that for metal Y so, on placing bimetallic strip in a cold bath, X will shrink more than
. Hence, the strip will bend towards the left.
A bimetallic strip consists of metals
and
. It is mounted rigidly at the base as shown. The metal
has a higher coefficient of expansion compared to that for metal
. when bimetallic strip is placed in a cold bath

physics-General
The metal X has a higher coefficient of expansion compared to that for metal Y so, on placing bimetallic strip in a cold bath, X will shrink more than
. Hence, the strip will bend towards the left.
physics-
The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity
and 2
and thickness
and 4
, respectively are
and
. The rate of heat transfer through the slab, in a steady state is
, with
equals to

Let the temperature of common interface be
. Rate of heat flow

=
And
=
In steady state, the rate of heat flow should be same in whole system

= 


(i)
Hence, heat flow from composite slab is

=
(ii)
Accordingly,
(iii)
By comparing Eqs. (ii) and (iii), we get

And
In steady state, the rate of heat flow should be same in whole system
Hence, heat flow from composite slab is
=
Accordingly,
By comparing Eqs. (ii) and (iii), we get
The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity
and 2
and thickness
and 4
, respectively are
and
. The rate of heat transfer through the slab, in a steady state is
, with
equals to

physics-General
Let the temperature of common interface be
. Rate of heat flow

=
And
=
In steady state, the rate of heat flow should be same in whole system

= 


(i)
Hence, heat flow from composite slab is

=
(ii)
Accordingly,
(iii)
By comparing Eqs. (ii) and (iii), we get

And
In steady state, the rate of heat flow should be same in whole system
Hence, heat flow from composite slab is
=
Accordingly,
By comparing Eqs. (ii) and (iii), we get
physics-
A solid material is supplied with heat at constant rate and the temperature of the material changes as shown. From the graph, the false conclusion drawn is

A solid material is supplied with heat at constant rate and the temperature of the material changes as shown. From the graph, the false conclusion drawn is

physics-General
physics-
The energy distribution
with the wavelength
for the black body radiation at temperature
is shown in the figure. As the temperature is increased the maxima will

According to Wien’s displacement law
. Hence, it temperature increases
decreases
peak of the
curve shift towards left
The energy distribution
with the wavelength
for the black body radiation at temperature
is shown in the figure. As the temperature is increased the maxima will

physics-General
According to Wien’s displacement law
. Hence, it temperature increases
decreases
peak of the
curve shift towards left
physics-
A metal rod of length
has cross sectional areas
and
as shown in figure. The ends are maintained at temperatures
and
. The temperature at middle point
is

Let
be temperature of middle point
and in series rate of heat flow is same


A metal rod of length
has cross sectional areas
and
as shown in figure. The ends are maintained at temperatures
and
. The temperature at middle point
is

physics-General
Let
be temperature of middle point
and in series rate of heat flow is same


physics-
The coefficient of thermal conductivity of copper is nine times that of steel. In the composite cylindrical bar show in figure, what will be the temperature at the junction of copper ad steel?

Let the temperature of junction be 



3
12

3
12
The coefficient of thermal conductivity of copper is nine times that of steel. In the composite cylindrical bar show in figure, what will be the temperature at the junction of copper ad steel?

physics-General
Let the temperature of junction be 



3
12

3
12
Maths-
Which function is shown in graph?

Which function is shown in graph?

Maths-General