Physics-
General
Easy
Question
A composite bar of length 
is made up from a rod of material 1 and of length L1 attached to a rod of material 2 and of length L2 as shown. If 
and 
are their respective coefficients of linear expansion, then equivalent coefficient of linear expansion for the composite rod is:
The correct answer is:
Related Questions to study
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The observer 'O' se the distance AB as infinitely large. If refractive index of liquid is and that of glass 
is:
The observer 'O' se the distance AB as infinitely large. If refractive index of liquid is and that of glass is:
physics-General
physics-
Figure shows two conducting thin concentric shells of radii r and 3r. The outer shell carri charge q and inner shell is neutral. The amount of charge which flows from inner shell to the earth after the key K is closed, is equal to:
Figure shows two conducting thin concentric shells of radii r and 3r. The outer shell carri charge q and inner shell is neutral. The amount of charge which flows from inner shell to the earth after the key K is closed, is equal to:
physics-General
physics-
Two conducting large plat 
& 
are placed parallel to each other at very small separation 'd'. The plate area of either face of plate is A. A charge +2Q is given to plate & –Q to the plate (neglect ends effects). If plate & are now connected by conducting wire, then total amount of heat produced is
Two conducting large plat & are placed parallel to each other at very small separation 'd'. The plate area of either face of plate is A. A charge +2Q is given to plate & –Q to the plate (neglect ends effects). If plate & are now connected by conducting wire, then total amount of heat produced is
physics-General
physics-
An object is placed infront of a converging lens at a distance equal to twice the focal length 
of the lens. On the other side of the lens is a concave mirror of focal length 
separated from the lens by a distance 
. Light from the object pass rightward through the lens, reflects from the mirror, pass leftward through the lens and forms a final image of the object.
An object is placed infront of a converging lens at a distance equal to twice the focal length of the lens. On the other side of the lens is a concave mirror of focal length separated from the lens by a distance . Light from the object pass rightward through the lens, reflects from the mirror, pass leftward through the lens and forms a final image of the object.
physics-General
physics-
Two particle of charge q1 and q2 are separated by distance d as shown in figure. Charge q1 is situated at the origin. The net electric field due to the particle is zero at x = d/4. With V = 0 at infinity, the location of a point in terms of d on the x axis (other than at infinity) at which the electrical potential due to the two particle is zero, is given by:
Two particle of charge q1 and q2 are separated by distance d as shown in figure. Charge q1 is situated at the origin. The net electric field due to the particle is zero at x = d/4. With V = 0 at infinity, the location of a point in terms of d on the x axis (other than at infinity) at which the electrical potential due to the two particle is zero, is given by:
physics-General
physics-
1mC. charge is uniformly distributed on a spherical shell given by equation 
What will be intensity of electric field at a point (1, 1, 2)?
1mC. charge is uniformly distributed on a spherical shell given by equation What will be intensity of electric field at a point (1, 1, 2)?
physics-General
physics-
An electron is placed just in the middle between two long fixed line charge of charge density + The wire are in the xy plane (Do not consider gravity)
An electron is placed just in the middle between two long fixed line charge of charge density + The wire are in the xy plane (Do not consider gravity)
physics-General
physics-
Consider a gaussian spherical surface, covering a dipole of charge q and –q, then 
Consider a gaussian spherical surface, covering a dipole of charge q and –q, then
physics-General
physics-
acitor 
in the circuit is a variable acitor (its acitance can be varied). Graph is plotted between potential difference 
(across acitor 
) versus . Electric potential approaches on asymtote of 10 V as 
The acitance of 
is equal to:
acitor in the circuit is a variable acitor (its acitance can be varied). Graph is plotted between potential difference (across acitor ) versus . Electric potential approaches on asymtote of 10 V as
The acitance of is equal to:
physics-General
physics-
acitor in the circuit is a variable acitor (its acitance can be varied). Graph is plotted between potential difference (across acitor ) versus Electric potential V1 approaches on . asymtote of 10 V as 
The acitance of the acitor C1 has value:
acitor in the circuit is a variable acitor (its acitance can be varied). Graph is plotted between potential difference (across acitor ) versus Electric potential V1 approaches on . asymtote of 10 V as
The acitance of the acitor C1 has value:
physics-General
physics-
Capacitor in the circuit is a variable capacitor (its capacitance can be varied). Graph is plotted between potential difference (across capacitor ) versus Electric potential approaches on asymtote of 10 V as
The electric potential V across the battery is equal to:
Capacitor in the circuit is a variable capacitor (its capacitance can be varied). Graph is plotted between potential difference (across capacitor ) versus Electric potential approaches on asymtote of 10 V as
The electric potential V across the battery is equal to:
physics-General
physics-
the figure shown 
In the surface charge density on the upper metallic plate
the figure shown In the surface charge density on the upper metallic plate
physics-General
physics-
The magnetic flux density in vaccum at the centre of any square coil (of one turn) of side 'a' and carrying a current I is kI/a where k is independent. The magnitude of the induction at X, Y, Z are 
, 
and 
respectively. Then
The magnetic flux density in vaccum at the centre of any square coil (of one turn) of side 'a' and carrying a current I is kI/a where k is independent. The magnitude of the induction at X, Y, Z are , and respectively. Then
physics-General
physics-
Two blocks (from very far apart) are approaching towards each other with velocities as shown in figure. The coefficient of friction for both the blocks is 
= 0.2
How much distance will centre of mass travel before coming permanently to rest
Two blocks (from very far apart) are approaching towards each other with velocities as shown in figure. The coefficient of friction for both the blocks is = 0.2
How much distance will centre of mass travel before coming permanently to rest
physics-General
physics-
Two blocks (from very far apart) are approaching towards each other with velocities as shown in figure. The coefficient of friction for both the blocks is m = 0.2
Linear momentum of the system is
Two blocks (from very far apart) are approaching towards each other with velocities as shown in figure. The coefficient of friction for both the blocks is m = 0.2
Linear momentum of the system is
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