# A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eye piece of focal length 2 cm ?

1 ) A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eye piece of focal length 2 cm ?

Solution : -

Distance between objective and eye piece lens : -

L = F˳ + Fe = 16 + 0.02…

# 1 ) An object is placed at a distance of f/2 from a convex lens . The image will be ?

1 ) An object is placed at a distance of f/2 from a convex lens . The image will be : -

Solution : -

# The coefficient of linear expansion of iron is 0.000011 per K . An iron rod is 10 m long at 27 C . The length of rod will decreased by 1.1 mm , when the temperature of rod changes to ?

1 ) The coefficient of linear expansion of iron is 0.000011 per K . An iron rod is 10 m long at 27 C . The length of rod will decreased by 1.1 mm , when the temperature of rod changes to : -

A ) 11 C , B…

# 1) The length of a metallic rod is 5 m at 0 C ( Celsius ) and become 5.01m on heating up to heating up to 100 C . The linear expansion of metal will be ?

1 ) The length of a metallic rod is 5 m at 0 C ( Celsius ) and become 5.01 m on heating up to heating up to 100 C . The linear expansion of metal will be : -

Solution : -

L = L˳ ( 1 + α…

# The length of tube of a microscope is 10 cm . The focal length of the objective and eye lens are 0.5 cm and 1.0 cm . The magnifying power of microscope is about ?

1 ) The length of tube of a microscope is 10 cm . The focal length of the objective and eye lens are 0.5 cm and 1.0 cm . The magnifying power of microscope is about : -

A ) 221 , B ) 500 ,

C ) 891 …

# 1 ) What is total number of radical and angular nodes present in 5f orbital ?

1 ) What is total number of radical and angular nodes present in 5f orbital ?

Solution : -

Radical and angular nodes : -

Region where electron density in an orbital is zero .

5f orbital : -

Principal quantum number is number of shells . …

# 1) At constant temperature , on increasing the pressure of a gas by 5 % , its volume will decrease by ?

1 ) At constant temperature , on increasing the pressure of a gas by 5 % , its volume will decrease by : -

Solution : -

. . . . . . . . . . . . . . . . . . . . . . …

# 1 ) Find the pressure exerted below a column of water , open to the atmosphere at the depth , a ) 5 m , b ) 20 m ?

1 ) Find the pressure exerted below a column of water , open to the atmosphere at the depth ,

a ) 5 m ,

b ) 20 m ,

( Given density of water = 1 x 10 ^ 3 kg / m3 , g = 10 m /…

# 1 ) A certain charge liberate 0.8 g of oxygen . The same charge will liberate , how many g of silver ?

1 ) A certain charge liberate 0.8 g of oxygen . The same charge will liberate , how many g of silver : -

A ) 10.8 g , B ) 19.2 g ,

C ) 41 g , D ) None of these , 