Find the kinetic energy of the photoelectrons emitted when light of wavelength 4000 Å is incident on a metal of work function 2 eV (find approximately)
A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
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A transformer is having 2100 turns in primary and 4200 turns in secondary. An a.c. source of 120 V, 10 A is connected to its primary. The secondary voltage and current are :
A charge q is placed at the corner of a cube of side l. The electric flux passing through the cube is
As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order:
On adding a few drops of dilute HCl to a freshly precipitated ferric hydroxide, a red-coloured colloidal solution is obtained. This phenomenon is called
The combining ratios of hydrogen and oxygen in water and hydrogen peroxide are 1: 8 and 1 : 16. Which law is illustrated in this example?
The solution of the equation cosx cosy (dy/dx)=-sinx siny is
The differential equation of family of lines which passes (1,-1) is
The area in square units of the region bounded by the curves x2 = 4y, the line x = 2 and the x-axis is
In Δ A B C , If a2 + b2 + c2 = 8 R2 , then the triangle is
In a Δ A B C , 2s = perimeter and R = circumradius. Then s/R is equal to
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