`alpha` particle contains_____ units of positive charges.

An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.

How do histones acquire positive charge?

A non-conducting disc of radius a with uniform positive surface charge density sigma is placed on the ground with its axis vertical. A particle of mass m and positive charge q is dropped along the axis of the disc from a height H with zero initial velocity. Charge per unit mass of the particle is q/m = (4 epsilon_0 g)/(sigma) . (i) Find the value of H if the particle just reaches the disc.

A non-conducting disc of radius a with uniform positive surface charge density sigma is placed on the ground with its axis vertical. A particle of mass m and positive charge q is dropped along the axis of the disc from a height H with zero initial velocity. Charge per unit mass of the particle is q/m = (4 epsilon_0 g)/(sigma) . (ii) Find the height for its equilibrium position.

State the differences between alpha and beta - particles in respect of their charges , masses and ionisation powers .

Loss of alpha -particle is equivalent to

What is the unit of electric charge ?

In air the value of the total electric flux emitted from unit positive charge is

A conductor of capacity 4 units, charged with 100 units of positive charge is connected to another conductor of capacity 2 units, charged with 20 units of negative charge. What is the change in potential of each conductor ? What will be the charges of each of them after connection?

alpha -particle can be detected using-