Initial speed of an `alpha` particle inside a tube of length 4m is `1 kms^(-1)`, if it is accelerated in the tube and comes out with a speed of `9 kms^(-1)` , then the time for which the particle remains inside the tube is

An alpha particle enters a hollow tube of 4m length with an initial speed of 1km//s . It is accelerated in the tube and comes out of it with a speed of 9 km//s . The time for which it remains inside the tube is

In an X ray tube , the accelerating voltage for the electrons is increased from 15000 V to 30000 V. then the speed of the emitted X rays inside the tube will be

A particle is projected at an angle 60^@ with horizontal with a speed v = 20 m//s . Taking g = 10m//s^2 . Find the time after which the speed of the particle remains half of its initial speed.

A particle is projected at an angle 60^@ with horizontal with a speed v = 20 m//s . Taking g = 10m//s^2 . Find the time after which the speed of the particle remains half of its initial speed.

A wire of length 100 m is tightly wounded on a hollow tube of radius 5 mm and length 1m . A current of 1 A is flowing in the wire. Then magnetic field strength inside the tube will be : -

A wire of length 100 m is tightly wounded on a hollow tube of radius 5mm and length 1 m. A current of 1 A is flowing in the wire. Then magnetic field strength inside the tube will be :-

A wire of length 100 m is tightly wounded on a hollow tube of radius 5mm and length 1 m. A current of 1 A is flowing in the wire. Then magnetic field strength inside the tube will be :-

The cylindrical tube of a spray pump has a cross-section of 8 cm^(2) , one end of which has 40 fine holes each of area 10^(-8) m^(2) .If the liquid flows inside the tube with a speed of 0.15 m m^(-1) , the speed with which the liquid is ejected through the holes is

A current I ampere flows along an infinitey1 along straight thin walled tube, then the magnetic induction at any point inside the tube is .

A particle of mass 0.1kg is launched at an angle of 53^(@) with the horizontal . The particle enters a fixed rough hollow tube whose length is slightly less than 12.5m and which is inclined at an angle of 37^(@) with the horizontal as shown in figure. It is known that the velocity of ball when it enters the tube is parallel to the axis of the tube. The coefficient of friction betweent the particle and tube inside the tube is mu=(3)/(8)[ Take g=10m//g^(2)] The kinetic energy of the particle when it comes out of the tube is approximately equal to :