Over what distance in free space will the intensity of a `5 eV` neutron beam reduced by a factor one - half ?
`[T_(1//2) = 12.8 " min"]`

Distance in free space at which intensity of 5 eV neutron beam reduces to half will be nearly : (Take half - life of the neutron = 12.8 min)

Distance in free space at which intensity of 5 eV neutron beam reduces to half will be nearly : (Take half - life of the neutron = 12.8 min)

A parallel plate capacitor with air between the plates has a capacitor of 8pF ("1pF="10^(-12)F) . What will be the capacitance if the distance if the distance between the plates is reduced by, half and the space between them is filled with a substance of dielectric constant 5?

Intensity of sunlight is observed as 0.092 Wm^2 at a point in free space. What will be the peak value of magnetic field at that point ? (epsilon_0=8.85 xx10^(-12) C^2 N^(-1)m^(-2))

If was found that the winding radius of a tape on a cassette was reduced by half in a time t_(1) = 20 min of operation. In what time t_(2) will the winding radius be reduced by half again ?

A source emits electromagnetic waves of wavelength 3 m . One beam reaches the observer directly and other after reflection from a watersurface, travelling 1.5 m extra distance and with intensity reduced to 1//4 as compared to intensity due to the direct beam alone. The resultant intensity will be :

A parallel plate capacitor with air between the plates has a capacitance of 8µF. What will be the capacitance if the distance between the plates is reduced by half and the space between is filled with a medium of dielectric constant 5?

A parallel plate capacitor with air between the plates has a capacitance of 8 pF.What will be the capacitance if the distance between the plates is reduced by half and the space between them is filled with a substance of dielectric constant 5?

A parallel plate capacitor with air between the plates has a capacitance of 8 pF.What will be the capacitance if the distance between the plates is reduced by half, and the space between them is filled with a substance of dielectric constants 6 ?