The photo electric current at distances `r_1 and r_2` of light source from photoelectric cell are `I_1 and I_2` respectively. Find the value of `I_1//I_2`.

The magnitude of gratitational field intensities at distance r_(1) and r_(2) from the centre of a uniform solid sphere of radius R and mass M are I_(1) and I_(2) respectively. Find the ratio of I_(1)//I_(2) if (a) r_(1) gt R and r_(2) gt R and (b) r_(1) lt R and r_(2) lt R (c ) r_(1) gt R and r_(2) lt R .

The magnitude of gravitational field at distances r_(1) and r_(2) from the centre of a uniform sphere of radius R and mass M , respectively. Find the ratio of (I_(1))//(I_(2))) if r_(1)gtR and r_(2)gtR .

The magnitude of gravitational field at distances r_(1) and r_(2) from the centre of a uniform sphere of radius R and mass M , respectively. Find the ratio of (I_(1))//(I_(2))) if r_(1)gtR and r_(2)gtR .

Two sources of light whose ratio of intensities are I_1/I_2 = 2x . Find the value of (I_max -I_min)/(I_max+I_min)

A battery of e.m.f E and internal resistance r sends a current I_1 and I_2 , when connected to an external resitance of R_1 and R_2 respectively. Find the e.m.f and internal resistance o the battery.