List of top Physics Questions on Current Density asked in CUET (UG)

An electron beam has an aperture \(2\,\text{mm}^2\). A total of \(6.0\times10^{15}\) electrons pass through any perpendicular cross-sectional area per second. The current density of the beam is
The drift velocity of electrons in a conductor increases when:
An infinite line charge produces an electric field of 9 × 106 N/C at a distance of 20 cm. The linear charge density will be :
A spherical conducting shell of inner radius r₁ and outer radius r₂ has a charge Q. A charge q is placed at the centre of the shell. The surface charge density on outer surface of the shell is:
Match List I with List II
LIST I LIST II
A.ConductanceI.[ML3 T-3A-2]
B.Current densityII.[M-1L-3 T3 A2]
C.Specific resistanceIII.[M0L-2 T0A¹]
D.Electrical conductivitiesIV.[M-1L-2 T3 A2]
Choose the correct answer from the options given below: