The phase difference between electric field E and magnetic field B in an electromagnetic wave propa…
Figure shows the variation of inductive reactance XL of two ideal inductors of inductance L1 and L2…
A circular loop A of radius R carries a current I. Another circular loop B of radius r is placed co…
A galvanometer of resistance 100 is converted into an ammeter of range (0 – 1 A) using a resistance…
The magnetic susceptibility for a diamagnetic material is (A) small and negative (B) small and posi…
A straight wire is kept horizontally along east west direction. If a steady current flows in wire f…
The radius (rn) of nth orbit in Bohr model of hydrogen atom varies with n as Ans. The radius of the…
The quantum nature of light explains the observations on the photoelectric effect as – (A) there is…
Two identical small conducting balls B, and B, are given -7 pC and + 4 pC charges respectively. The…
Two charges + q each are kept ‘2a’ distance apart. A third charge – 2q is placed midway between the…
Describe any two sources of water pollution in India, Suggest any three measures to overcome the wa…
Describe any two sources of air pollution in Indin and suggest any three measures to overcome the a…
