Identify the paramagnetic substance
|
(a) Iron |
(b) Aluminium |
(c) Nickel |
(d) Hydrogen |
Identify the paramagnetic substance
|
(a) Iron |
(b) Aluminium |
(c) Nickel |
(d) Hydrogen |
(b) Aluminium
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A bar magnet of length 3 cm has points A and B along its axis at distances of 24 cm and 48 cm on the opposite sides. Ratio of magnetic fields at these points will be
|
(a) 8 |
(b) 1/2 |
(c) 3 |
(d) 4 |
Three resistors each of 4Ω are connected together to form a network. The equivalent resistance of the network cannot be
|
(a) 1.33 Ω |
(b) 3.0 Ω |
(c) 6.0 Ω |
(d) 12.0 Ω |
One metallic sphere A is given positive charge whereas another identical metallic sphere B of exactly same mass as of A is given equal amount of negative charge. Then
|
(a) Mass of A and mass of B still remain equal |
|
(b) Mass of A increases |
|
(c) Mass of B decreases |
|
(d) Mass of B increases |
In hydrogen atom, when electron jumps from second to first orbit, then energy emitted is
|
(a) – 13.6 eV |
(b) – 27.2 eV |
(c) – 6.8 eV |
(d) None of these |