For ferromagnetic material, the relative permeability (, versus magnetic intensity (H) has the following shape
|
(a) |
(b) |
(c) |
(d) |
For ferromagnetic material, the relative permeability (, versus magnetic intensity (H) has the following shape
|
(a) |
(b) |
(c) |
(d) |
(d)
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An electron (mass = 9 × 10–31kg. Charge = 1.6 × 10–19C) whose kinetic energy is 7.2 × 10–18 joule is moving in a circular orbit in a magnetic field of 9 × 10–5 weber/m2. The radius of the orbit is
|
(a) 1.25 cm |
(b) 2.5 cm |
(c) 12.5 cm |
(d) 25.0 cm |

If
is 6563 Å, then wave length of second line for Balmer series will be
|
(a) |
(b) |
(c) |
(d) None of the above |
The capacity of a parallel plate condenser is 10 μF, when the distance between its plates is 8 cm. If the distance between the plates is reduced to 4 cm, then the capacity of this parallel plate condenser will be
|
(a) 5 μF |
(b) 10 μF |
(c) 20 μF |
(d) 40 μF |
Two resistances and
when connected in series and parallel with 120 V line, power consumed will be 25 W and 100 W respectively. Then the ratio of power consumed by
to that consumed by
will be
|
(a) 1 : 1 |
(b) 1 : 2 |
(c) 2 : 1 |
(d) 1 : 4 |