- A0°
- B45°
- C90°
- D180°
Explanation:
$\text{i}=\text{i}_\text{o}\sin(\omega\text{t}+\frac{\pi}{2})$
current leads voltage by $\frac{\pi}{2}$ i.e., current and voltage differ in phase by 90°
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An infinite sequence of resistance is shown in the figure. The resultant resistance between A and B will be, when and
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(a) Infinity |
(b) 1 Ω |
(c) 2 Ω |
(d) 1.5 Ω |
The binding energy per nucleon of
is 7.97 MeV and that of
is 7.75 MeV. The energy (in MeV) required to remove a neutron from
is
|
(a) 3.52 |
(b) 3.64 |
(c) 4.23 |
(d) 7.86 |
A magnet of magnetic moment M is rotated through 360° in a magnetic field H, the work done will be
| (a) MH | (b) 2MH | (c) 2πMH | (d) Zero |
If the energy of a hydrogen atom in nth orbit is
, then energy in the nth orbit of a singley ionized helium atom will be
|
(a) 4 |
(b) |
(c) 2 |
(d) |