- A1.6 × 10–19 C
- B3.2 × 10–19 C
- C1.6 × 10–20 C
- D4.8 × 10–19 C
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In a fission reaction
, the binding energy per nucleon of X and Y is 8.5 MeV whereas of
is 7.6 MeV. The total energy liberated will be about
|
(a) 200 KeV |
(b) 2 MeV |
(c) 200 MeV |
(d) 2000 MeV |
An electron is moving with a speed of
perpendicular to a uniform magnetic field of intensity B. Suddenly intensity of the magnetic field is reduced to B/2. The radius of the path becomes from the original value of r
|
(a) No change |
(b) Reduces to r / 2 |
(c) Increases to 2r |
(d) Stops moving |
Two sources of waves are called coherent if
|
(a) Both have the same amplitude of vibrations |
|
(b) Both produce waves of the same wavelength |
|
(c) Both produce waves of the same wavelength having constant phase difference |
|
(d) Both produce waves having the same velocity |
A wire of length 5 m and radius 1 mm has a resistance of 1 ohm. What length of the wire of the same material at the same temperature and of radius 2 mm will also have a resistance of 1 ohm
|
(a) 1.25 m |
(b) 2.5 m |
(c) 10 m |
(d) 20 m |