Complete the equation for the following fission process ![]()
|
(a) |
(b) |
(c) |
(d) |
Complete the equation for the following fission process ![]()
|
(a) |
(b) |
(c) |
(d) |
(a)
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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
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(a) 1.25 m |
(b) 2.5 m |
(c) 10 m |
(d) 20 m |
In any fission process the ratio
is
|
(a) Less than 1 |
|
(b) Greater than 1 |
|
(c) Equal to 1 |
|
(d) Depends on the mass of the parent nucleus |
For a transistor, in a common emitter arrangement, the alternating current gain b is given by
|
(a) β = |
(b) β = |
(c) β = |
(d) β = |
A charge moves in a circle perpendicular to a magnetic field. The time period of revolution is independent of
|
(a) Magnetic field |
(b) Charge |
|
(c) Mass of the particle |
(d) Velocity of the particle |
The resistivity of a wire depends on its
|
(a) Length |
(b) Area of cross-section |
(c) Shape |
(d) Material |
Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is

|
(a) |
(b) |
(c) |
(d) |
Interference was observed in interference chamber when air was present, now the chamber is evacuated and if the same light is used, a careful observer will see
|
(a) No interference |
|
(b) Interference with bright bands |
|
(c) Interference with dark bands |
|
(d) Interference in which width of the fringe will be slightly increased |
In the graph given below. If the slope is 4.12
V-sec, then value of ‘h’ should be

|
(a) 6.6 |
(b) 6.6 |
(c) 9.1 |
(d) None of these |
Monochromatic light is refracted from air into the glass of refractive index μ. The ratio of the wavelength of incident and refracted waves is
|
(a) 1 : μ |
(b) 1 : |
(c) μ : 1 |
(d) 1 : 1 |
Atomic mass number of an element thorium is 232 and its atomic number is 90. The end product of this radioactive element is an isotope of lead (atomic mass 208 and atomic number 82). The number of alpha and beta particles emitted is
|
(a) α = 3, β = 3 |
(b) α = 6, β = 4 |
(c) α = 6, β = 0 |
(d) α = 4, β = 6 |