Raj Bali
Articles written in Pramana – Journal of Physics
Volume 47 Issue 1 July 1996 pp 25-31 Research Articles
Magnetized cylindrically symmetric universe in general relativity
A magnetized cylindrically symmetric universe with two degrees of freedom in which the free gravitational field is Petrov type I degenerate, is obtained. The magnetic field is due to an electric current produced along the x-axis. The distribution consists of an electrically neutral perfect fluid with an infinite electrical conductivity. The behaviour of the model when magnetic field tends to zero and other physical aspects of the model are also discussed.
Volume 56 Issue 4 April 2001 pp 513-518 Research Articles
Bianchi type IX string cosmological model in general relativity
We have investigated Bianchi type IX string cosmological models in general relativity. To get a determinate solution, we have assumed a condition
Volume 58 Issue 3 March 2002 pp 457-463 Research Articles
Tilted Bianchi type I dust fluid cosmological model in general relativity
In this paper, we have investigated a tilted Bianchi type I cosmological model filled with dust of perfect fluid in general relativity. To get a determinate solution, we have assumed a condition
Volume 59 Issue 1 July 2002 pp 1-7 Research Articles
Bianchi type I inflationary universe in general relativity
In this paper, we have investigated Bianchi type I inflationary universe in the presence of massless scalar field with a flat potential. To get an inflationary solution, we have considered a flat region in which potential
Volume 62 Issue 5 May 2004 pp 1007-1014
Conformally flat tilted Bianchi Type-V cosmological models in general relativity
We have investigated two conformally flat tilted Bianchi Type-V cosmological models in general relativity. To get a determinate solution, we have assumed a supplementary condition
Volume 63 Issue 3 September 2004 pp 481-490
Bianchi type-I bulk viscous fluid string dust magnetized cosmological model in general relativity
Bianchi Type-I magnetized bulk viscous fluid string dust cosmological model is investigated. To get a determinate model, we have assumed the conditions σ ∝
Volume 64 Issue 2 February 2005 pp 187-196
Bianchi Type-IX viscous fluid cosmological model in general relativity
Bianchi Type-IX viscous fluid cosmological model is investigated. To get a deterministic model, we have assumed the condition
Volume 72 Issue 5 May 2009 pp 787-796 Research Articles
Bianchi Type V magnetized string dust cosmological models with Petrov-type degenerate
Bianchi Type V massive string cosmological models with free gravitational field of Petrov Type degenerate in the presence of magnetic field with variable magnetic permeability are investigated. The magnetic field is due to an electric current produced along the 𝑥-axis. The $F_{23}$ is the only non-vanishing component of electromagnetic field tensor $F_{ij}$. Maxwell's equations $F_{[ij;k]} = 0$ and $F_{ij}^{ij} = 0$ are satisfied by $F_{23}$ = constant. The behaviour of the model in the presence and absence of magnetic field and other physical aspects are also discussed.
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