AIEEE 2005 Physics Question Paper Mock Test

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity then:

A charged particle of mass $m$ and charge $q$ travels on a circular path of radius $r$ that is perpendicular to a magnetic field $B$. The time taken by the particle to complete one revolution is:

In a potentiometer experiment the balancing with a cell is at length $240\text{ cm}$. On shunting the cell with a resistance of $2\Omega$ the balancing length becomes $120\text{ cm}$. The internal resistance of the cell is:

The resistance of hot tungsten filament is about $10$ times the cold resistance. What will be the resistance of $100\text{ W}$ and $200\text{ V}$ lamp when not in use?

A magnetic needle is kept in a non-uniform magnetic field. It experiences: