List of top Questions asked in DUET- 2011

In a reverse-biased $p-n$ function, When the applied bias voltage is equal to the breakdown voltage, then

How many bio-geographical regions are present in India?

The longitudinal wave can be observed in

Which of the following principles is being used in Sonar Technology?

The reduced mass of two particles having masses $m$ and $2\, m$ is

In optical fibres, the refractive index of the core is

When an $AC$ voltage is applied to a $L-C-R$ circuit, which of following is true ?

A body of mass $M$ starts sliding down on the inclined plane where the critical angle is $\angle ACB = 30^{\circ}$ as shown in figure. The coefficient of kinetic friction will be

The mean free path of collision of gas molecules varies with its diameter $(d)$ of the molecules as

Darwin judged the fitness of an individual by

Decreasing order of reactivity of hydrogen halide acids in the conversion of $ ROH\to RX $ is

In the conversion of