List of top Questions asked in DUET

An iron block of mass $5\, kg$ is kept on a trolley. If the trolley is being pushed with an acceleration of $5\,m / s $$ 2$, what will be the force of friction between the block and the trolley surface? (Take the coefficient of static friction between the block and the trolley surface to be $0,8$).
A person is measuring his weight by standing on a weighing machine inside a lift. When the lift is at rest, the machine shows his weight to be $55 \,kg$. In between the floor when the lift is moving up with a constant speed of $10\, km/h$, he again measures his weight, which is
Which one of the following layer of the anther wall helps in its dehiscence ?
Who is considered as the father of Ecology in India?
Which of the following combinations is correct for wheat?
When a lens of refractive index $ n_{1} $ is placed in a liquid of refractive index $ n_{2}$ the lens looks to be disappeared only if
The predominant antibody in saliva is
The long and short arms of chromosome are designated respectively as
The density of a nucleus of mass number $A$ is proportional to
Solute potential of a solution is always
Lactobacillus mediated conversion of milk to curd results because of
IUCN stands for
Hotspots of biodiversity means
The beginning of understanding genetic transformation in bacteria was made by
The critical angle for total internal reflection in diamond is $ 24.5^{\circ} $ . The refractive index of the diamond is
Somaclonal variation appears in plants
Which of the following is true?
In a monoecious plant
For a first order reaction, the time required for $99.9\%$ of the reaction to take place is nearly
One of the following is not a property of field lines
The least porous soil among the following is a
A long straight wire of a circular cross-section (radius $ a $ ) carries a steady current $ I $ and the current $ I $ is uniformly distributed across this cross-section. Which of the following plots represents the variation of magnitude of magnetic field $B$ with distance $r$ from the centre of the wire?
External fertilization occurs in majority of
The surface charge density (in $ Cm^{-2} $ ) of the earth is about
Gausss law is valid for