List of practice Questions

A star is moving away from the Earth with speed $V$. Change in wavelength $(d\lambda)$ observed on Earth is

$_6C^{14}$ and $7_N^{15}$ are examples of

If the Earth shrinks in its size (radius) mass remaining the same, the value of g on its surface will

Distance between two point charges is increased by 20%. Force of interaction between the charges

A $CE$ amplifier has current gain 50. Load resistance is $4 \, k\Omega$ and input resistance is $500 \, \Omega . 10 \, m V \, AC$ signal is applied. Peak value of output signal is

A calcite crystal is placed over a dot on a paper sheet and the crystal is rotated. On viewing through the calcite one sees

90 dB sound is x times more intense than 40 dB sound, then x is

The square of the resultant of two equal forces acting at a point is equal to three times their product. Angle between them is

Two rods of same area of cross section and lengths, and conductivities $K_1$ and $K_2$ are connected in series. Then, in steady state conductivity of the combination is

A stone dropped from the top of a tower reaches ground in 4 s. Height of the tower is $(g = 10 \, m/s^2)$

In a resonance pipe the first and second resonances are obtained at depths $ 22.7 \,cm $ and $ 70.2\, cm $ respectively. What will be the end correction ?

Adipic acid is used in the preparation of

Photochemical phase of photosynthesis occurs in

Which is not part of glomerular ultrafiltrate ?

Diploid structure found in embryo sac is

A particle performing $ SHM $ has time period $ \frac{2\pi}{\sqrt3} $ and path length $ 4\, cm $ . The displacement from mean position at which acceleration is equal to velocity is

A point on $XOZ$ plane divides the join of $(5,-3,-2)$ and $ (1,2,-2)$ on

$ 0.1\, M $ solution of which of the following has almost unity degree of dissociation ?

The maximum value of $ z = 9x + 13y $ subject to $ 2x + 3y \le 18, 2x + y \le 10, x \ge 0, y \ge 0 $ is

If the electron in a hydrogen atom jumps from an orbit with level $n_{1} =2$ to an orbit with level $n_{2} =1$ the emitted radiation has a wavelength given by

Ethyl butyrate has the flavour of which fruit ?

If an electron is revolving around the hydrogen nucleus at a distance of $ 0.1 \,nm $ , what should be its speed ?

$ \lim\limits _{x\to 1 } \left(log \,ex\right)^{1/log\,x} $ is equal

Joint equation of pair of lines through $ (3, - 2) $ and parallel to $ x^2 - 4xy + 3y^2 = 0 $ is

Find the function $ f(x_1, x_2, x_3) $ satisfying $ f(x_1, x_2, x_3) = 1 $ at $ x_1 = 1, x_2 = x_3 = 0 $ .