Farmer in a particular region were concerned that premature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield.
Options […]
Examination of blood of a person suspected of having anaemia, show large, immature, nucleated erythrocytes without haemoglobin. Supplementhing his diet with which of the following is likely to alleviate his symptoms
Options
(a) […]
The formula for exponential population growth is
Options
(a) dN/dt = rN (b) dt/dN = rN (c) dN/rN = dt (d) rN/dN = dt
Correct Answer:
dN/dt = rN
Explanation:
No explanation available. […]
The correct order regarding the electronegetivity of hybrid orbitals of carbon is
Options
(a) sp < sp² < sp³ (b) sp > sp² < sp³ (c) sp > sp² > sp³ (d) sp […]
Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. According to Bohr’s theory, the spectral lines emitted by hydrogen will […]
An electric dipole of moment p is lying along a uniform electric field E. The work done in rotating the dipole by 90° is
Options
(a) pE (b) √2 pE (c) pE / […]
A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a […]
A transistor-oscillator using a resonant circuit with an inductor L (of negligible resisitance) and a capacitor C in series produce oscillations of frequency f. If L is doubled and C is changed to 4C, the […]
The core of a transformer is laminated because
Options
(a) ratio of voltage in primary and secondary may be increased (b) energy losses due to eddy currents may be minimised (c) the weight […]
The momentum of a photon of energy 1 MeV in kg m/s will be
Options
(a) 5 x 10⁻²² (b) 0.33 x 10⁶ (c) 7 x10⁻²⁴ (d) 10⁻²²
Correct Answer:
5 x 10⁻²²
Explanation: […]
2017 Copyright Doctor Dreams Training Academy