Explore topic-wise InterviewSolutions in Current Affairs.

a. False. They are expressed as discrete grey-scale values. It is the analogue input that is continuous. 

b. True.

c. True. 

d. False. Eight bits may be sufficient for images with high noise (e.g. radionuclide imaging), but for imaging requiring greater resolution, 12 bits or more are required. 

e. True. Greater compression can lead to loss of data (using ‘irreversible algorithms’).

a. True. 

b. True. A pixel has an assigned value, which represents the signal intensity within the corresponding part of the image. The matrix size refers to the total number of pixels. 

c. True. 

d. False. Increasing the detector sampling frequency will reduce sensitivity. This is due to a decrease in the relative proportion of the pixel that is sensitive to image detection (known as the ‘fill factor’). 

e. True. In solid-state designs of detector, the micro-circuitry may be integrated with the X-ray absorption layer. 

At T₂  the resistance higher.

a. As time passes the speed of forward reaction decreases and backward reaction increases.

b. 25th-minute 

c. Attain equilibrium fast ie. before 25th minute.

The correct answer is Neither 1 nor 2.

• Boyle's Law
  • It states that the pressure exerted by a gas is Inversely proportional to the volume occupied by it. (statement 1 is incorrect)
  • The pressure and volume of a gas are inversely proportional to each other as long as the temperature and the quantity of gas are kept constant.
  • PV = k where P is the pressure exerted by the gas, V is the volume occupied by it and k is the constant.
• Charle's Law
  • It states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure. (statement 2 is incorrect)
  • Also, When there is a decrease in temperature it will lead to a decrease in volume.
  • Charle’s law is a special case of the ideal gas law. The law is applicable to the ideal gases that are held at constant pressure but the temperature and volume keep changing.
  • V_I /T_I =V_F /T_F where V_I=Initial volume, V_F=Final volume, T_I= Initial absolute temperature, T_F=Final absolute temperature. Please note that the temperature is in kelvin.

Properties of elements are periodic functions of their atomic numbers.

The enthalpy change occurs when an electron is added to isolated gaseous atom to convert into anion.

A catalyst has no effect on the position of equilibrium but it helps the reaction to attain equilibrium quickly.

When an asymmetric reagent adds up to an unsymmetrical alkene, the negative part of the adding molecule goes to the carbon atom with lesser number of hydrogen atoms while the positive part to the other carbon atom.

3d orbital is specified by l = 2 and n = 3.

Electrolysis of brine solution.

A catalyst has no effect on the position of equilibrium but it helps the reaction to attain equilibrium quickly.

3, 4- dimethyl hexane.

Atom or group of atom which determine the characteristic properties of organic compound.

Significant figures in 6.022 × 10²³ :

4 or Four.

Lithium or Li.

Both forward and backward reactions are occurring at the same rate.

The concentration of the reactants and products remains constant.

The resonance effect is defined as the polarity produced in the molecule by the interaction of two π bonds or between a π -bond and lone pair of electrons present in conjugated molecular.

+R_effect: -NH₂, – NHCOCH₃, – CH₃

-R_effect: -NO₂, -CN, -CHO, -COOH

1. An electron in an atom could revolve around the nucleus only in certain stable orbits without the emission of radiant energy. 

2. An electron revolves around the nucleus only in those orbits for which the angular momentum is an integral multiple of (h/2π), where h is the Planck’s constant. 

3. An electron can jump from higher energy orbit to lower energy orbit. In this process a photon is emitted whose energy is equal to the energy difference between the initial and final states.

Bohr’s Model of an atom, the postulates are 

1. Electrons revolve around the nucleus of an atom in a certain definite path called Orbit or stationary state of shell. 

2. The shells are having different energy levels denoted as K, L, M, N, …… 

3. As long as the electron remains in an orbit, they neither absorb nor emit energy. 

4. The electron can move only in that orbit in which angular momentum is quantized, i.e., the angular momentum of the electron is an integral multiple of h/2π.

The angle of dip is given by δ=tan⁻¹(B_v/B_h) 

where B_{v ​} = vertical component of earth's magnetic field and B_h ​ = horizontal components of earth's magnetic field. 

Here, B_v ​ =B_h ​ 

So, δ=tan⁻¹ (1)=45^o

Correct option is (4) An atomic orbital is the wave function \(\Psi\) for an electron in an atom.

An orbital is represented by only n, l, m

Bohr model fails for explanation of the details of hydrogen atom spectrum.

At equator, dip is zero.

The magnetic susceptibility of a para magnetic substance varies inversely to its absolute temperature(T). 

i.e x α\(\frac{C}{T}\) (x = \(\frac{C}{T}\))

The magnetic susceptibility (X) of a para magnetic substance is inversely proportional to the absolute temperature (T). 

X = \(C\frac{\mu_0}{T}\)

C – Curie constant.

1. used in LASIK eye surgery 

2. UV lamps are used to kill germs in water purifiers 

3. Disinfection for virus and bacteria 

4. To produce photo electric current in burglar alarm.

The phenomenon of confining the vibrations of light in a single plane is called polarisation. Reflection/scattering.

 a water molecule in flowing stream can be located using a vector A = yzi - yj + xz²k find the divergence of the molecule

1. Ferromagnetic substance is strongly attracted by a magnet.

2. The relative permeability of a ferromagnetic substance is very large i.e. Mr >> 1. 

3. The magnetic susceptibility of a ferromagnetic substance is high +ve value.