Physics-
General
Easy

Question

Consider radioactive decay of A to B which , further decays either to X or Y, andlambda subscript 1 end subscript lambda subscript 2 end subscript lambda subscript 3 end subscript are decay constants for A to B decay, B to X decay and B to Y decay respectively At t =0, the number of nuclei of A,B,X and Y are N subscript 0 end subscript , N subscript 0 end subscript zero and zero respectively N subscript 1 end subscript comma N subscript 2 end subscript comma N subscript 3 end subscript text  and  end text N subscript 4 end subscript are the number of nuclei of A,B,X and Y are at any instant t.

The net rate of accumulation of B at any instant is

  1. N subscript 1 end subscript lambda subscript 1 end subscript plus N subscript 2 end subscript lambda subscript 2 end subscript plus N subscript 3 end subscript lambda subscript 3 end subscript    
  2. N subscript 1 end subscript lambda subscript 1 end subscript minus N subscript 3 end subscript lambda subscript 2 end subscript minus N subscript 4 end subscript lambda subscript 3 end subscript    
  3. N subscript 1 end subscript lambda subscript 1 end subscript minus N subscript 2 end subscript lambda subscript 2 end subscript minus N subscript 2 end subscript lambda subscript 3 end subscript    
  4. N subscript 1 end subscript lambda subscript 1 end subscript plus N subscript 2 end subscript lambda subscript 2 end subscript minus N subscript 2 end subscript lambda subscript 3 end subscript    

The correct answer is: N subscript 1 end subscript lambda subscript 1 end subscript minus N subscript 2 end subscript lambda subscript 2 end subscript minus N subscript 2 end subscript lambda subscript 3 end subscript

Related Questions to study

General
physics-

The mass of nucleus blank subscript Z end subscript X to the power of A end exponent is less than the sum of the mases of (A - Z) number of neutrons and Z number of protons in the nucleus The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus A heavy nucleus of mass M can break into two light nuclei of mass m1 and m2 M only if open parentheses m subscript 1 end subscript plus m subscript 2 end subscript close parentheses less than M Also two light nuclei of mass m3 and m4 can undergo complete fusion and form a heavy nucleus of mass M “only if open parentheses m subscript 3 end subscript plus m subscript 4 end subscript close parentheses greater than M to the power of ´ ´ end exponent The masses of some netural atoms are given in the table below.

The kinetic energy (in keV) of the alpha particle, when the nucleus at rest undergo alpha decay, is

The mass of nucleus blank subscript Z end subscript X to the power of A end exponent is less than the sum of the mases of (A - Z) number of neutrons and Z number of protons in the nucleus The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus A heavy nucleus of mass M can break into two light nuclei of mass m1 and m2 M only if open parentheses m subscript 1 end subscript plus m subscript 2 end subscript close parentheses less than M Also two light nuclei of mass m3 and m4 can undergo complete fusion and form a heavy nucleus of mass M “only if open parentheses m subscript 3 end subscript plus m subscript 4 end subscript close parentheses greater than M to the power of ´ ´ end exponent The masses of some netural atoms are given in the table below.

The kinetic energy (in keV) of the alpha particle, when the nucleus at rest undergo alpha decay, is

physics-General
General
physics-

The mass of nucleus blank subscript Z end subscript X to the power of A end exponent is less than the sum of the mases of (A - Z) number of neutrons and Z number of protons in the nucleus The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus A heavy nucleus of mass M can break into two light nuclei of mass m1 and m2 M only if open parentheses m subscript 1 end subscript plus m subscript 2 end subscript close parentheses less than M Also two light nuclei of mass  m3 and m4 can undergo complete fusion and form a heavy nucleus of mass M “only if open parentheses m subscript 3 end subscript plus m subscript 4 end subscript close parentheses greater than M to the power of ´ ´ end exponent The masses of some netrural atoms are given in the table below.

The correct statement is

The mass of nucleus blank subscript Z end subscript X to the power of A end exponent is less than the sum of the mases of (A - Z) number of neutrons and Z number of protons in the nucleus The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus A heavy nucleus of mass M can break into two light nuclei of mass m1 and m2 M only if open parentheses m subscript 1 end subscript plus m subscript 2 end subscript close parentheses less than M Also two light nuclei of mass  m3 and m4 can undergo complete fusion and form a heavy nucleus of mass M “only if open parentheses m subscript 3 end subscript plus m subscript 4 end subscript close parentheses greater than M to the power of ´ ´ end exponent The masses of some netrural atoms are given in the table below.

The correct statement is

physics-General
General
physics-

From the figure describing photoelectric effect we may infer correctly that

From the figure describing photoelectric effect we may infer correctly that

physics-General
parallel
General
physics-

Figure represents a graph of kinetic energy of most energetic photoelectrons, Kmax (in eV), and frequency (v) for a metal used as cathode in photoelectric experiment. The threshold frequency of light for the photoelectric emission from the metal is

Figure represents a graph of kinetic energy of most energetic photoelectrons, Kmax (in eV), and frequency (v) for a metal used as cathode in photoelectric experiment. The threshold frequency of light for the photoelectric emission from the metal is

physics-General
General
chemistry-

OxidationstateofFeincompound(F)is:

OxidationstateofFeincompound(F)is:

chemistry-General
General
chemistry-

Compound(A)is:

Compound(A)is:

chemistry-General
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General
chemistry-

An aqueous solution of an inorganic compound (X)givesthe followingreactions:
i) Withan aqueous solutionof B a C l subscript 2 end subscript,aprecipitateinsolubleindiluteHClisobtained

ii) Addition of excess of KI gives a brown precipitate which turns white on addition of excess hypo solution

iii) With an aqueous solution of potassium ferrocyanide a chocolate colored ppt is obtained.

Identify X-
 

An aqueous solution of an inorganic compound (X)givesthe followingreactions:
i) Withan aqueous solutionof B a C l subscript 2 end subscript,aprecipitateinsolubleindiluteHClisobtained

ii) Addition of excess of KI gives a brown precipitate which turns white on addition of excess hypo solution

iii) With an aqueous solution of potassium ferrocyanide a chocolate colored ppt is obtained.

Identify X-
 

chemistry-General
General
chemistry-

Findout (F) :

Findout (F) :

chemistry-General
General
chemistry-

 Findout(E):

 Findout(E):

chemistry-General
parallel
General
chemistry-

 Find the anion(s):

 Find the anion(s):

chemistry-General
General
physics-

In a photoelectric experiment the relation between applied potential difference between cathode and anode V and the photoelectric current I was found to be shown in graph below. If Planck’s constant h equals 6.6 cross times 10 to the power of negative 34 end exponent J s, the frequency of incident radiation would be nearly left parenthesis i n blank s to the power of negative 1 end exponent right parenthesis

In a photoelectric experiment the relation between applied potential difference between cathode and anode V and the photoelectric current I was found to be shown in graph below. If Planck’s constant h equals 6.6 cross times 10 to the power of negative 34 end exponent J s, the frequency of incident radiation would be nearly left parenthesis i n blank s to the power of negative 1 end exponent right parenthesis

physics-General
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physics-

A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers Each transformer has two coils of wire electrically insulated from each other but wound around a common core of ferromagnetic material The two wires are close together but do not touch each other.

The primary coil is connected to a source of alternating (AC) current The secondary coil is connected to a resistor such as a light bulb The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material This in turn induces an oscillating voltage and AC current in the secondary coil Student collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers
The primary coil of a transformer has 100 turns and is connected to a 120V AC source How many turns are in the secondary coil if there is a 2400 V across it

A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers Each transformer has two coils of wire electrically insulated from each other but wound around a common core of ferromagnetic material The two wires are close together but do not touch each other.

The primary coil is connected to a source of alternating (AC) current The secondary coil is connected to a resistor such as a light bulb The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material This in turn induces an oscillating voltage and AC current in the secondary coil Student collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers
The primary coil of a transformer has 100 turns and is connected to a 120V AC source How many turns are in the secondary coil if there is a 2400 V across it

physics-General
parallel
General
physics-

At resonance, VL and VC are both very much greater than the applied potential, V itself The quality factor for an LCR circuit in resonance is given by Q equals fraction numerator X subscript L end subscript over denominator R end fraction In practiceQ equals 200 has been achieved

At resonance, the capacitor has been adjusted for

At resonance, VL and VC are both very much greater than the applied potential, V itself The quality factor for an LCR circuit in resonance is given by Q equals fraction numerator X subscript L end subscript over denominator R end fraction In practiceQ equals 200 has been achieved

At resonance, the capacitor has been adjusted for

physics-General
General
physics-

In the circuit diagram shown, X subscript C end subscript equals 100 capital omega comma X subscript L end subscript equals 200 capital omega & R equals 100 capital omega The effective current through the source is

In the circuit diagram shown, X subscript C end subscript equals 100 capital omega comma X subscript L end subscript equals 200 capital omega & R equals 100 capital omega The effective current through the source is

physics-General
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physics-

For the circuit shown in the figure the rms value of voltages across R and coil are E1 and E2 , respectively

The power (thermal) developed across the coil is

For the circuit shown in the figure the rms value of voltages across R and coil are E1 and E2 , respectively

The power (thermal) developed across the coil is

physics-General
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