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Santosh KumarEduRev IIT JAM |
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Santosh Kumar
EduRev IIT JAM
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Top Scoring Tests by Santosh
Discussed Questions
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Santosh Kumar upvoted • Mar 07, 2023 |
Consider a radiation cavity of volume V at temperature T. The average number of photons in equilibrium is proportional to Tα , Find α?
Correct answer is '3'. Can you explain this answer?
Consider a radiation cavity of volume V at temperature T. The average number of photons in equilibrium is proportional to Tα , Find α?
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Anisha Pillai answered |
For photons, B-E statistics is applicable
For photons,
the density of states for photons between p and p + dp is
Since two independent direction of polarization
hv = dE
⇒ hdv = dE
Average number of photons
The correct answer is: 3
For photons,
the density of states for photons between p and p + dp is
Since two independent direction of polarization
hv = dE
⇒ hdv = dE
Average number of photons
The correct answer is: 3
The eigen values of matrix A = 
are- a)± 3√3
- b)3, 1
- c)- 1 ± 2 √7
- d)none of these
Correct answer is option 'C'. Can you explain this answer?
The eigen values of matrix A = are
area)
± 3√3
b)
3, 1
c)
- 1 ± 2 √7
d)
none of these
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Santosh Kumar answered • Jan 16, 2023 |
From the property of Eigen values of Matrix we know
1. sum of eigen values = Trace of the matrix.
Trace of the matrix is sum of Principal diagonal elements.
So sum of P.D.E = 3+(-5) =-2
2. Product of Eigen values is equal to the determinant of the Matrix.
So determinant of the matrix= -27
Only option C satisfies the above two results. so option C is the answer
1. sum of eigen values = Trace of the matrix.
Trace of the matrix is sum of Principal diagonal elements.
So sum of P.D.E = 3+(-5) =-2
2. Product of Eigen values is equal to the determinant of the Matrix.
So determinant of the matrix= -27
Only option C satisfies the above two results. so option C is the answer
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Santosh Kumar upvoted • Jan 02, 2023 |
An atom has n = 1 and n = 2 levels filled. How many electrons does the atom have?- a)2
- b)10
- c)8
- d)6
Correct answer is option 'B'. Can you explain this answer?
An atom has n = 1 and n = 2 levels filled. How many electrons does the atom have?
a)
2
b)
10
c)
8
d)
6
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Jayant Mishra answered |
Number of electrons in nth orbit is given by 2n2
∴ total electrons is = 2(1)2 + 2(22)
= 2 + 8 = 10
The correct answer is: 10
∴ total electrons is = 2(1)2 + 2(22)
= 2 + 8 = 10
The correct answer is: 10
A heater coil is cut into two equals parts and only one part is now used in the heater. The heat generated will now be :- a)halved
- b)four times
- c)doubled
- d)one-fourth
Correct answer is option 'C'. Can you explain this answer?
A heater coil is cut into two equals parts and only one part is now used in the heater. The heat generated will now be :
a)
halved
b)
four times
c)
doubled
d)
one-fourth
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Santosh Kumar answered • Jan 03, 2020 |
We know if
H=I^2 Rt
R is halved then H'=I^2Rt/2=H/2
H=I^2 Rt
R is halved then H'=I^2Rt/2=H/2
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Santosh Kumar asked • Jan 03, 2020 |
A heater coil is cut into two equals parts and only one part is now used in the heater. The heat generated will now be :- a)halved
- b)four times
- c)doubled
- d)one-fourth
Correct answer is option 'C'. Can you explain this answer?
A heater coil is cut into two equals parts and only one part is now used in the heater. The heat generated will now be :
a)
halved
b)
four times
c)
doubled
d)
one-fourth
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Jayant Mishra answered |
We know, the relation
When R is halved, then
The correct answer is: doubled
The truth table for the input NAND gate is given by :
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Santosh Kumar answered • Nov 09, 2019 |
Option B is the right ans
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Santosh Kumar asked • Nov 08, 2019 |
The value of current at half power points is- a)
- b)
- c)
- d)
Correct answer is option 'D'. Can you explain this answer?
The value of current at half power points is
a)
b)
c)
d)
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Vedika Singh answered |
The correct answer is: 
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