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Jeneeta Eliza John
Subject: Physics
, asked on 1/5/18
Q.28. Two radioactive substances A and B initially contain equal number of nuclei. A has half life of hour and B has a half life of 3 hour. After 6 hour, the ratio of activity of A to that of B is
(1)
3
16
(2)
13
15
(3)
7
15
(4)
5
13
Answer
1
Aparna Sahu
Subject: Physics
, asked on 18/4/18
Solve qus no. 5:
5. An alpha particle having kinetic energy of 10 MeV is moving towards a stationary nucleus of atomic number 50. The distance of closest approach will be.
(a) 1.44 x 10
-15
m (b) 1.44 x 10
-15
m
(c) 1.44 x 10
-13
m (d) 14.4 x 10
-16
m
Answer
2
Aparna Sahu
Subject: Physics
, asked on 14/4/18
Solve qus no. 27
Answer
3
Manasi Mujumdar
Subject: Physics
, asked on 31/3/18
ans plss
Q.15. An ideal gas with adiabatic constant 5/3 is heated at constant pressure till its volume becomes double. Then the same gas is heated at constant volume till its pressure is doubled. The average value of C (molar heat capacity) for the complete process is
A)
9
2
R
B)
13
6
R
C) 3 R
D)
11
6
R
Answer
1
Aparna Sahu
Subject: Physics
, asked on 23/3/18
Solve this.
Q.
The time it will take a certain radioactive material with a half-life of 50 days to reduce to 1/32 of its original number is
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 16/3/18
No links please
Q). Prove that sensitivity of a Galvanometer is maximum when deflection is 45
°
.
Answer
1
Tanya Pandey
Subject: Physics
, asked on 5/3/18
200 mg of a radioactive sample reduces to 180 mg in 1000 days calculate the decay constant and half Life
Answer
1
Nithyashrri Saravanan
Subject: Physics
, asked on 5/3/18
A 1000 MW fission reactor consumes half of its fuel in 500 y. How much
u
92
235
did it contain initially? Assume the reactor operates 80% of the time, that all the energy generated arises from the fission of
u
92
235
and that this nuclide is consumed only by the fission process.
Answer
1
Afnaan Sayed
Subject: Physics
, asked on 5/3/18
Please can you answer this
Q73. Complete the following nuclear reactions
(i)
B
5
10
+
n
0
1
→
He
2
4
+
.................
(ii)
Mo
42
94
+
H
1
2
→
Te
43
95
+
................
Answer
2
Rayyan Mansuri
Subject: Physics
, asked on 5/3/18
24) The half life of a radioactive element is 2 hr. and that of the other is 4 hr. Their initial activities are equal. After 4 hrs what will be the ratio of their activities?
(
A
)
1
:
2
(
B
)
1
:
1
(
C
)
1
:
4
(
D
)
1
:
3
Answer
1
Afnaan Sayed
Subject: Physics
, asked on 2/3/18
Write the equations for the two types of B-decau .Why is it veey difficult to detect the neutrino ?
Answer
1
Kurian J
Subject: Physics
, asked on 2/3/18
how to find the mass defect of 0xeygen
Answer
1
Jeneeta Eliza John
Subject: Physics
, asked on 1/3/18
How much uranium
U
92
235
should be consumed in a nuclear reactor for giving power of 10
6
watt, if the energy released per fission is 200 MeV?
Answer
1
Jeneeta Eliza John
Subject: Physics
, asked on 1/3/18
One MeV positron encounters 1 MeV electron travelling in opposite directions. What is the wavelength of photons produced? Given rest mass energy of electron or positron = 0.512 MeV and
h
= 6.62 × 10
–34
Js.
Answer
1
Akshit Chaturvedi
Subject: Physics
, asked on 28/2/18
While solving numericals how do we whether a radioactive decay is spontaneous or not?
Answer
1
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2
3
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(1)
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(3)
(4)
5. An alpha particle having kinetic energy of 10 MeV is moving towards a stationary nucleus of atomic number 50. The distance of closest approach will be.
(a) 1.44 x 10-15 m (b) 1.44 x 10-15 m
(c) 1.44 x 10-13 m (d) 14.4 x 10-16 m
Q.15. An ideal gas with adiabatic constant 5/3 is heated at constant pressure till its volume becomes double. Then the same gas is heated at constant volume till its pressure is doubled. The average value of C (molar heat capacity) for the complete process is
A) R
B) R
C) 3 R
D) R
Q. The time it will take a certain radioactive material with a half-life of 50 days to reduce to 1/32 of its original number is
Q). Prove that sensitivity of a Galvanometer is maximum when deflection is 45.
Q73. Complete the following nuclear reactions
(i) .................
(ii) ................