Mutual inductance of two coils can be increased by
decreasing the number of turns in the coils
increasing the number of turns in the coils
winding the coils on wooden cores
None of these
Assertion: If a heavy nucleus is split into two medium-sized parts, each of the nuclei will have more binding energy per nucleon than the original nucleus.
Reason: Joining two light nuclei together to give a single nucleus of medium size means more binding energy per nucleon than the two nucleus.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false.
n-alpha particles per second are emitted from N atoms of a radioactive element. The half-life of the radioactive element is
Assertion: The ratio for time taken for light emission from an atom to that for release of nuclear energy in fission is 1 : 100.
Reason: Time taken for the light emission from an atom is of the order of 10-8 s.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Static crashes are heard on radio, when lightning flash occurs in the sky.
Reason: Electromagnetic waves having frequency of radio wave range interfere with radio waves.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: γ-radiation emission occurs after decay.
Reason: Energy levels occur in nucleus.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
Most of times β decay leaves the daughter nucleus in an excited state. It excites itself by emitting gamma rays. Sometimes α- decay also leaves daughter nucleus in an excited state causing emission of gamma rays. Like atoms, nuclei also have energy lavels and gamma rays arise because of transitions between these levels.
Gamma radiation often occurs straight after alpha or beta decay. The child nuclide formed often has excess energy which is released by gamma emission.
In nuclear fission, which of the following quantity is conserved?
Energy
Mass
Momentum
Both energy and mass
When a slow neutron is captured by a nucleus, a fission energy releasing 200 MeV. If power of nuclear reactor is 100 W then rate of nuclear fission is
3.6 × 106 s-1
3.1 × 1012 s-1
1.8 × 104 s-1
4.1 × 106 s-1
Which of the following statement is incorrect?
Neutron is less stable than proton
Neutron can cause fission in nuclear reactors but proton can not.
A free proton can emit beta particle.
A bound proton can emit beta particle.
Electric field at a distance r from infinitely long conducting sheet is proportional to
r-1
r-2
r-3/2
independent of r