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Maths-
If cot ,then cos is equal to
If cot ,then cos is equal to
Maths-General
Physics-
On bombarding by slow neutrons, 200MeV energy is released. If the power output of atomic reactor is 1.6 MW, then the rate of fission will be
On bombarding by slow neutrons, 200MeV energy is released. If the power output of atomic reactor is 1.6 MW, then the rate of fission will be
Physics-General
Maths-
if cos , cos x and cos are in HP, then cos is equal to
if cos , cos x and cos are in HP, then cos is equal to
Maths-General
Maths-
if cot , then is equal to
if cot , then is equal to
Maths-General
Maths-
Given ,then the expressions equal to
Given ,then the expressions equal to
Maths-General
Maths-
Maths-General
Maths-
If |sinx + cosx| = |sinx| + |cosx|, then x belongs to the quadrant
If |sinx + cosx| = |sinx| + |cosx|, then x belongs to the quadrant
Maths-General
Maths-
Maths-General
Maths-
Maths-General
Physics-
Cadmium rods are used in a nuclear reactor for
Cadmium rods are used in a nuclear reactor for
Physics-General
Physics-
To determine the half- life of radioactive element, a student plots graph of ln t. Here is the rate of radioactive decay at time t. If the number of radioactive nuclei of this element decreases by a factor of after 4.16 yr, the value of is
To determine the half- life of radioactive element, a student plots graph of ln t. Here is the rate of radioactive decay at time t. If the number of radioactive nuclei of this element decreases by a factor of after 4.16 yr, the value of is
Physics-General
Physics-
In Bohr model of hydrogen atom, the force on the electron depends on the principal quantum number as
In Bohr model of hydrogen atom, the force on the electron depends on the principal quantum number as
Physics-General
Physics-
Assertion : All the radioactive elements are ultimately converted in lead.
Reason : All the elements above lead are unstable.
Assertion : All the radioactive elements are ultimately converted in lead.
Reason : All the elements above lead are unstable.
Physics-General
Physics-
Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason : According to classical physics all moving electrons radiate.
Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason : According to classical physics all moving electrons radiate.
Physics-General
Physics-
The figure shows a graph between and ln|n|, where is the area enclosed by the nth orbit in a hydrogen like atom. The correct curve is
The figure shows a graph between and ln|n|, where is the area enclosed by the nth orbit in a hydrogen like atom. The correct curve is
Physics-General