Physics-
General
Easy
Question
Two radioactive sources and of half lives 1h and 2h respectively initially contain the same number of radioactive atoms. At the end of two hours, their rates of disintegration are in the ratio of
The correct answer is:
Rate of disintegration Number of atoms left
In case of source
In case of source
Related Questions to study
Physics-
The count rate for 10g of radioactive material was measured at different times and this has been shown in figure with scale given. The half-life of the material and the total count in the first half value period, respectively are
The count rate for 10g of radioactive material was measured at different times and this has been shown in figure with scale given. The half-life of the material and the total count in the first half value period, respectively are
Physics-General
Maths-
then
then
Maths-General
Physics-
Neutron decay in free space is given as follows Then the parenthesis represents a
Neutron decay in free space is given as follows Then the parenthesis represents a
Physics-General
Physics-
The energy band diagrams for three semiconductor samples of silicon are as shown. We can then assert that
The energy band diagrams for three semiconductor samples of silicon are as shown. We can then assert that
Physics-General
Physics-
In extrinsic semiconductors
In extrinsic semiconductors
Physics-General
Physics-
A Ge specimen is doped with Al. The concentration of acceptor atoms is 1021 atoms/m3. Given that the intrinsic concentration of electron hole pairs is , the concentration of electrons in the specimen is
A Ge specimen is doped with Al. The concentration of acceptor atoms is 1021 atoms/m3. Given that the intrinsic concentration of electron hole pairs is , the concentration of electrons in the specimen is
Physics-General
Physics-
The valence band and conduction band of a solid overlap at low temperature, the solid may be
The valence band and conduction band of a solid overlap at low temperature, the solid may be
Physics-General
Physics-
In a P-type semiconductor, germanium is doped with
In a P-type semiconductor, germanium is doped with
Physics-General
Physics-
The impurity atom added to germanium to make it N-type semiconductor is
The impurity atom added to germanium to make it N-type semiconductor is
Physics-General
Physics-
If and be the numbers of holes and conduction electrons in an extrinsic semiconductor, then
If and be the numbers of holes and conduction electrons in an extrinsic semiconductor, then
Physics-General
Physics-
When Ge crystals are doped with phosphorus atom, then it becomes
When Ge crystals are doped with phosphorus atom, then it becomes
Physics-General
Physics-
A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be a correct statement
A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be a correct statement
Physics-General
Physics-
Bonding in a germanium crystal (semi- conductor) is
Bonding in a germanium crystal (semi- conductor) is
Physics-General
Physics-
What is the coordination number of sodium ions in the case of sodium chloride structure
What is the coordination number of sodium ions in the case of sodium chloride structure
Physics-General
Physics-
The expected energy of the electrons at absolute zero is called
The expected energy of the electrons at absolute zero is called
Physics-General