Maths-
General
Easy
Question
The two consecutive prime numbers with a difference 2 are called
- Co-primes
- Twin primes
- Composite
- None
The correct answer is: Twin primes
Related Questions to study
Physics-
Which of the following will have the least value of q/m
Which of the following will have the least value of q/m
Physics-General
Physics-
One mole of an ideal monoatomic gas undergoes a cyclic process as shown in figure. Temperature at point 1 = 300 K and process 2-3 is isothermal. The efficiency of cycle is
One mole of an ideal monoatomic gas undergoes a cyclic process as shown in figure. Temperature at point 1 = 300 K and process 2-3 is isothermal. The efficiency of cycle is
Physics-General
Physics-
One mole of an ideal monoatomic gas undergoes a cyclic process as shown in figure. Temperature at point 1 = 300 K and process 2-3 is isothermal. Heat capacity of process null is
One mole of an ideal monoatomic gas undergoes a cyclic process as shown in figure. Temperature at point 1 = 300 K and process 2-3 is isothermal. Heat capacity of process null is
Physics-General
Physics-
The ionisation potential of H-atom is 
. When it is excited from ground state by monochromatic radiations of 
, the number of emission lines will be (according to Bohr’s theory)
The ionisation potential of H-atom is . When it is excited from ground state by monochromatic radiations of , the number of emission lines will be (according to Bohr’s theory)
Physics-General
Physics-
A 7Li target is bombarded with a proton beam current of 10-4A for 1 hour to produce. 7Be of activity 1.8 x 108 disintegrations per second. Assuming that one 7Be radioactive nucleus is produced by bombarding 1000 protons. Half life of 7Be is ………….. (approx.)
A 7Li target is bombarded with a proton beam current of 10-4A for 1 hour to produce. 7Be of activity 1.8 x 108 disintegrations per second. Assuming that one 7Be radioactive nucleus is produced by bombarding 1000 protons. Half life of 7Be is ………….. (approx.)
Physics-General
Physics-
The mean lives of a radioactive substance are 1620 years and 405 years for 
-emission and 
-emission respectively. The time during which three fourth of a sample will decay if it is decaying both by -emission and -emission simultaneously.
The mean lives of a radioactive substance are 1620 years and 405 years for -emission and -emission respectively. The time during which three fourth of a sample will decay if it is decaying both by -emission and -emission simultaneously.
Physics-General
Physics-
A strong magnetic field is applied on a stationary electron, then
A strong magnetic field is applied on a stationary electron, then
Physics-General
Physics-
Three particles having their charges in the ratio of 1 : 3 : 5 produce the same spot on the screen in Thomson’s experiment. Their masses are in the ratio of
Three particles having their charges in the ratio of 1 : 3 : 5 produce the same spot on the screen in Thomson’s experiment. Their masses are in the ratio of
Physics-General
Physics-
A wire carrying current I and other carrying 2I in the same direction produces a magnetic field B at the mid point. What will be the field when 2I wire is switched off
A wire carrying current I and other carrying 2I in the same direction produces a magnetic field B at the mid point. What will be the field when 2I wire is switched off
Physics-General
Physics-
A coil having N turns carry a current I as shown in the figure. The magnetic field intensity at point P is
A coil having N turns carry a current I as shown in the figure. The magnetic field intensity at point P is
Physics-General
Physics-
Which of the following gives the value of magnetic field according to, Biot-Savart’s law'.
Which of the following gives the value of magnetic field according to, Biot-Savart’s law'.
Physics-General
Physics-
Which of the following will have the least value of 
Which of the following will have the least value of
Physics-General
Physics-
One Tesla is equal to
One Tesla is equal to
Physics-General
Physics-
The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve
The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve
Physics-General
Physics-
The value of stopping potential in the following diagram
The value of stopping potential in the following diagram
Physics-General
