Maths-
General
Easy
Question
Represent -7 + 3 on number line
Hint:
We have to represent -7+3 on the number line.
The correct answer is: 
Number line is a line where number are plotted with equal intervals.
The center of the number line is 0. It extends in both positive and negative directions.
To plot any number we start from zero. If the number is positive, we count the places in right direction. If the number is negative, we count the places in left direction.
Let’s represent the given number.
The number is -7+3
The first term is negative. So, we count 7 places from zero in the left direction. We reach -7 on the number line.
Now, “+3” is added to the number. It means 3 places to the right from the number.
After going to the three places to the right we get -4.
So, the option who has final value -4 is the right option. The right option is as follows:

When we add something to the given number, we don’t start counting the second number from zero. We count the places from the number itself. Any negative value means we move in left direction. Any positive value means we move in right direction.
Related Questions to study
Maths-
Statement-I: 
Statement-II: If 0<a<b, then 
Statement-I: 
Statement-II: If 0<a<b, then 
Maths-General
Maths-
Statement-I: 
Statement-II: If a>0, a>b, then 
Statement-I: 
Statement-II: If a>0, a>b, then 
Maths-General
Maths-
Statement-I: 
Statement-II: If a>b then 
Statement-I: 
Statement-II: If a>b then 
Maths-General
Maths-
Statement-I: 
Statement-II: If a<b then 
Statement-I: 
Statement-II: If a<b then 
Maths-General
Maths-
I: 
II:
Which of the following is true
I: 
II:
Which of the following is true
Maths-General
Maths-
I:
II:
Which of the following is true
I:
II:
Which of the following is true
Maths-General
Maths-
I:
II
Which of the following is true
I:
II
Which of the following is true
Maths-General
Chemistry-
The probability density plots of 1s and 2s orbitals are given in figure

The density of dots in region represents the probability density of finding electrons in the region. On the basis of above diagram which of the following statements is incor-rect?
The probability density plots of 1s and 2s orbitals are given in figure

The density of dots in region represents the probability density of finding electrons in the region. On the basis of above diagram which of the following statements is incor-rect?
Chemistry-General
Physics-
In the set up shown in Fig the two slits,
and
are not equidistant from the slit S. The central fringe at O is then

In the set up shown in Fig the two slits,
and
are not equidistant from the slit S. The central fringe at O is then

Physics-General
Physics-
In a Young’s double slit experimental arrangement shown here, if a mica sheet of thickness t and refractive index
is placed in front of the slit
then the path difference 

In a Young’s double slit experimental arrangement shown here, if a mica sheet of thickness t and refractive index
is placed in front of the slit
then the path difference 

Physics-General
Physics-
Following figure shows sources
and
that emits light of wavelength
in all directions. The sources are exactly in phase and are separated by a distance equal to
If we start at the indicated start point and travel along path 1 and 2, the interference produce a maxima all along

Following figure shows sources
and
that emits light of wavelength
in all directions. The sources are exactly in phase and are separated by a distance equal to
If we start at the indicated start point and travel along path 1 and 2, the interference produce a maxima all along

Physics-General
Physics-
Two coherent sources separated by distance d are radiating in phase having wavelength
. A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of n = 4 interference maxima is given as

Two coherent sources separated by distance d are radiating in phase having wavelength
. A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of n = 4 interference maxima is given as

Physics-General
Physics-
A beam with wavelength
falls on a stack of partially reflecting planes with separation d. The angle
that the beam should make with the planes so that the beams reflected from successive planes may interfere constructively is (where n =1, 2, ……)

A beam with wavelength
falls on a stack of partially reflecting planes with separation d. The angle
that the beam should make with the planes so that the beams reflected from successive planes may interfere constructively is (where n =1, 2, ……)

Physics-General
Physics-
Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2
l radian. If there is a maximum in direction D the distance XO using n as an integer is given by

Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by 2
l radian. If there is a maximum in direction D the distance XO using n as an integer is given by

Physics-General
Physics-
Two ideal slits S1 and S2 are at a distance d apart, and illuminated by light of wavelength
passing through an ideal source slit S placed on the line through S2 as shown. The distance between the planes of slits and the source slit is D. A screen is held at a distance D from the plane of the slits. The minimum value of d for which there is darkness at O is

Two ideal slits S1 and S2 are at a distance d apart, and illuminated by light of wavelength
passing through an ideal source slit S placed on the line through S2 as shown. The distance between the planes of slits and the source slit is D. A screen is held at a distance D from the plane of the slits. The minimum value of d for which there is darkness at O is

Physics-General