Positive and Negative Numbers

Q.

If we are at - 7 on the number line and move 9 units to the right, we would reach ___.

1. 2

2. 0

3. -16

4. -1

Q.

The greatest negative integer is ____ and the smallest positive integer is _____.

1. -1 and +1

2. +1 and -1

3. -1 and -1

4. +1 and +1

Q.

-4, -11, 0, 1, 8 and 47 are collectively classified as

1. whole numbers

2. natural numbers

3. integers

4. negative numbers

Q.

Integers can be classified as:

1. Positive integers

2. Negative integers

3. Fractions

4. Zero

Q.

If profit is represented by a '+' sign and loss is represented by a '-' sign, how will you represent a profit of ₹109 and loss of ₹901?

1. -₹109 and +₹901 respectively.

2. +₹109 and +₹901 respectively.

3. -₹109 and -₹901 respectively.

4. +₹109 and -₹901 respectively.

Q. If any light ray is sent along the line parallel to the axis of the parabola then the reflected ray passes through the.

Q. If an incident ray from the point $(-1,2)$ parallel to the axis of the parabola
$y^2=4x$ strikes the parabola, then what is the equation of the reflected ray?

1. $3x=2$
2. $2x+3=0$
3. $x=1$
4. $x=-1$

Q. Let $S$ be a curved mirror passing through $(3,4)$ having the property that all the light emerging from origin(focus) , after getting reflected from the mirror becomes parallel to $x-$axis. The angle between the tangents drawn from the point $(-2,6)$ is ${90}^{\circ }$. If the circle $(x-4{)}^2+y^2=r^2$ internally touches the curve $S,$ then the value of $r^2$ is

Q. A ray of light strikes a parabolic mirror, the angle of incidence if the angle of reflecttion is ${80}^{\circ }$ is

1. ${40}^{\circ }$
2. ${80}^{\circ }$
3. ${160}^{\circ }$

Q. If a ray of light along the line $y=4$ gets reflected from a parabolic mirror whose equation is $(y-2{)}^2=4(x+1)$, then equation of reflected ray will be