Question : Which of the following statements is INCORRECT?

Option 1: If a chord is extended outside the circle on both ends then it is called a secant.

Option 2: Tangent is perpendicular to the radius of the circle at the point of contact.

Option 3: A line intersecting at two distinct points of a circle is called a tangent.

Option 4: A tangent is a line touching only one point of the circle.

Question : The distance-time graph for the motion of an object moving with a constant speed is a ______.

Option 1: dot

Option 2: circle

Option 3: straight line

Option 4: curve

Question : Which among the following is false about Earth ?

Option 1: It is the densest planet.

Option 2: It is the fifth largest planet

Option 3: It is also known as red planet

Option 4: It is the third planet from sun. 

Question : Which one of the following is the greatest circle ?

Option 1: Arctic circle

Option 2: Equator

Option 3: Tropic of cancer

Option 4: Tropic of capricorn

Question : Two chords of lengths $a$ metre and $b$ metre subtend angles $60^{\circ}$ and $90^{\circ}$ at the centre of the circle, respectively. Which of the following is true?

Option 1: $b=\sqrt{2}a$

Option 2: $a=\sqrt{2}b$

Option 3: $a=2b$

Option 4: $b=2a$