How many times is a ray of light reflected by two plane mirrors placed parallel and facing each other?
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How many times the word ‘Jana’ occur in the Rigveda? (a) 75 times (b) 175 times (c) 275 times (d) 375 times
(c) The term ‘Jana’ occurs 275 times in the Rigveda. But Janapada is not mentioned. The term Rajya occurs only once.
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Do you think the soldiers of the two armies are like each other, or different from each other? Find evidence form the story to support your Ans.
The soldiers of the two armies were like each other. Below are some instances from the story to prove: → Both the armies celebrated Christmas → Both the armies shared their food...
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A point charge +q, is placed at a distance d from an isolated conducting plane. The field at a point P on the other side of the plane is
(a) directed perpendicular to the plane and away from the plane.
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If each edge of a cube is doubled, (i) how many times will its surface area increase? (ii) how many times will its volume increase?
(i) Let initially the edge of the cube be l. Initial surface area = 6l2 If each edge of the cube is doubled, then it becomes 2l. New surface area = 6(2l)2...
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The equation x = b represents a plane parallel to _____ plane.
Since x = 0 represent yz-plane, therefore x = b represent a plane parallel to yz -plane at a unit distance b from the origin.
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A plane is parallel to yz-plane so it is perpendicular to :
Answer is (A) x-axis A plane parallel to yz-plane is perpendicular to x-axis.
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The plane parallel to yz - plane is perpendicular to ________.
The plane parallel to yz-plane is perpendicular to x-axis.
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A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from…….. after reflection from the mirror.
A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from focus. after reflection from the mirror.
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Which of the following are concave mirrors and which convex mirrors ?
Shaving mirror – concave mirror. Car headlight mirror – concave mirror. Searchlight mirror – concave mirror. Driving mirror – convex mirror. Dentist’s inspection mirror – concave mirror. Torch mirror –...
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In the structure of diborane (i) All hydrogen atoms lie in one plane and boron atoms lie in a plane perpendicular to this plane.
(ii) 2 boron atoms and 4 terminal hydrogen atoms lie in the same plane and 2 bridging hydrogen atoms lie in the perpendicular plane.
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