If the radius of a circle is doubled, its area becomes:
A body is moving with a constant speed \(v\) in a circular path of radius \(r\). The magnitude of average velocity after half a revolution is:
Which of the following is the most electronegative element?
If \(\alpha\) and \(\beta\) are the roots of \(x^2-5x+6=0\), the value of \(\alpha^2+\beta^2\) is:
The focal length of a concave mirror is 20 cm. The distance at which an object should be placed to get a real image of same size is:
What is the common name of \(CH_3COOH\)?
A current of 5 A flows through a wire for 10 minutes. The total charge passed is:
The value of \(\sin^2 30^\circ + \cos^2 30^\circ\) is:
Which gas is liberated when an acid reacts with a metal?
The sum of the first 10 terms of an AP with \(a=2\) and \(d=3\) is: