Class 12th

An object of height 1.5cm is placed on the axis of a convex lens of focal length 25cm. A real image is formed at a distance of 75cm from the lens. The size of the image will be

In which of the following alcohols, dehydration takes place most readily in acidic medium?

The superposition of waves can result in

Consider the following reaction

The correct expression in accordance with Gauss's law for magnetism is

A circular beam of light of diameter d=2cm falls on a plane surface of glass. The angle of incidence is 60⁰ and refractive index of glass is $\mu =3/2$ . The diameter of the refracted beam is:

A capacitor is of capacity $C$ and reactance $X$ . If capacitance and frequency become triple then reactance will be

If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is $4/3$ and the fish is 12cm  below the surface of water, the radius of the circle in centimeter is:

An alternating potential V=V₀ sin wt is applied across a circuit. As a result the current I=I₀ Sin $I=I_0 sin \left(\omega t-\frac{\pi }{2}\right)$  flows in it. The power consumed in the circuit per cycle is