P-2 Introduction to Microbiology — Science STD 10 — Question

An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?

What do you mean by coenzymes?

A small object is so placed in front of a convex lens of 5cm focal length that a virtual image is formed at a distance of 25cm. Find the magnification

A concave lens has focal length 15cm. At what distance should the object from the lens be placed so that it forms an image at 10cm from the lens? Also find the magnification produced by the lens.

Explain how, geothermal energy is used to generate electricity.

State the limitations of Dobereiner’s law of triads.

Which new species of the rice have been developed in India?

Define heredity. Explain the mechanism of hereditary changes.

A 6m long wire made from an alloy, nichrome, is shaped into a coil and given for producing heat. It has a resistance of 24 ohm. Can we get more heat if the wire is cut into half of its original length and shaped into a coil? For getting Energy, the two ends of the wire are connected to a source with a potential difference of 220 V.