Refraction through a Lens — Physics STD 10 — Question

Electromagnetic induction is induction of___________ [electric field/magnetic field] due to the presence of external ___________ [magnetic field/electric field].

Fill in the following blank using suitable word:
The amount of heat required to change the state of a physical substance without any change of temperature is called .......... of the substance.

Good conductors have a ___________ [large / less] concentration of electrons, offer ___________ [large / less] resistance.

Refracted ray is parallel to the base while in __________ [minimum deviation/maximum deviation/Zero deviation] position.

Complete the following sentence:
The pitch of sound increases if its frequency …………..

The unit in which the consumer pays the cost of electrical energy consumed is ___________ [Wh/kWh/J].

When a liquid is solidified, it many either expand or contract. As water freezes to form ice it ........... And .............. in volume by ............. per cent.

Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Transformer______.

The potential is ___________ [negative / positive / neutral ] at a point in the vicinity of a positive charge.