Air Expands On Heating|Wind Currents

Wind Currents|OMR

Solids expand on heating because

A solid expands upon heating because

Assertion : Wind pollination requires that the pollen grains are light and non-sticky. Reason : Light pollen grains can be transported easily in wind currents.

Heating Effects of current

Heating Effects OF Current||Fuse

Which of the following statement are true (a) Rubber contracts on heating (b) Water expands on freezing (c) Waterr expands on heating from 4^(@)C to 40^(@)C

A carboard tube is wrapped with two winding of insulated wire wound in opposite directions as shown in Fig. 3.24. Terminal a and b of winding A may be connected to a battery through a reversing switch. State whether the induced current in the resistor R from left to right or from right to left in the following cicumstances. (a) The current in winding A is from a to b and is increasing. (b) The current in winding A is from b to a and is decreasing. ( c) The current in winding A is from b to a and is increasing.