(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Complete the following sentence :

At a neutral point, the resultant magnetic field is ___________.

Complete the following sentence :

The neutral points of a bar magnet kept with its north pole pointing towards geographic north are located ____________.

What do you understand by the anomalous expansion of water?

Draw a graph between volume and temperature, when 5 cm³ of ice at -10°C is heated to form water at +10°C.

How do fishes survive in frozen lakes?

Explain, why are soft drink bottles not completely filled?

Explain, why does a glass bottle completely filled with water and tightly capped burst when placed in a freezer?

Explain, why are the exposed water pipes lagged with straw during severe winter?

Explain why do vegetables and fruits get damaged during severe frost?

A deep pond of water has its top layer frozen. What will be the likely temperature of water layer just in contact with ice?

A deep pond of water has its top layer frozen. What will be the likely temperature of water layer at the bottom of the pond?

What are hot spots? How can you extract energy from a hot spot, if it does not come in contact with underground water?

Draw a neat and labelled diagram of a simple voltaic cell showing clearly the direction of flow of conventional current and direction of flow of electrons.

Briefly describe the theory of simple voltaic cell.

Why do lines of magnetic force never cross? Why do they never pass through a neutral point?

Give the various methods for demagnetizing a magnet.