(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

A metre scale of weight 50 gf can be balanced at 40 cm mark without any weight suspended on it.

1. If this ruler is cut at its centre then state which part [0 to 50 cm or 50 to 100 cm] of the ruler will weigh more than 25 gf.
   
2. What minimum weight placed on this metre ruler can balance this ruler when it is pivoted at its centre?

Linear magnification (m) produced by a concave lens is ______.

Copy and complete the labelled diagram connecting the two pulleys with a tackle to obtain Velocity Ratio= 2.

If Load = 48 kgf and efficiency is 80% then calculate:

1. Mechanical Advantage.
2. Effort needed to lift the load.
   

The adjacent diagram shows the movable block of a block and tackle system with effort in a convenient direction. From the diagram we can conclude that the number of pulleys used in the fixed block are ______.

According to the old convention, the colour of the earth wire is ______.

In a block and tackle system, increase in the weight of the movable block ______ the efficiency of the pulley system.

Name the law used to identify the radioactive radiation emitted by the element.

Explain the motion of a planet around the sun in an elliptical path.

A water pond appears to be 3 m deep. If the refractive index of water is 4/3, find the actual depth of the pond.

A coin is placed at the bottom of a beaker containing water (refractive index = 4/3) at a depth of 16 cm. By what height the coin appears to be raised when seen from vertically above?

What is the colour code for the insulation on the earth wire?

What is the colour code for the insulation on the neutral?

Name the colour code of the wire which is connected to switch for the appliance. 

A power circuit uses a cable having three different wires. Between which of the two wires should the heating element of an electric geyser be connected?

A power circuit uses a cable having three different wires. To which wire should the metallic case of the geyser be connected?

A power circuit uses a cable having three different wires. To which wire should the switch and fuse be connected?

The mass number and atomic number of an element are not changed when it emits ______.

Jatin puts a pencil into a glass container having water and is surprised o see the pencil in a different state.

1) What change is observed in the appearance of the pencil?

2) Name the phenomenon responsible for the change.

3) Draw a ray diagram showing how the eye sees the pencil.

Name the form of energy stored in a wound up spring of a watch.