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

Find the value of current I drawn from the cell.

1. Calculate the current I.
2. Calculate the terminal voltage.

The diagram below shows a cardboard on which iron filings are kept. A wire bent in the form of a loop is seen passing through the cardboard. When current flows through it, the iron filings arrange themselves as shown below.

1. State the polarities of the battery at A and B.
2. State the effect on the magnetic field if an iron rod is held along the axis of the coil.
3. State one way to:
   1. Change the polarity of the coil.
   2. Decrease the strength of the magnetic field around the coil.

The potential difference between terminals of a cell in a closed electric circuit is ______.

State two factors affecting the coil's rotation speed in a D.C. motor.

The image of a candle flame placed at a distance of 36 cm from a spherical lens, is formed on a screen placed at a distance of 72 cm from the lens. Calculate the focal length of the lens and its power.

A lens of power +2·5D is kept in contact with another lens of power -2·5D. Draw the path of a ray passing through the lens combination.

Explain the meaning of the term terminal voltage of a cell.

State the principle of an electric motor.

What is electromagnetic induction?

At what voltage is this current available to our household?

What happens to the resistivity of semiconductor with the increase of temperature?

A cell of Emf 2 V and internal resistance 1.2 Ω is connected with an ammeter of resistance 0.8 Ω and two resistors of 4.5 Ω and 9 Ω as shown in the diagram below:

1) What would be the reading on the Ammeter?

2) What is the potential difference across the terminals of the cell?

Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.

State the energy change in the following device while in use:
A loudspeaker

State the energy change in the following device while in use:

A glowing electric bulb.

What is nuclear energy?

Name the process used for producing electricity using nuclear energy.

State one important advantage and disadvantage each of using nuclear energy for producing electricity.

(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.

Name a common device that uses electromagnets.