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

A cell of e.m.f 2.0 V and internal resistance 1Ω is connected to the resistors of 3Ω and 6Ω in series. Calculate:
(i) the current drawn from the cell,
(ii) the p.d. across each resistor,
(iii) the terminal voltage of the cell and
(iv) the voltage drop.

A current of 0.2 A flows through a conducting wire for 5 minutes. How much charge will flow?

A current of 100 mA. flows through a wire. The charge on an electron is 1.6 × 10^-19 C. Find the number of electrons passing per second through the cross-section of the conductor.

An electric bulb draws 0.5 A current at 3.0 V. Calculate the resistance of the filament of the bulb.

Two bulbs are marked 100 W, 220 V and 60 W, 110 V. Calculate the ratio of their resistances.

A 10 m long wire of a particular material is of reistance 5Ω What will be the resistance of 5m long wire of same material and the same thickness.

A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance of 10m long wire of the same material but the double radius.

A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is doubled itself.

A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is stretched to double its length?

Name the subjective property of light related to its wavelength.

State the nature and position of the object on the principal axis to obtain a real and magnified image.

When does a ray of light falling on a lens pass through it undeviated?

The diagram showed a lens as a combination of one glass block and two prisms. Complete the ray diagram and show the part of the incident ray AB after passing through the lens.
(i) Name of the lens formed by the combination.
(ii) What is the line XX’ called?
(iii) Mark the focus F.

Complete the following diagram and state what happens to the ray of light after refraction through the lens.

Complete the following diagram and state what happens to the ray of light after refraction through the lens.

Complete the following diagram and state what happens to the ray of light after refraction through the lens.

In the following diagram, L₁ and L₂ are the two convex lense placed at separation equal to the sum of focal lengths of the two lenses. A and B are the two rays of light incident on the lens L₁. Complete the path of rays till they emerge out of the lens L₂.

What principles have you used in completing the diagram?

Which characteristic property of light is responsible for the blue colour of the sky?

Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.

How can the presence of ultraviolet radiation be detected?