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

Give one example of a radio isotope.

State one use of radio isotopes.

In what unit is the power of a lens expressed?

The V-I graph for a series combination and for a parallel combination of two resistors is shown in the figure below. Which of the two A or B. represents the parallel combination? Give reasons for your answer.

Find the equivalent resistance between points A and B.

Find the equivalent resistance between points A and B

Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?

(i) Two sets A and B, of three bulbs each, are glowing in two separate rooms. When one of the bulbs in set A is fused, the other two bulbs also cease to glow. But in set B, when one bulb fuses, the other two bulbs continue to glow. Explain why this phenomenon occurs.

(ii) Why do we prefer arrangements of Set B for house circuiting?

Find the equivalent resistance between A and B

The speed of light in air is 3 × 108 m s-1. Calculate the speed of light in glass. The refractive index of glass is 1.5

Draw a V-I graph for a conductor at two different temperatures. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?

State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator. 

Name a substance of which the resistance remains almost unchanged by the increase in  temperature. 

State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances. 

State how are the two resistors joined with a battery when same current flows in each resistor.

In series combination of resistances ______.

The following diagram shows an object AB and a converging lens L with foci F₁ and F₂. Draw two rays from the object AB and complete the diagram to locate the position of the image CD. Also mark on the diagram the position of eye from where the image can be viewed.

The following diagram shows an object AB and a converging lens L with foci F₁ and F₂ State three characteristics of the image in relation to the object.

A lens forms an erect, magnified, and virtual image of an object. Where is the object placed in relation to the lens?

A lens forms an erect, magnified and virtual image of an object.Draw a ray diagram to show the formation of image.