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

The relationship between the potential difference and the current in a conductor is stated in the form of a law.

1) Name the law.

2) What does the slope of V-I graph for a conductor represent?

3) Name the material used for making the connecting wire.

Name the radiation which can be detected by a thermopile.

What is an Ohmic resistor?

The diagram below shows a lever in use:

1. To which class of levers does it belong?
2. Without changing the dimensions of the lever, if the load is shifted towards the fulcrum what happens to the mechanical advantage of the lever?

Name a machine to obtain gain in speed ?

Name the physical quantity which is measured in calorie. How is it related to the S.I. unit of the quality?

A ray of light from air suffers partial reflection and refraction at the boundary of water. In Fig. 4.16, which of the ray A, B, C, D and E is the correct
(i) refracted ray
(ii) partially reflected ray? 

Differentiate between watt and watt hour.

What is a lever?

State the principle of a lever?

Write down a relation expressing the mechanical advantage of a lever.

Give one example of a class I lever where mechanical advantage is more than one ?

A ray of green light enters a liquid from air, as shown in Fig. The angle 1 is 45° and angle 2 is 30°. 

1. Find the refractive index of the liquid.
2. Show in the diagram the path of the ray after it strikes the mirror and re-enters in air. Mark in the diagram the angles where ever necessary.
3. Redraw the diagram if plane mirror becomes normal to the refracted ray inside the liquid. State the principal used. 

Draw a diagram of a lever which is always used as a force multiplier. How is the effort arm related to the load arm in such a lever?

An electric heater of power 3 kW is used for 10 h. How much energy does it consume? Express your answer in

1. kWh,
2. joule.

shows a nut cracker name the class of lever ?

State two applications of echo.

Explain how the speed of sound can be determined by the method of echo.

State Ohm’s law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it. 

What is the necessary condition for a conductor to obey Ohm’s law?