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

What material is used for making wire to prepare heating coils? Give a reason.

Why are thick copper wires used as connecting wires?

State the effect of rise in temperature on the resistance of semi-conductors.

Write an expression for the resistance of a conducting wire in terms of its length and area of cross-section.

How does the resistivity of a semiconductor depend on temperature?

How does the resistivity of an alloy such as constantace depends on temperature.

Define the term resistivity and state its S.I. unit. Which will have higher resistivity a conductor or an insulator.

The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?

State expression for Resistance connected in series.

State expression for Resistance connected in parallel.

State expression for Cells connected in parallel.

Write an expression for calculating electrical power in terms of current and resistance.

State a relation between electrical power, resistance and potential difference in an electrical circuit.

What is a resistance? Define it with respect to Ohm’s law,

State and explain the laws of resistance.

You are provided with three resistors of resistance 1.0 Ω, 2.0 Ω and 3.0 Ω How would you connect them to obtain the total effective resistance 1.5 Ω? Draw diagram of the arrangement and check it by calculations.

Calculate the equivalent resistance between the points A and B for the following combination of resistors:

Calculate the equivalent resistance between P and Q from the following diagram:

Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.

Four resistances of 2.0Ω each are joined end to end, to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent comers.