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

Unit of power used in mechanical engineering is ______.

The circuit depicted in the figure is employed for studying Ohm’s Law. Instead of using a standard resistor, a student opts for a glass tube filled with mercury (tube 1), connected to the circuit through two electrodes, E1 and E2. He records the readings of the ammeter and voltmeter, thereby calculating the resistance. The student repeats the experiment by substituting tube 1 with tube 2, where the same amount of mercury fills tube 2.

Neglecting internal resistance of the cell use (> or < or =) to compare:

1. the resistance in both the cases.
2. the voltmeter readings in both the cases.
3. the specific resistance in both the cases.

Name the quantity which is measured in kWh.

Name the quantity which is measured in kW.

Name the quantity which is measured in Wh.

Name the quantity which is measured in eV.

1. Give a list of at least five radiations, in the order of their increasing wavelength, which make up the complete electromagnetic spectrum.
2. Name the radiation mentioned by you in part (a) which has the highest penetrating power.

Name the region just beyond the red end.

Name the region just beyond the violet end, of the spectrum.

A current of 3.2 mA flows through a conductor. If charge on an electron is −1.6 × 10^-19 coulomb, find the number of electrons that will pass each second through the cross section of that conductor.

Define heat capacity and state its SI unit.

A solid of mass 50 g at 150 °C is placed in 100 g of water at 11 °C when the final temperature recorded is 20 °C. Find the specific heat capacity of the solid. (specific heat capacity of water = 4.2 J/g °C)

You have a choice of three metals A, B, and C, of specific heat capacities 900 Jkg^-1 °C^-1, 380 Jkg^-1 °C^-1 and 460 Jkg^-1 °C-1 respectively, to make a calorimeter. Which material will you select? Justify your answer.

Calculate the mass of ice needed to cool 150 g of water contained in a calorimeter of mass 50 g at 32 °C such that the final temperature is 5 °C. Specific heat capacity of calorimeter = 0.4 J g^-1 °C^-1, Specific heat capacity of water = 4.2 J g^-1°C^-1, latent heat capacity of ice = 330 J g^-1.

Calculate the mass of ice required to lower the temperature of 300 g of water 40°C to water at 0°C.

(Specific latent heat of ice = 336 J/g, the Specific heat capacity of water = 4.2J/g°C)

What do you understand by the following statements:

The heat capacity of the body is 60JK^-1.

What do you understand by the following statements:

The specific heat capacity of lead is 130 Jkg^-1K^-1.

State two factors upon which the heat absorbed by a body depends

A boy uses the blue colour of light to find the refractive index of glass. He then repeats the experiment using the red colour of light. Will the refractive index be the same or different in the two cases? Give a reason to support your answer.

A copper vessel of mass 100 g contains 150 g of water at 50°C. How much ice is needed to cool it to 5°C?

Given: Specific heat capacity of copper = 0.4 Jg^-1 °C^-1

The Specific heat capacity of water = 4.2 Jg^-1 °C^-1

The Specific latent heat of fusion ice = 336 Jg^-1