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

Identify the option that displays the correct wiring with correct colour code:

1. Resistance
2. Intensity of light

Rohan conducted experiments on echo in different media. He observed that a minimum distance of 'x' meters is required for the echo to be heard in oxygen and 'y' meters in benzene. Compare 'x' and 'y'. Justify your answer.

Speed of sound in oxygen: 340 ms^-1

Speed of sound in benzene: 200 ms^-1

Below is an incomplete table showing the arrangement of electromagnetic spectrum in the increasing order of their wavelength. Complete the table:

1. Identify the radiation A.
2. Name the radiation used to detect fracture in bones.
3. Name one property common to both A and Radio waves.

Light travels a distance of '10x' units in time 't₁' in vacuum and it travels a distance of 'x' units in time 't₂' in a denser medium. Using this information answer the question that follows:

'Light covers a distance of '20x' units in time 't₁' in diamond'. State true or false.

Name one radiation having the wavelength longer than the wavelength of these radiations.

A metal rod AB of length 80 cm is balanced at 45 cm from the end A with 100 gf weights suspended from the two ends.

1. If this rod is cut at the center, C, then compare the weight of AC to the weight of BC. (Use >, < or =)
2. Give a reason for your answer in (a).

A person standing in front of a cliff fires a gun and hears its echo after 3 s. If the speed of sound in air is 336 ms⁻¹.

1. Calculate the distance of the person from the cliff.
2. After moving a certain distance from the cliff, he fires the gun again, and this time the echo is heard 1.5 s later than the first. Calculate the distance that the person moved.

Observe the given circuit diagram and answer the questions that follow:

1. Calculate the resistance of the circuit when the key K completes the circuit.
2. Calculate the current through 3Ω resistance when the circuit is complete.

A nut is opened by a wrench of length 25 cm. If the least force required is 10 N, find the moment of force needed to turn the nut.

The diagram in Fig shows two forces F₁ = 5 N and F₂ = 3 N acting at points A and B respectively of a rod pivoted at a point O, such that OA = 2 m and OB = 4 m.

Calculate:

1. the moment of force F₁ about O.
2. the moment of force F₂ about O.
3. total moment of the two forces about O.

Name two electromagnetic waves of wavelength smaller than that of violet light.

Define the term resistance.

Two copper wires are of the same length, but one is thicker than the other. Which wire will have more specific resistance?

Name the material of fuse. State one characteristic of the material used for fuse.

State the purpose of using a fuse in a circuit.

How does the length of a fuse wire depend on its current rating?

Two fuse wires are rated 5 A and 20 A. Which of the two is longer ?

'A fuse is rated 8 A'. Can it be used with an electrical appliance of rating 5 kW, 200 V?

Name two safety devices which are connected to the live wire of a household electric circuit.