Curriculum-aligned Science questions for Class 10 under CBSE. Shortlist topics, practice at your pace, and make every answer count.
A circuit is built with a 12V battery and a combination of resistors, one of which is 4Ω and another 8Ω in series. Calculate the total resistance in the circuit and the current flowing through it using Ohm's Law. Discuss the significance of potential difference in the context of electric circuits and how it relates to the energy transferred to the charges as they move through the circuit.
In a laboratory, a student is tasked with identifying different acids and bases using indicators. They use litmus paper, phenolphthalein, and methyl orange to test various solutions. Explain the Arrhenius concept of acids and bases in terms of H⁺ and OH⁻ ions, and analyze how the indicators would respond to strong acids, weak acids, strong bases, and weak bases. Provide examples of each type of acid and base tested.
A student conducts an experiment using a current-carrying straight conductor placed in a uniform magnetic field. Describe the observations they would make regarding the direction and nature of the magnetic field lines around the conductor, and explain how the Right Hand Thumb Rule can be applied to determine the direction of the magnetic field. Include a discussion on the factors affecting the strength of the magnetic field produced by the conductor.
When zinc reacts with hydrochloric acid, what are the products formed? Write the balanced chemical equation for this reaction.
Identify one chemical property of bases and provide an example of a reaction involving a base and an acid. What are the expected products of this reaction?
When a current passes through a circular loop, it creates a magnetic field. Describe how you would demonstrate this effect experimentally using a compass.
A straight conductor carrying a current of 10 A experiences a magnetic field. Explain how to determine the direction of the magnetic field using the Right-Hand Thumb Rule.
A circuit has a current of 4 A flowing through it. Calculate the total charge that passes through a cross-section of the conductor in 5 seconds. Use the formula Q = I × t.
Explain how resistivity changes with temperature for a typical metallic conductor.
If a conductor has a resistance of 10 ohms and a potential difference of 20 volts, what is the current flowing through it according to Ohm's Law?
When zinc reacts with hydrochloric acid, what gas is produced?
Using the Right Hand Thumb Rule, in which direction will the magnetic field lines appear if the current flows upwards?
A current-carrying conductor is placed in a magnetic field. What happens to the conductor?
What is the result of the neutralization reaction between hydrochloric acid and sodium hydroxide?
Which of the following correctly describes a chemical property of acids?
Which indicator would show a color change in a neutral pH solution?
When hydrochloric acid reacts with sodium carbonate, which of the following products is formed?
In a series circuit containing three resistors of 2Ω, 3Ω, and 5Ω, what is the total resistance?
If the resistivity of a material is 2 x 10^-6 Ωm and the length of the conductor is 10 m with a cross-sectional area of 1 x 10^-4 m², what is the resistance of the conductor?
In a circuit with a 12V battery and a resistor of 4Ω, what is the current flowing through the circuit?