List of practice Questions

Write three differences between axial position and equatorial position in a magnet.
What is ultraviolet light? Write its two characteristics.
Describe the role of computers in education and healthcare.
Explain how to use basic formulas for addition and average in MS Excel.
What is the difference between RAM and ROM?
Define a file and explain how it differs from a folder.
What is a web browser and a search engine? Give examples of each.
What is a computer virus, and how can antivirus software protect your system?
Describe the primary functions of the Central Processing Unit (CPU).
Explain the difference between LAN (Local Area Network) and WAN (Wide Area Network).
Explain the steps to create, save, and print a document in MS Word.
What is an Operating System (OS)? Name two popular examples like Windows or Linux.
Shiv, Ravi, and Roshan are partners. During 2023–24, Shiv withdrew ₹15,000 in the middle of each half-year; Ravi withdrew ₹20,000 for personal insurance; Roshan withdrew ₹12,000 from his capital. What is the interest on drawings at 6% p.a.?
If Bohr’s quantization postulate (angular momentum \( = \frac{nh}{2\pi} \)) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why, then, do we never speak of quantization of orbits of planets around the Sun? Explain.
If both the number of protons and the neutrons are conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.
What is displacement current (\( i_d \))? Considering the case of charging of a capacitor, show that \( i_d = \varepsilon_0 \frac{d\Phi_E}{dt} \). What is the value of \( i_d \) for a conductor across which a constant voltage is applied?
Two parallel plate capacitors X and Y are connected in series to a 6 V battery. They have the same plate area and same plate separation but capacitor X has air between its plates, whereas capacitor Y contains a material of dielectric constant 4. Calculate the capacitances of X and Y, if the equivalent capacitance of the combination of X and Y is \( 4 \, \mu\text{F} \). Calculate the potential difference across the plates of X and Y.
Two thin lenses of focal length \( f_1 \) and \( f_2 \) are placed in contact with each other coaxially. Prove that the focal length \( f \) of the combination is given by \[ f = \frac{f_1 f_2}{f_1 + f_2}. \]
A tank is filled with a liquid to a height of \( 12.5 \, \text{m} \). The apparent depth of a needle lying at the bottom of the tank is measured to be \( 9.0 \, \text{m} \). Calculate the speed of light in the liquid.
What is the role of a Moisturizer ?
What is used as a finishing agent for cleansing ?
What is the process of removal of impurities accumulated in the skin pores known as ?
Which of the following is a consequence of unsustainable practices that harm ecosystem and biodiversity ?
Which function of an entrepreneur involves to create a new method, idea or product ?
Which type of files are typically removed during a routine cleanup to optimize computer performance ?