SSLC Model Exam Physics Question Paper with Answers

SSLC model exams are crucial for students to assess their preparation before the final exams. In this guide, you will find 50 important physics questions with detailed answers to help you understand concepts and practice effectively. These questions cover theory, numericals, and conceptual questions aligned with the syllabus.

Physics Questions and Answers

Question: What is the unit of force in the SI system?

Answer: The unit of force in the SI system is Newton (N).

Question: State Newton’s first law of motion.

Answer: Newton’s first law states that an object will remain at rest or in uniform motion unless acted upon by an external force.

Question: What is acceleration due to gravity?

Answer: Acceleration due to gravity is the acceleration experienced by an object due to the gravitational pull of the Earth, and its value is approximately 9.8 m/s².

Question: Define potential energy.

Answer: Potential energy is the energy possessed by an object due to its position or configuration.

Question: Write the formula for calculating work.

Answer: Work is calculated using the formula: Work = Force × Displacement × cos(θ).

Question: What is the speed of light in a vacuum?

Answer: The speed of light in a vacuum is 3 × 10⁸ m/s.

Question: State Ohm’s Law.

Answer: Ohm’s Law states that the current through a conductor is directly proportional to the voltage across it, provided the temperature remains constant.

Question: What is the difference between mass and weight?

Answer: Mass is the amount of matter in an object, while weight is the force exerted on the object due to gravity.

Question: What is the formula for kinetic energy?

Answer: Kinetic energy is calculated using the formula: KE = ½ mv², where m is mass and v is velocity.

Question: Explain the term ‘refraction of light.’

Answer: Refraction is the bending of light as it passes from one medium to another with a different optical density.

Question: Define the term ‘electric current.’

Answer: Electric current is the flow of electric charge through a conductor, and it is measured in amperes.

Question: What are the primary colors of light?

Answer: The primary colors of light are red, green, and blue.

Question: State the principle of conservation of energy.

Answer: The principle of conservation of energy states that energy can neither be created nor destroyed; it can only be transformed from one form to another.

Question: What is a scalar quantity?

Answer: A scalar quantity has only magnitude and no direction, such as distance and speed.

Question: What is the wavelength of visible light?

Answer: The wavelength of visible light ranges from 400 nm to 700 nm.

Question: Define power in physics.

Answer: Power is the rate at which work is done or energy is transferred.

Question: What is the SI unit of power?

Answer: The SI unit of power is Watt (W).

Question: What is the formula to calculate pressure?

Answer: Pressure is calculated using the formula: Pressure = Force / Area.

Question: What is meant by uniform motion?

Answer: Uniform motion refers to the motion of an object at a constant speed in a straight line.

Question: Define electric potential.

Answer: Electric potential is the work done to move a unit positive charge from infinity to a point in an electric field.

Question: What is the unit of frequency?

Answer: The unit of frequency is Hertz (Hz).

Question: What is the relationship between wavelength, frequency, and speed of a wave?

Answer: The relationship is given by the formula: Speed = Wavelength × Frequency.

Question: What is nuclear fission?

Answer: Nuclear fission is the splitting of a heavy atomic nucleus into smaller nuclei, releasing a large amount of energy.

Question: Define displacement.

Answer: Displacement is the shortest distance between the initial and final positions of an object, along with its direction.

Question: What is a convex lens?

Answer: A convex lens is a lens that is thicker at the center than at the edges and converges light rays.

Question: Explain the term ‘momentum.’

Answer: Momentum is the product of an object’s mass and velocity.

Question: State the second law of thermodynamics.

Answer: The second law of thermodynamics states that the total entropy of an isolated system always increases over time.

Question: What is a magnetic field?

Answer: A magnetic field is the region around a magnet where magnetic forces can be observed.

Question: What is the principle of flotation?

Answer: The principle of flotation states that an object will float in a fluid if the buoyant force acting on it is equal to its weight.

Question: Define latent heat.

Answer: Latent heat is the amount of heat required to change the state of a substance without changing its temperature.

Question: What is the difference between concave and convex mirrors?

Answer: A concave mirror converges light rays, while a convex mirror diverges them.

Question: What is the Doppler effect?

Answer: The Doppler effect is the change in frequency or wavelength of a wave as observed by an observer moving relative to the source of the wave.

Question: What is a diode?

Answer: A diode is a semiconductor device that allows current to flow in one direction only.

Question: Define escape velocity.

Answer: Escape velocity is the minimum speed required for an object to break free from a planet’s gravitational pull.

Question: What is a vector quantity?

Answer: A vector quantity has both magnitude and direction, such as velocity and force.

Question: Explain the term ‘simple harmonic motion.’

Answer: Simple harmonic motion is a type of periodic motion where the restoring force is directly proportional to displacement.

Question: What is the principle of a transformer?

Answer: A transformer works on the principle of electromagnetic induction to change the voltage of alternating current.

Question: What is a capacitor?

Answer: A capacitor is a device used to store electrical energy in an electric field.

Question: Define impulse.

Answer: Impulse is the product of force and the time duration over which it acts.

Question: What is resonance?

Answer: Resonance occurs when the frequency of an external force matches the natural frequency of a system, causing it to oscillate with maximum amplitude.

Question: What is a superconductor?

Answer: A superconductor is a material that exhibits zero electrical resistance below a certain temperature.

Question: What is centrifugal force?

Answer: Centrifugal force is the apparent outward force on a mass when it is rotated.

Question: Define torque.

Answer: Torque is the rotational equivalent of force and is given by the formula: Torque = Force × Perpendicular distance from the axis of rotation.

Question: What is the principle of a lever?

Answer: The principle of a lever is that it allows a small force to lift a larger load by increasing the distance over which the force acts.

Mastering physics concepts is essential for excelling in the SSLC exams. The above questions and answers are designed to enhance your understanding and boost your confidence. With consistent practice, you can achieve excellent results and strengthen your foundation for future studies.