Physics Class 9th MCQs MCQs - General Science Practice | PakExamPoint
Practise Physics Class 9th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Physics Class 9th MCQs MCQs and revision practice
Study Physics Class 9th MCQs through multiple-choice questions in General Science. This subtopic contains 91 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Physics Class 9th MCQs MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
Explanation To find the pressure, you need to divide the force (20 N) by the area (5 cm^2). Since 1 cm^2 = 0.0001 m^2, the area in square meters is: 5 cm^2 x (0.0001 m^2/cm^2) = 0.0005 m^2 Now, you can calculate the pressure: Pressure = Force / Area = 20 N / 0.0005 m^2 = 40,000 N/m^2 Since 1 N/m^2 = 1 Pascal (Pa), you can convert the pressure to N/cm^2: 40,000 N/m^2 x (1 m^2 / 100 cm^2) = 4 N/cm^2
Explanation Evaporation occurs when molecules on a liquid's surface gain enough energy to escape into the air, and this can happen at any temperature , not just at boiling point. It's a slow process at lower temperatures, but faster at higher temperatures.
Explanation Zero error is a type of systematic error that occurs when the instrument's zero point is not accurately calibrated, resulting in a consistent error in all measurements. Systematic errors are biases that affect the accuracy of a measurement, and zero error is a specific type of systematic error.
Explanation Gravitational force is always attractive , never repulsive. According to Newton's law of universal gravitation , every point mass attracts every other point mass by a force acting along the line intersecting both points. This means that gravity always pulls objects towards each other, never pushes them apart.
Explanation The kinetic energy (K.E) of an object is calculated as: K.E = (1/2) x mass x velocity^2 = (1/2) x 1 kg x (1 m/s)^2 = 0.5 Joule = 1/2 Joule So, the kinetic energy of the body is 1/2 Joule or 0.5 Joule.
اگر ورنیئر اسکیل کی صفر لائن مین اسکیل کے صفر کے ساتھ ملتی ہے، تو صفر کی خرابی ______ ہے؟
A. Zero
B. Negative
C. Positive
D. One
Check answer and explanation
Answer: Zero
Explanation If the zero line of the Vernier scale coincides with the zero of the main scale , it means that there is no zero error. Zero error occurs when the zero of the Vernier scale is not aligned with the zero of the main scale, resulting in a systematic error in the measurements.
خالی شاپنگ کارٹ کو بھری ہوئی ٹوکری کے مقابلے میں دھکیلنا آسان ہے کیونکہ بھری ہوئی ٹوکری میں خالی سے زیادہ مقدار ہوتی ہے۔ اس کا اظہار ______ سے کیا جا سکتا ہے؟
A. F < m
B. F ∝ m
C. F > m
D. F ∝ 1/m
Check answer and explanation
Answer: F ∝ m
Explanation This is a statement of Newton's second law of motion , which states that the force (F) required to accelerate an object is proportional to its mass (m).
Explanation Power is calculated as the rate of work done or energy transferred: Power = Work / Time = 20 J / 10 s = 2 W So, the machine's power output is 2 watts.
Explanation Your weight, as measured on Earth , will be decreased if you move to a planet or moon with a weaker gravitational field. Weight is the force exerted on an object by gravity. It depends on both the mass of the object and the strength of the gravitational field.
Explanation Condensing is the process by which a gas changes state to become a liquid. This occurs when the temperature and pressure of the gas are reduced to the point where the molecules slow down and come together to form a liquid. Key Points: Melting is the process where a solid becomes a liquid. Freezing is the process where a liquid becomes a solid. Boiling is the process where a liquid becomes a gas.
Found a mistake? Use “Report correction” in the practice tool or contact us with the question and a supporting source.