This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
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Here are the answers to the questions from the image: Question 1: Beta particles are Beta particles are high-energy, high-speed electrons* or positrons emitted by certain types of radioactive nuclei. The correct option is D. Question 2: A kilometre is larger than a millimetre by 1 kilometre = 1000 metres = 10^3 metres. 1 millimetre = 0.001 metres = 10^-3 metres. The ratio is 10^3 m10^-3 m = 10^3 - (-3) = 10^6. So, a kilometre is one million times larger than a millimetre. The correct option is B. Question 3: Which of the following properties is not correct about photons? They Photons are particles of light. They have zero rest mass, always travel at the speed of light in a vacuum, and are always in motion. They do not have mass when at rest. The incorrect statement is that they have mass at rest. The correct option is D. Question 4: Gravitational field intensity is I. Gravitational field intensity is a vector* quantity, not a scalar, as it has both magnitude and direction. II. Due to the Earth's shape and rotation, gravitational acceleration (and thus intensity) is greatest at the poles*. III. At the centre of the Earth, the net gravitational force is zero, so the gravitational field intensity is zero*. Statements II and III are correct. The correct option is C. Question 5: The temperature difference of 1K is equivalent to The Kelvin scale and the Celsius scale have the same size degree increments. Therefore, a temperature difference of 1 K is equivalent to a temperature difference of 1^ C. The correct option is A. Question 8: All of the following constants except Planck's constant, the gravitational constant, and the speed of light in a vacuum are fundamental physical constants. The refractive index of glass* is a material property that varies depending on the type of glass and the wavelength of light, so it is not a universal constant. The correct option is D. Question 9: SONAR is a device used by to detect underwater objects and primary characteristic utilized. SONAR (Sound Navigation And Ranging) uses sound waves to detect objects underwater. It works by emitting sound waves and detecting their reflection* off objects. The correct option is B. Question 10: The lost volt of a cell is the potential difference across The "lost volt" refers to the voltage drop that occurs across the internal resistance* of a cell when current flows through it. This voltage is "lost" internally and does not contribute to the external circuit. The correct option is C. What's next?