YNet StudyHub

1Which type of electromagnetic radiation has the shortest wavelength?

A Radio waves B Microwaves C X-rays D Gamma rays

2What happens to the image distance in a converging lens when the object is moved closer to the lens?

A Increases B Decreases C Remains the same D Reversed

3Which of the following is a unit of electric current?

A Ohm B Volt C Ampere D Watt

4What is the SI unit of frequency?

A Hertz B Newton C Joule D Watt

5What type of motion is exhibited by an object moving in a circle at a constant speed?

A Linear motion B Rotational motion C Uniform circular motion D Oscillatory motion

6Which type of radiation is commonly used in medical imaging to see inside the human body?

A Ultraviolet rays B Infrared radiation C X-rays D Gamma rays

7What happens to the buoyant force acting on an object when it is fully submerged in a fluid?

A Increases B Decreases C Remains the same D Reversed

8What phenomenon describes the emission of electrons from a material when light shines on it?

A Photoelectric effect B Electromagnetic induction C Radioactivity D X-ray emission

9In a cathode ray tube, what is the function of the cathode rays?

A Produce X-rays B Produce visible light C Display images on screen D Heat the tube

10Which of the following is a property of radioactive decay?

A Independent of the element B Accelerated by pressure C Affected by temperature D Exponential decay