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1What causes an object to sink in a fluid?

A Weight is less than upthrust B Weight is equal to upthrust C Weight is greater than upthrust D Weight is not a factor

2In which direction does centripetal force act in uniform circular motion?

A Outwards B Inwards C Upwards D Downwards

3What type of electromagnetic wave has the shortest wavelength?

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

4What is the principle behind how a thin lens forms an image?

A Refraction B Reflection C Diffraction D Interference

5Which phenomenon is responsible for the generation of an electric current in a wire moving in a magnetic field?

A Electromagnetic induction B Photoelectric effect C Radioactivity D Electrolysis

6What component of an electrical circuit controls the amount of current flowing in the circuit?

A Resistor B Capacitor C Transistor D Diode

7Which type of radiation is used in a cathode ray tube?

A Alpha radiation B Beta radiation C Gamma radiation D Cathode rays

8What type of radiation is produced when high-speed electrons strike a metal target?

A X-rays B Gamma rays C Cathode rays D Alpha particles

9What is the main energy source for stars like the Sun?

A Nuclear fusion B Nuclear fission C Chemical reaction D Gravitational potential energy

10What phenomenon explains the emission of electrons from a metal surface when light shines on it?

A Photoelectric effect B Radioactivity C Electromagnetic induction D Thermionic emission