1 The angle made by Earth’s magnetic field with the horizontal is called: A Declination B Inclination C Deviation D Rotation
3 The direction of magnetic field around a current carrying straight wire is given by: A Right hand thumb rule B Left hand rule C Fleming’s right hand rule D Coulomb’s law
4 Which decay results in the emission of an electron? A Alpha decay B Beta decay C Gamma decay D Fusion
5 Which electromagnetic radiation is used in cancer treatment? A Radio waves B Gamma rays C Infrared rays D Microwaves
6 Background radiation mainly comes from: A Television B Natural sources C Mobile phones D Electric wires
7 Which law explains energy release in nuclear reactions? A Ohm’s law B Newton’s law C Einstein’s mass-energy relation D Boyle’s law
9 Electromagnetic waves consist of oscillating A Electric and magnetic fields B Electric charges only C Magnetic poles only D Particles only
10 Which device uses the magnetic effect of current? A Electric heater B Electric bell C Electric bulb D Thermometer
11 Nuclear fission is the process of: A Joining two nuclei B Splitting a heavy nucleus C Electron emission D Ion formation
12 Which electromagnetic wave is safest for human exposure? A Gamma rays B X-rays C Ultraviolet rays D Radio waves
13 The force acting on a moving electron in a magnetic field is: A Electric force B Magnetic force C Gravitational force D Nuclear force
15 Which electromagnetic waves are used in satellite communication? A Ultraviolet rays B Microwaves C X-rays D Gamma rays
16 The induced current flows in such a direction as to oppose the change producing it according to: A Ohm’s law B Faraday’s law C Lenz’s law D Coulomb’s law
17 Which device is used to detect radiation? A Thermometer B Galvanometer C Geiger-Muller counter D Voltmeter
18 Which electromagnetic wave is used in photography? A Radio waves B Visible light C X-rays D Gamma rays
19 Which scattering is responsible for the blue color of the sky? A Mie scattering B Rayleigh scattering C Compton scattering D Photoelectric scattering
20 The speed of electromagnetic waves in vacuum is A 3 × 10^6 m/s B 3 × 10^7 m/s C 3 × 10^8 m/s D 3 × 10^9 m/s
22 Who discovered the atomic nucleus through the gold foil experiment? A J.J. Thomson B Ernest Rutherford C Niels Bohr D James Chadwick
23 An electron beam can be deflected by: A Electric field only B Magnetic field only C Both electric and magnetic fields D Gravitational field
24 The core of a transformer is made of soft iron to: A Increase resistance B Reduce magnetic losses C Increase current D Produce heat
25 The spontaneous change of a nucleus into another nucleus is called: A Fusion B Fission C Nuclear decay D Ionization