1 The magnetic field around a straight current carrying conductor consists of: A Straight lines B Circular lines C Elliptical lines D Random lines
3 Which electromagnetic waves are used in remote controls? A Radio waves B Infrared waves C Ultraviolet waves D X-rays
4 The angle between geographic meridian and magnetic meridian is called: A Dip angle B Magnetic declination C Inclination D Deflection
7 A scientific theory is falsifiable if it can be: A Proved true B Observed directly C Tested and proven false D Mathematically solved
8 A solenoid produces a magnetic field similar to that of a: A Bar magnet B Ring magnet C Horseshoe magnet D Circular magnet
9 Background radiation mainly comes from: A Television B Natural sources C Mobile phones D Electric wires
10 Overexposure to ultraviolet radiation may cause A Skin cancer B Hearing loss C Muscle pain D Heart disease
11 The deflection of electron beam in CRO helps to measure: A Mass of electron B Charge of electron C Voltage D Resistance
13 Which factor increases the risk of electromagnetic radiation? A Low frequency B Short wavelength C Low energy D Long wavelength
14 Which device converts electrical energy into mechanical energy? A Generator B Transformer C Electric motor D CRO
16 Which phenomenon proves the particle nature of light? A Diffraction B Interference C Photoelectric effect D Refraction
17 Which statement best defines falsifiability? A Theory must be popular B Theory must be simple C Theory must be testable D Theory must be complex
18 Ionizing radiations mainly cause damage by: A Heating matter B Ionizing atoms C Reflecting light D Producing sound