Physics Test 10 Please don't use any search browser to find the answer. Best of Luck! Please! Enter Password 1 / 50 Thermal conductivity of brass ? 146.87 W/m·K 1000 W/m·K 0.5 W/m·K 15.6 W/m·K 2 / 50 The SI unit of current is the ? Ohm Coulomb Volt Ampere 3 / 50 Highly penetrating rays are______? Ultraviolet rays Beta rays Gamma rays Alpha rays 4 / 50 The speed of a cycle will decrease when moving on a rough surface because of________? Friction Pressure Momentum Acceleration 5 / 50 Human can't hear less than ? 20 Hz 40 Hz 25 Hz 10 Hz 6 / 50 A concave mirror has a_____? Zero focal length Positive focal length Infinite focal length Negative focal length 7 / 50 If the mass of a bob increases by 3 times, the time period of the pendulum will ? Be zero Become 1/3 times remain the same Become 3 times 8 / 50 Loudness is directly proportional to _____? Amplitude Wavelength Time Frequency 9 / 50 Thermal conductivity of water ? 1.5 W/m·K 0.59 W/m·K 100 W/m·K 14.6 W/m·K 10 / 50 In Hooke's law, force is directly proportional to ? Velocity Time Volume Change in length 11 / 50 The rate of change of momentum is equal to ? Energy Acceleration Force Power 12 / 50 In gasses how heat Flow_? Conduction only Convection only Radiation, conduction, and convection Conduction and refraction 13 / 50 A sound measuring meter, also known as a ? Decibel meter Sonic mete Noise meter Vibration meter 14 / 50 Thermal energy types ? 5 4 2 3 15 / 50 Rate of flow of charge ? Resistance Power Voltage Current 16 / 50 A lens that is thick at the outer edges and thin at the middle is called a ? Convex lens Plane lens Biconvex lens Concave lens 17 / 50 Balloons fly in the air because they have a_____? Large surface area Lower density than air Higher pressure High temperature 18 / 50 In 1973, Jim Maxwell, Australian cricket commentator, said that _? Sound needs no medium to travel Sound is noise created by bats sound is a wave of air pressure that travels through the atmosphere. Sound travels only in water 19 / 50 1 mega is equal to? 10⁶ 10³ 10⁴ 10⁹ 20 / 50 A capacitor that is used to store chemical energy is called an ? Ceramic capacitor Electrolytic capacitor Paper capacitor Mica capacitor 21 / 50 In heat, gas is transferred through ? Reflection Radiation Convection Conduction 22 / 50 The hydraulic press is an application of _____? Archimedes' principle Newton’s second law Bernoulli's principle Pascal's law 23 / 50 A wave moves upward and inward across the way if it is ? Interfering Diffracting Reflecting Refracting 24 / 50 The sound intensity of a man is ? 200 Hz 20 Hz 2000 Hz 10 Hz 25 / 50 1 kb is equal to? 1000 bytes 2048 bytes 1024 bytes 128 bytes 26 / 50 How many types of waves ? 2 3 4 5 27 / 50 The unit of potential difference is the ? Ampere Volt Watt Ohm 28 / 50 Plastic is a good ? Insulator Semiconductor Conductor Metal 29 / 50 The restoring force moves a body towards its _______? Mean position Crest Maximum amplitude Node 30 / 50 Hydroelectric power is the energy generated from the ? Wind turbines Movement of water Heat of magma Solar panels 31 / 50 The material between capacitor plates is an insulator, also known as a ? Dielectric Inductor Conductor Resistor 32 / 50 Metals are good conductors due to ? Covalent bonds Protons Ionic bonds Free electrons 33 / 50 Birds fly in air due to ? Their body weight Air current Wind force only Magnetic pull 34 / 50 Non-conductors are also called_______? Amplifiers Insulators Semiconductors Conductors 35 / 50 In gasses, heat can be transferred through ? Convection only None of these Conduction only Radiation 36 / 50 1 kWh is a unit of energy equal to ? 1 joule/second 100 joules 1000 kilojoules 1000 watt-hours 37 / 50 If q is negative, the image is ? Magnified Virtual Erect Real 38 / 50 Astronomers use radio waves in space instead of sound waves because sound waves do not travel through _________? Space Gases Atmosphere Liquids 39 / 50 A diverging lens is also called a ? Convex lens Plano-convex lens Biconvex lens Concave lens 40 / 50 When light enters from a denser to a rarer medium, it bends ? Reflects back Toward the normal Does not bend Away from the normal 41 / 50 The principal focus of a mirror is the point where all the light rays reflected from the ? Surface diverge Center diverge Pole merge Mirrors converge 42 / 50 If q is positive, the image is ? Magnified Real Virtual Erect 43 / 50 If the length doubles between a hot and cold body, the heat flux remains ? Zero Constant Halved Doubled 44 / 50 heat can be transferred in gasses by ? Radiation Expansion Conduction Compression 45 / 50 Alpha rays have high ? Ionization power Magnetic field Penetrating power Frequency 46 / 50 The rate of change of momentum is called ? Impulse Velocity Acceleration force 47 / 50 When we cannot convert a galvanometer into an ammeter, we cannot connect a _____________? Low resistance in series High resistance in parallel Low resistance in parallel High resistance in series 48 / 50 The magnetic field lines of a bar magnet are _? Inside the pipe Discontinuous From south to north Outside the pipe 49 / 50 A liquid has a definite volume but not a ? Definite energy Definite pressure Definite mass Definite shape 50 / 50 To find the ratio of the speed of light in air to the speed of light in a medium, we use the ? Diffraction law Reflection law Photoelectric effect Refraction law Your score is 0% Restart quiz
