PHYSICS TEST 1 Please don't use any search browser to find the answer. Just do it yourself so you can measure your knowledge power. Best of Luck! Please! Enter Password 1 / 50 Which of the following is least multiple: Femto Nano Pico Atto 2 / 50 Pull of earth on a mass of 20 kg on the surface of the earth is 19.6 N 20 N 196 N 1960 N 3 / 50 The frequency of waves produced in microwaves oven is: 2450 MHz 1435 MHz 2850 MHz 1860 MHz 4 / 50 If a radioactive isotope of silver have a half life of about 7.5 days. After 15 days the remaining isotope of its original is 7.5% 15% 25% 50% 5 / 50 Heat is the form of: Motion Work Power Energy 6 / 50 If a body of mass 10 kg is allowed to fall freely, its weight becomes. 10N 98N zero 9.8N 7 / 50 Slope of velocity time graph is Acceleration Momentum Distance Force 8 / 50 How many times per second will an incandescent lamp reach maximum brilliance when connected to a 50Hz source? 100 times None of these 200 times 50 times 9 / 50 The critical temperature for mercury is: 4.2 K 3.7 K 1.18 K 7.2 K 10 / 50 The oscillations in which amplitude decreased steadily with time are called: Natural oscillations Damped oscillations Forced oscillations Free oscillation 11 / 50 Which of the following is not present in AC generator: Slip rings Armature Magnet Commutator 12 / 50 The constant K in Coulomb’s Law depends upon System of units Nature of medium Intensity of charge Both a & b 13 / 50 Photon ‘A’ has twice the energy of photon ‘B’. What is the ratio of the momentum of ‘A’ to that of ‘B’? 2 : 1 None 1 : 2 4 : 1 14 / 50 Doppler Effect applies to Neither sound nor light wave Both sound and light wave Light wave only Sound wave only 15 / 50 The idea of quantization of energy was proposed by Compton None of these Max Planck Einstein 16 / 50 Distance covered during one vibration of an oscillating body in term of amplitude A is: 𝐴 /2 2𝐴 4𝐴 𝐴 17 / 50 During projectile motion, the horizontal component of velocity: Changes with time Remains constant Becomes zero Increases with time 18 / 50 Lenz’s law is in accordance with the law of conservation of: Energy Angular momentum Momentum Charge 19 / 50 The charges on the quarks are None of these Fraction Half unit One unit 20 / 50 Boyle’s law holds for ideal gases in Isobaric processes Adiabatic processes Isochoric processes Isothermal processes 21 / 50 LASER light has the property of: Sound waves Non-coherent waves Water waves Coherent waves 22 / 50 During charging of a capacitor, the ratio of instantaneous charge and maximum charge on plates of capacitors at t = RC is 63.2% 36.8% 30% 20% 23 / 50 [ML-1 T -2] is the dimension of Momentum Force Energy Pressure 24 / 50 The SI unit of plane angle is Candela Degree Steradian Radian 25 / 50 For which position, blood pressure in the body have the smallest value? Sitting on chair Sitting on ground Standing straight Lying horizontally 26 / 50 The emf of two cells can be compared by AVO meter Voltmeter Galvanometer Potentiometer 27 / 50 The resistance between (+) and (-) of ideal Op-Amp is Moderate Low High Infinity 28 / 50 Voltmeter is used to measure: Potential difference Current Temperature Resistance 29 / 50 An example of scalar quantity is Velocity Speed Torque Displacement 30 / 50 The minimum number of unequal forces whose resultant will be zero 3 5 4 2 31 / 50 Tolerance for silver band is: ±20% ±5% ±15% ±10% 32 / 50 One amu is equal to __________ 9.31 MeV 93.1 MeV 0.931 MeV 931 MeV 33 / 50 If the temperature of the sink is decreased, the efficiency of Carnot engine: Remains the same Increases First increases and then decreases Decreases 34 / 50 Which of the following is similar to electron 𝛽 − rays 𝛾 – rays Photons 𝛼 − rays 35 / 50 The internal energy of an ideal gas is directly proportional to: None of these Translational kinetic energy Vibrational kinetic energy Potential energy 36 / 50 The charge on the electron was calculated by: Faraday Millikan J.J. Thomson Einstein 37 / 50 The phase difference between coils of three phase A.C is 120 90 60 45 38 / 50 The dimensions of stain are [ML-2 T] [M -1 L-1 T -1] [MLT 2 ] [M o Lo T o ] 39 / 50 Work done on the body equals to the Change in it K.E and change in its P.E Neither change in K.E nor change in its P.E Change in its P.E always Change in its K.E always 40 / 50 An accurate measurement of emf of a cell is made by A voltmeter An ammeter All of them A potentiometer 41 / 50 The magnitude of dot and cross product of two vectors are 6√3 and 6 respectively. The angle between them will be 45 degree 0° 30 ° 60 ° 42 / 50 The temperature of the core of the reactor rises to about 1200oC 1300oC 1000oC 1100oC 43 / 50 The least distance of distinct vision for a normal eye is: 25 cm 15 cm 30 cm 40 cm 44 / 50 In which process entropy remains constant. Adiabatic Isochoric Isobaric Isothermal 45 / 50 The SI unit of coefficient of viscosity is: 𝑘𝑔 𝑚−1 𝑠−1 𝑘𝑔 𝑚2 𝑠 𝑘𝑔 𝑚−2𝑠−2 𝑘𝑔 𝑚−2 𝑠−1 46 / 50 The Celsius scale starts from: 0°𝐶 373 𝐾 32°𝐹 273 𝐾 47 / 50 Types of quarks are: 6 4 8 10 48 / 50 When motor is at its Max. speed the back e.m.f will be Zero None of these Maximum Cannot tell 49 / 50 In RLC series AC circuit, when XL = XC then impedance is Zero None Maximum Minimum 50 / 50 The property of a system that remains constant during an adiabatic process is called: Entropy Temperature Internal energy Pressure Your score is 0% Restart quiz
