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