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