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