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