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 When motor is at its Max. speed the backĀ e.m.f will be Cannot tell Maximum None of these Zero 2 / 50 The temperature of the core of the reactor rises to about 1300oC 1200oC 1100oC 1000oC 3 / 50 The oscillations in which amplitude decreased steadily with time are called: Damped oscillations Free oscillation Forced oscillations Natural oscillations 4 / 50 One amu is equal to __________ 931 MeV 93.1 MeV 0.931 MeV 9.31 MeV 5 / 50 Which of the following is similar to electron š¼ ā rays š¾ ā rays Photons š½ ā rays 6 / 50 The resistance between (+) and (-) of ideal Op-Amp is High Moderate Low Infinity 7 / 50 The minimum number of unequal forces whose resultant will be zero 5 2 4 3 8 / 50 The charges on the quarks are Half unit None of these Fraction One unit 9 / 50 The constant K in Coulombās Law depends upon Both a & b System of units Intensity of charge Nature of medium 10 / 50 If a body of mass 10 kg is allowed to fall freely, its weight becomes. 9.8N 10N zero 98N 11 / 50 Heat is the form of: Power Work Motion Energy 12 / 50 In which process entropy remains constant. Adiabatic Isothermal Isobaric Isochoric 13 / 50 Which of the following is not present in AC generator: Commutator Armature Slip rings Magnet 14 / 50 Pull of earth on a mass of 20 kg on the surface of the earth is 196 N 20 N 19.6 N 1960 N 15 / 50 Photon āAā has twice the energy of photon āBā. What is the ratio of the momentum of āAā to that of āBā? 4 : 1 None 2 : 1 1 : 2 16 / 50 Slope of velocity time graph is Acceleration Momentum Distance Force 17 / 50 The property of a system that remains constant during an adiabatic process is called: Temperature Pressure Internal energy Entropy 18 / 50 For which position, blood pressure in the body have the smallest value? Sitting on ground Sitting on chair Standing straight Lying horizontally 19 / 50 Tolerance for silver band is: Ā±10% Ā±20% Ā±15% Ā±5% 20 / 50 If the temperature of the sink is decreased, the efficiency of Carnot engine: Increases Decreases First increases and then decreases Remains the same 21 / 50 The magnitude of dot and cross product of two vectors are 6ā3 and 6 respectively. The angle between them will be 45 degree 60 Ā° 30 Ā° 0Ā° 22 / 50 The dimensions of stain are [MLT 2 ] [M o Lo T o ] [M -1 L-1 T -1] [ML-2 T] 23 / 50 The SI unit of plane angle is Steradian Degree Radian Candela 24 / 50 The internal energy of an ideal gas is directly proportional to: Vibrational kinetic energy Potential energy Translational kinetic energy None of these 25 / 50 The SI unit of coefficient of viscosity is: šš šā2š ā2 šš šā2 š ā1 šš š2 š šš šā1 š ā1 26 / 50 Lenzās law is in accordance with the law of conservation of: Momentum Charge Energy Angular momentum 27 / 50 How many times per second will an incandescent lamp reach maximum brilliance when connected to a 50Hz source? 50 times 100 times 200 times None of these 28 / 50 In RLC series AC circuit, when XL = XC then impedance is Maximum None Zero Minimum 29 / 50 Types of quarks are: 10 8 4 6 30 / 50 The frequency of waves produced in microwaves oven is: 2850 MHz 1435 MHz 1860 MHz 2450 MHz 31 / 50 Distance covered during one vibration of an oscillating body in term of amplitude A is: š“ 2š“ 4š“ š“ /2 32 / 50 An accurate measurement of emf of a cell is made by An ammeter A potentiometer All of them A voltmeter 33 / 50 The Celsius scale starts from: 373 š¾ 0Ā°š¶ 32Ā°š¹ 273 š¾ 34 / 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 Neither change in K.E nor change in its P.E Change in its P.E always 35 / 50 [ML-1 T -2] is the dimension of Energy Pressure Momentum Force 36 / 50 Which of the following is least multiple: Nano Femto Pico Atto 37 / 50 The idea of quantization of energy wasĀ proposed by Einstein Compton None of these Max Planck 38 / 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 25% 15% 50% 7.5% 39 / 50 The phase difference between coils of three phase A.C is 120 90 45 60 40 / 50 During charging of a capacitor, the ratio of instantaneous charge and maximum charge on plates of capacitors at t = RC is 36.8% 30% 20% 63.2% 41 / 50 The least distance of distinct vision for a normalĀ eye is: 15 cm 30 cm 25 cm 40 cm 42 / 50 Voltmeter is used to measure: Potential difference Resistance Temperature Current 43 / 50 LASER light has the property of: Coherent waves Water waves Sound waves Non-coherent waves 44 / 50 An example of scalar quantity is Torque Speed Displacement Velocity 45 / 50 The charge on the electron was calculated by: J.J. Thomson Einstein Faraday Millikan 46 / 50 During projectile motion, the horizontal component of velocity: Changes with time Becomes zero Remains constant Increases with time 47 / 50 Doppler Effect applies to Light wave only Both sound and light wave Sound wave only Neither sound nor light wave 48 / 50 Boyleās law holds for ideal gases in Isobaric processes Isothermal processes Isochoric processes Adiabatic processes 49 / 50 The emf of two cells can be compared by Potentiometer Voltmeter Galvanometer AVO meter 50 / 50 The critical temperature for mercury is: 7.2 K 3.7 K 4.2 K 1.18 K Your score is 0% Restart quiz
