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