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