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