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