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