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