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