|Solved Physics ECAT Past Papers MCQs|
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ECAT Physics Objective Type Question Answers MCQs Quiz
Engineering Test ECAT Preparations MCQs List With Answers
Q.1: The specially designed semi-conductor diodes used as fast counters in electronic circuits are-------- ?
- The light emitting diodes
- Photo voltaic cell
- Photo diodes
- Solar cells.
Q.2: In forward bias the width of potential barrier-------- ?
- Remains same
- No effect
Q.3: The scales of temperature are based on two fixed points which are--------- ?
- The temperatures of water at 0? 100?C
- The temperatures of ice cold and boiling water
- The temperatures of frozen and boiling mercury
- The temperature of melting ice and boiling water at atmospheric pressure
Q.4: Normal human body temperature 98.6°F corresponds to--------- ?
Q.5: Triple point of water is----------- ?
- 273°C at 6.11 Kpa
- 273K at 61.6 Kpa
- 273.16°C at 0.611 Kpa
- 273.16K at 750 Kpa
Q.6: The direction of a vector in space is specified by---------- ?
- One angle
- Two angle
- Three angle
- No angle
Q.7: Torque is defined as-------- ?
- Turning effect of force
- Cross product of position vector and force
- Product of force and moment arm
- All A, B and C are correct
Q.8: In which quadrant, the only value of tan will be positive ?
- Both 1st and 3rd
Q.9: One AMU is equal to------------ ?
- 1.66 x 10-27kg
- 166 x 10-15ng
- 166 x 10-20g
- All of above
Q.10: The bombardment of nitrogen with alpha particles will produce------ ?
Q.11: A particle having the mass of an electron and the charge of a proton is called a----------- ?
- Gamma rays
Q.12: Nuclei having the same mass number but different atomic number are-------- ?
Q.13: The carburettor of a car is an application of--------- ?
- Venturi meter
- Bernoulli equation
- Both A and B
Q.14: The acceleration of a projection on the diameter for a particle moving along a circle is--------- ?
Q.15: The energy of SHM is maximum at------- ?
- Mean position
- Extreme position
- In between mean and extreme
- All positions during SHM
Q.16: In damped harmonic oscillation which one decreases ?
- Amplitude of vibration
- Energy of vibration
- Both amplitude and energy
- Neither amplitude nor energy
Q.17: The relativistic energy E is equivalent to relativistic mass given by----------- ?
Q.18: As the temperature of black body is raised the wavelength corresponding to maximum intensity--------- ?
- shifts towards longer wavelength
- shifts towards shorter wavelength
- remain the same
- shifts towards longer as well as shorter wavelengths
Q.19: The velocity of a particle of mass m of de-Broglie wavelength λ is---------- ?
- v = 3 ×× 106 ms-1
- v = 2 ×× 10 ms-1
- v = 2 ×× 6 ms-1
- v = 2 ×× 106 ms-1
Q.20: A lens which converges a beam of parallel rays to a point is called--------- ?
- diverging (or concave) lens
- converging (or convex) lens
- plano concave lens
- plano convex lens