ECAT MCQs Physics Past Papers Quiz Test

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Engineering Test ECAT Preparations MCQs List With Answers

Q.1: The specially designed semi-conductor diodes used as fast counters in electronic circuits are-------- ?

1. The light emitting diodes
2. Photo voltaic cell
3. Photo diodes
4. Solar cells.

C

Q.2: In forward bias the width of potential barrier-------- ?

1. Increases
2. Decreases
3. Remains same
4. No effect

B

Q.3: The scales of temperature are based on two fixed points which are--------- ?

1. The temperatures of water at 0? 100?C
2. The temperatures of ice cold and boiling water
3. The temperatures of frozen and boiling mercury
4. The temperature of melting ice and boiling water at atmospheric pressure

D

Q.4: Normal human body temperature 98.6°F corresponds to--------- ?

1. 37°C
2. 42°C
3. 55°C
4. 410°C

A

Q.5: Triple point of water is----------- ?

1. 273°C at 6.11 Kpa
2. 273K at 61.6 Kpa
3. 273.16°C at 0.611 Kpa
4. 273.16K at 750 Kpa

C

Q.6: The direction of a vector in space is specified by---------- ?

1. One angle
2. Two angle
3. Three angle
4. No angle

C

Q.7: Torque is defined as-------- ?

1. Turning effect of force
2. Cross product of position vector and force
3. Product of force and moment arm
4. All A, B and C are correct

D

Q.8: In which quadrant, the only value of tan will be positive ?

1. First
2. Second
3. Third
4. Both 1st and 3rd

D

Q.9: One AMU is equal to------------ ?

1. 1.66 x 10-27kg
2. 166 x 10-15ng
3. 166 x 10-20g
4. All of above

D

Q.10: The bombardment of nitrogen with alpha particles will produce------ ?

1. Proton
2. Neutron
3. Electron
4. Positron

A

Q.11: A particle having the mass of an electron and the charge of a proton is called a----------- ?

1. Antiproton
2. Positron
3. Gamma rays
4. Photon

B

Q.12: Nuclei having the same mass number but different atomic number are-------- ?

1. Isotopes
2. Isobars
3. Isotones
4. Isomers

B

Q.13: The carburettor of a car is an application of--------- ?

1. Venturi meter
2. Bernoulli equation
3. Both A and B
4. None

C

Q.14: The acceleration of a projection on the diameter for a particle moving along a circle is--------- ?

1. w2x
2. wx2
3. w2x
4. wx2

C

Q.15: The energy of SHM is maximum at------- ?

1. Mean position
2. Extreme position
3. In between mean and extreme
4. All positions during SHM

D

Q.16: In damped harmonic oscillation which one decreases ?

1. Amplitude of vibration
2. Energy of vibration
3. Both amplitude and energy
4. Neither amplitude nor energy

B

Q.17: The relativistic energy E is equivalent to relativistic mass given by----------- ?

1. Ec2
2. E/c
3. E/c2
4. c2/E

C

Q.18: As the temperature of black body is raised the wavelength corresponding to maximum intensity--------- ?

1. shifts towards longer wavelength
2. shifts towards shorter wavelength
3. remain the same
4. shifts towards longer as well as shorter wavelengths

B

Q.19: The velocity of a particle of mass m of de-Broglie wavelength λ is---------- ?

1. v = 3 ×× 106 ms-1
2. v = 2 ×× 10 ms-1
3. v = 2 ×× 6 ms-1
4. v = 2 ×× 106 ms-1

D

Q.20: A lens which converges a beam of parallel rays to a point is called--------- ?

1. diverging (or concave) lens
2. converging (or convex) lens
3. plano concave lens
4. plano convex lens

B