set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on modern and space physics, sources of energy topic of general science mcq
(a) Mean kinetic energy of the emitted electrons
(b) Maximum kinetic energy of the emitted electrons
(c) Kinetic energy of all the emitted electrons
(d) Minimum kinetic energy of the emitted electrons
The correct answers to the above question in:
Answer: (b)
In the given relation Ek stands for maximum K.E. of emitted photoelectron.
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Question : 1
________ is used as a fuel in space ships.
a) Alcohol
b) Petrol
c) Hydrogen
d) Diesel
Answer »Answer: (c)
Question : 2
Sun emits energy in the form of electromagnetic radiation. The following help in the generation of solar energy. Arrange them in the right sequence beginning from the starting of the cycle :
- Hydrogen is converted to helium at very high temperatures and pressures.
- The energy finds its way to sun's surface.
- A vast quantity of energy is generated by nuclear fusion.
a) 2-3-1
b) 3-2-1
c) 1-2-3
d) 1-3-2
Answer »Answer: (d)
Question : 3
An AM broadcasting station has a vertical telescopic transmitting antenna and a receiver has a vertical telescopic antenna. The receiver will respond to:
a) Magnetic component of the electromagnetic wave produced by antenna
b) Both electric and magnetic components of the electromagnetic wave produced by antenna
c) Electric component of the electromagnetic wave produced by antenna
d) 50% of both components of the electromagnetic wave produced by antenna
Answer »Answer: (c)
An AM broadcasting station has a vertical telescopic transmitting antenna and a receiver has a vertical telescopic antenna.
The receiver will respond to electric component of the electromagnetic wave produced by antenna.
Question : 4
The active component in an IC are
a) Capacitors
b) Transistors and diodes
c) Resistors
d) None of these
Answer »Answer: (b)
Question : 5
Which one of the following is correct? The wavelength of the X-rays
a) is longer than the wavelength of the yellow sodium light
b) is longer than the wavelength of radio waves
c) is longer than the wavelength of sound waves
d) is of the order of 0.1 nanometer
Answer »Answer: (d)
Question : 6
The neutron, proton, electron and alpha particle are moving with equal kinetic energies. How can the particles be arranged in the increaseing order of their velocities?
a) proton-electron-neutron-alpha paraticle
b) electron-proton-neutron-alpha paraticle
c) alpha particle-neutron-proton- electron
d) neutron-proton-electron-alpha paraticle
Answer »Answer: (c)
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