modern and space physics, sources of energy - Category wise Question and Answer Practice Test with Solutions

Question : 11 [NDA]

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

Question : 12 [NDA ]

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

Question : 13

The active component in an IC are

a) Capacitors

b) Transistors and diodes

c) Resistors

d) None of these

Question : 14

Einstein’s photoelectric equation states that hν = $W_0 + E_k$ in this equation, $E_k$ refers to the

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

Question : 15

________ is used as a fuel in space ships.

a) Alcohol

b) Petrol

c) Hydrogen

d) Diesel