# Physics - One Mark Question - HSC - Set 3

10  +2 one mark questions in Physics compiled from a random pool of Physics questions. Post your answers to these questions and know your score. Make sure you follow our blog for more sample questions like this.

Question Set 3

1) The de Broglie wave length of a proton moving with $\frac{1}{15}^{th}$ the velocity of light is:

a) $3\times \;10^{-14} \; m$
b) $2\times \;10^{-15} \; m$
c) $2\times \;10^{-14} \; m$
d) $3\times \;10^{-16} \; m$

2) The average energy released per fission is:

a) 200 eV
b) 200 MeV
c) 200 V
d) 50000 V

3) The rest mass of proton is equal to …………. times the rest mass of an electron.

a) 836
b) 1836.1
c) 1386.1
d) 1863.1

4) If 175 gm in 200 gm of a radioactive element decays in 3 hours, its half life period is

a) 1.5 hours
b) 1 hour
c) 3 hours
d) 3/4 hours

5) The energy of primary cosmic ray is

a) $10^{8} \; eV$
b) $10^{9} \; eV$
c) $10^{6} \; eV$
d) $10^{7} \; eV$

6) The condition for oscillator is

a) $A\beta=0$
b) $A\beta=\infty$
c) $A+\beta=1$
d) $A=\frac{1}{\beta}$

7) The width of the BASE regions of a transistor is

a) 25 mm
b) 25 microns
c) 25 cm
d) 25 m

8) In a CE mode transistor, the emitter current is 10 mA and the base current is $500 \mu A$. The current gain is

a) 0.95
b) 0.98
c) 19
d) 20

9) In television the blanking pulse is applied to

a) horizontal plates
b) vertical plates
c) central grid
d) filament

10) The principle used for transmission of light signals through optical fibre is

a) reflection
b) total internal reflection
c) refraction
d) diffraction