MCQ
$1$ atomic mass unit is equal to
- A$\frac{1}{25} \ll$ (mass of $\mathrm{F}_2$ molecules$)$
- B$\frac{1}{14}$ (mass of $\mathrm{N}_2$ molecules$)$
- ✓$\frac{1}{12} ($mass of one $C-$atom$)$
- D$\frac{1}{16} ($mass of $\mathrm{O}_2$ molecules$)$
✓
Answer
Correct option: C.
$\frac{1}{12} ($mass of one $C-$atom$)$
$\frac{1}{12} ($mass of one $C-$atom$)$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A vertical straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is(a) Greater than at Q(b) Same as at Q(c) Less than at Q(d) Greater or less than at Q depending upon the strength of the current
While a capacitor remains connected to a battery and dielectric slab is applied between the plates, then(a) Potential difference between the plates is changed(b) Charge flows from the battery to the capacitor(c) Electric field between the plates increases(d) Energy store in the capacitor decreases
The capacitor of capacitance 4μF and 6 μF are connected in series. A potential difference of 500 volts applied to the outer plates of the two capacitor system. Then the charge on each capacitor is numerically(a) 6000 C(b) 1200 C(c) 1200 μC(d) 6000 μC
If the corrent constant for a transistor are $ \alpha $ & $ \beta $, then :
→The force which a magnet exerts on iron and steel is called the:
The work done in placing a charge of $8 \times 10^{-18}$ coulomb on a condenser of capacity $100$ micro$-$farad is
→Which of the following is true?
Assertion : The electrical conductivity of earth’s atmosphere decrease with altitude.
Reason : The high energy particles (i.e. g-rays and cosmic rays) coming from outer space and entering our earth’s atmosphere causes ionisation of the atoms of the gases present there and the pressure of gases decreases with increase in altitude.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If assertion is false but reason is true.
Reason : The high energy particles (i.e. g-rays and cosmic rays) coming from outer space and entering our earth’s atmosphere causes ionisation of the atoms of the gases present there and the pressure of gases decreases with increase in altitude.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If assertion is false but reason is true.
In the adjoining figure, four capacitors are shown with their respective capacities and the $P.D.$ applied. The charge and the $P.D.$ across the $4\ \mu F$ capacitor will be
→Doppler's effect in sound in addition to relative velocity between source and observer, also depends while source and observer or both are moving. Doppler effect in light depend only on the relative velocity of source and observer. The reason of this is(a) Einstein mass - energy relation(b) Einstein theory of relativity(c) Photoelectric effect(d) None of these