- AAtomic mass
- BMolecular mass
- CAtomic number
- DNone of the above
Explanation:
The mass of an atom expressed in amu is known as atomic mass. atomic mass unit defined as a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12.
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A man is 180 cm tall and his eyes are 10 cm below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of 1m from him. The minimum length of the plane mirror required is
| (a) 180 cm | (b) 90 cm | (c) 85 cm | (d) 170 cm |
In a double slit experiment, instead of taking slits of equal widths, one slit is made twice as wide as the other. Then in the interference pattern
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(a) The intensities of both the maxima and the minima increase |
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(b) The intensity of maxima increases and the minima has zero intensity |
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(c) The intensity of maxima decreases and that of the minima increases |
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(d) The intensity of maxima decreases and the minima has zero intensity |
$\vec{\text{r}}.\vec{\text{F}}=0$ and $\vec{\text{F}}.\vec{\tau}=0$
$\vec{\text{r}}.\vec{\tau}=0$ but $\vec{\text{F}}.\vec{\tau}\neq0$
$\vec{\text{r}}.\vec{\tau}\neq0$ but $\vec{\text{F}}.\vec{\tau}=0$
$\vec{\text{r}}.\vec{\tau}\neq0$ and $\vec{\text{F}}.\vec{\tau}\neq0$
Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between
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(a) P and Q |
(b) Q and R |
(c) P and R |
(d) Any two points |