NEET Test Series from KOTA - 10 Papers In MS WORD
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Electric Charges and Fields
272164
A liquid drop having 6 excess electrons is kept stationary under a uniform electric field of $25.5KV{{m}^{-1}}$. The density of liquid is $1.26\times {{10}^{3}}~kg~{{m}^{-3}}$. The radius of the drop is (neglect buoyany)
1 $4.3\times {{10}^{-7}}~m$
2 $7.3\times {{10}^{-7}}~m$
3 $0.078\times {{10}^{-7}}~m$
4 $3.4\times {{10}^{-7}}~m$
Explanation:
(b) $F=qE=mg\left( q=6e=6\times 1.6\times {{10}^{-19}} \right)$
Density (d).
$\frac{~mass~}{~volume~}=\frac{m}{\frac{4}{3}\pi {{r}^{3}}}$ or ${{r}^{3}}=\frac{m}{\frac{4}{3}\pi d}$
Putting the value of $v$ and $m\left( =2E/g \right)$ and solving we get $r=7.8\times {{10}^{-7}}~m$
NCERT Page-18 / N-14
Electric Charges and Fields
272165
Electric lines of force about a negative point charge are
1 circular anticlockwise
2 circular clockwise
3 radial, inwards
4 radial, outwards
Explanation:
(c)
NCERT Page-23 / N-20
Electric Charges and Fields
272166
Electric lines of force
1 exist everywhere
2 exist only in the immediate vicinity of electric charges
3 exist only when both positive and negative charges are near one another
4 are imaginary
Explanation:
(d)
NCERT Page-23 / N-20
Electric Charges and Fields
272167
Figure shows some of the electric field lines corresponding to an electric field.
The figure suggests that
272164
A liquid drop having 6 excess electrons is kept stationary under a uniform electric field of $25.5KV{{m}^{-1}}$. The density of liquid is $1.26\times {{10}^{3}}~kg~{{m}^{-3}}$. The radius of the drop is (neglect buoyany)
1 $4.3\times {{10}^{-7}}~m$
2 $7.3\times {{10}^{-7}}~m$
3 $0.078\times {{10}^{-7}}~m$
4 $3.4\times {{10}^{-7}}~m$
Explanation:
(b) $F=qE=mg\left( q=6e=6\times 1.6\times {{10}^{-19}} \right)$
Density (d).
$\frac{~mass~}{~volume~}=\frac{m}{\frac{4}{3}\pi {{r}^{3}}}$ or ${{r}^{3}}=\frac{m}{\frac{4}{3}\pi d}$
Putting the value of $v$ and $m\left( =2E/g \right)$ and solving we get $r=7.8\times {{10}^{-7}}~m$
NCERT Page-18 / N-14
Electric Charges and Fields
272165
Electric lines of force about a negative point charge are
1 circular anticlockwise
2 circular clockwise
3 radial, inwards
4 radial, outwards
Explanation:
(c)
NCERT Page-23 / N-20
Electric Charges and Fields
272166
Electric lines of force
1 exist everywhere
2 exist only in the immediate vicinity of electric charges
3 exist only when both positive and negative charges are near one another
4 are imaginary
Explanation:
(d)
NCERT Page-23 / N-20
Electric Charges and Fields
272167
Figure shows some of the electric field lines corresponding to an electric field.
The figure suggests that
272164
A liquid drop having 6 excess electrons is kept stationary under a uniform electric field of $25.5KV{{m}^{-1}}$. The density of liquid is $1.26\times {{10}^{3}}~kg~{{m}^{-3}}$. The radius of the drop is (neglect buoyany)
1 $4.3\times {{10}^{-7}}~m$
2 $7.3\times {{10}^{-7}}~m$
3 $0.078\times {{10}^{-7}}~m$
4 $3.4\times {{10}^{-7}}~m$
Explanation:
(b) $F=qE=mg\left( q=6e=6\times 1.6\times {{10}^{-19}} \right)$
Density (d).
$\frac{~mass~}{~volume~}=\frac{m}{\frac{4}{3}\pi {{r}^{3}}}$ or ${{r}^{3}}=\frac{m}{\frac{4}{3}\pi d}$
Putting the value of $v$ and $m\left( =2E/g \right)$ and solving we get $r=7.8\times {{10}^{-7}}~m$
NCERT Page-18 / N-14
Electric Charges and Fields
272165
Electric lines of force about a negative point charge are
1 circular anticlockwise
2 circular clockwise
3 radial, inwards
4 radial, outwards
Explanation:
(c)
NCERT Page-23 / N-20
Electric Charges and Fields
272166
Electric lines of force
1 exist everywhere
2 exist only in the immediate vicinity of electric charges
3 exist only when both positive and negative charges are near one another
4 are imaginary
Explanation:
(d)
NCERT Page-23 / N-20
Electric Charges and Fields
272167
Figure shows some of the electric field lines corresponding to an electric field.
The figure suggests that
272164
A liquid drop having 6 excess electrons is kept stationary under a uniform electric field of $25.5KV{{m}^{-1}}$. The density of liquid is $1.26\times {{10}^{3}}~kg~{{m}^{-3}}$. The radius of the drop is (neglect buoyany)
1 $4.3\times {{10}^{-7}}~m$
2 $7.3\times {{10}^{-7}}~m$
3 $0.078\times {{10}^{-7}}~m$
4 $3.4\times {{10}^{-7}}~m$
Explanation:
(b) $F=qE=mg\left( q=6e=6\times 1.6\times {{10}^{-19}} \right)$
Density (d).
$\frac{~mass~}{~volume~}=\frac{m}{\frac{4}{3}\pi {{r}^{3}}}$ or ${{r}^{3}}=\frac{m}{\frac{4}{3}\pi d}$
Putting the value of $v$ and $m\left( =2E/g \right)$ and solving we get $r=7.8\times {{10}^{-7}}~m$
NCERT Page-18 / N-14
Electric Charges and Fields
272165
Electric lines of force about a negative point charge are
1 circular anticlockwise
2 circular clockwise
3 radial, inwards
4 radial, outwards
Explanation:
(c)
NCERT Page-23 / N-20
Electric Charges and Fields
272166
Electric lines of force
1 exist everywhere
2 exist only in the immediate vicinity of electric charges
3 exist only when both positive and negative charges are near one another
4 are imaginary
Explanation:
(d)
NCERT Page-23 / N-20
Electric Charges and Fields
272167
Figure shows some of the electric field lines corresponding to an electric field.
The figure suggests that
