MCQOPTIONS
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MCQOPTIONS
This section includes 383 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
Dimensions of permeability are [CBSE PMT 1991; AIIMS 2003] |
| A. | \[{{A}^{-2}}{{M}^{1}}{{L}^{1}}{{T}^{-2}}\] |
| B. | \[ML{{T}^{-2}}\] |
| C. | \[M{{L}^{0}}{{T}^{-1}}\] |
| D. | \[{{A}^{-1}}ML{{T}^{2}}\] |
| Answer» B. \[ML{{T}^{-2}}\] | |
| 352. |
In a certain region of space with volume\[0.2\text{ }{{m}^{3}}\], the electric potential is found to be 5V throughout. The magnitude of electric field in this region is: [NEET 2020] |
| A. | 0.5 N/C |
| B. | 1 N/C |
| C. | 5 N/C |
| D. | zero |
| Answer» E. | |
| 353. |
Two point charges A and B, having charges +Q and Q respectively, are placed at certain distance apart and force acting between them is F. If 25 % charge of A is transferred to B, then force between the charges becomes- [NEET 2019] |
| A. | \[\frac{16F}{9}\] |
| B. | \[\frac{4F}{3}\] |
| C. | F |
| D. | \[\frac{9F}{16}\] |
| Answer» E. | |
| 354. |
Two parallel infinite line charges with linear charge densities +λ C/m and λ C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges? [NEET 2019] |
| A. | \[\frac{\lambda }{\pi {{\in }_{0}}R}N/C\] |
| B. | \[\frac{\lambda }{2\pi {{\in }_{0}}R}N/C\] |
| C. | Zero |
| D. | \[\frac{2\lambda }{\pi {{\in }_{0}}R}N/C\] |
| Answer» C. Zero | |
| 355. |
A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre: [NEET 2019] |
| A. | Zero as r increases for r < R, increases as r increases for r > R |
| B. | Decreases as r increases for r < R and for r > R |
| C. | Increases as r increases for r < R and for r > R |
| D. | Zero as r increases for r < R, decreases as r increases for r > R |
| Answer» E. | |
| 356. |
A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field\[\overrightarrow{\text{E}}\]. Due to the force q\[\overrightarrow{\text{E}}\], its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively [NEET - 2018] |
| A. | 1 m/s, 3.5 m/s |
| B. | 1 m/s, 3 m/s |
| C. | 2 m/s, 4 m/s |
| D. | 1.5 m/s, 3 m/s |
| Answer» C. 2 m/s, 4 m/s | |
| 357. |
A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system [NEET-2017] |
| A. | Increases by a factor of 2 |
| B. | Increases by a factor of 4 |
| C. | Decreases by a factor of 2 |
| D. | Remains the same |
| Answer» D. Remains the same | |
| 358. |
Two identical charged spheres suspended from a common point by two massless strings of lengths \[l,\] are initially at a distance \[d\,(d< |
| A. | \[v\propto {{x}^{\frac{1}{2}}}\] |
| B. | \[v\propto x\] |
| C. | \[v\propto {{x}^{-\frac{1}{2}}}\] |
| D. | \[v\propto {{x}^{-1}}\] |
| Answer» D. \[v\propto {{x}^{-1}}\] | |
| 359. |
A capacitor of \[2\mu F\] is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its stored energy dissipated is: [NEET - 2016] |
| A. | 0 |
| B. | 0.2 |
| C. | 0.75 |
| D. | 0.8 |
| Answer» E. | |
| 360. |
A parallel plate air capacitor has capacity C, distance of separation between plates is d and potential difference V is applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is [NEET (Re) 2015] |
| A. | \[\frac{{{C}^{2}}{{V}^{2}}}{2d}\] |
| B. | \[\frac{C{{V}^{2}}}{2d}\] |
| C. | \[\frac{C{{V}^{2}}}{d}\] |
| D. | \[\frac{{{C}^{2}}{{V}^{2}}}{2{{d}^{2}}}\] |
| Answer» E. | |
| 361. |
If potential (in volts) in a region is expressed as\[V(x,y,z)=6xy-y+2yz,\] the electric field (in N/C) at point \[(1,1,0)\]is [NEET (Re) 2015] |
| A. | \[-(3\hat{i}+5\hat{j}+3\hat{k})\] |
| B. | \[-(6\hat{i}+5\hat{j}+2\hat{k})\] |
| C. | \[-(2\hat{i}+3\hat{j}+\hat{k})\] |
| D. | \[-(6\hat{i}+9\hat{j}+\hat{k})\] |
| Answer» C. \[-(2\hat{i}+3\hat{j}+\hat{k})\] | |
| 362. |
A parallel plate condenser with oil (dielectric constant 2) between the plates has capacitance C. If oil is removed, the capacitance of capacitor becomes: [AIPMT 1999] |
| A. | \[\sqrt{2}\,C\] |
| B. | 2 C |
| C. | \[\frac{C}{\sqrt{2}}\] |
| D. | \[\frac{C}{2}\] |
| Answer» E. | |
| 363. |
The effective capacitance between points x and y of figure shown is: [AIPMT 1999] |
| A. | \[6\,\mu F\] |
| B. | \[12\,\mu F\] |
| C. | \[18\,\mu F\] |
| D. | \[24\,\mu F\] |
| Answer» B. \[12\,\mu F\] | |
| 364. |
In bringing an electron towards another electron, the electrostatic potential energy of the system: [AIPMT 1999] |
| A. | decreases |
| B. | increases |
| C. | remains same |
| D. | becomes zero |
| Answer» C. remains same | |
| 365. |
In a region, the potential is represented by \[V(x,\,y,\,z)=6x-8xy-8y+6yz,\] where V is in volts and x, y, z are in metres. The electric force experienced by a charge of 2 coulomb situated at point \[(1,\text{ }1,\text{ }1)\] is [NEET 2014] |
| A. | \[6\sqrt{5}N\] |
| B. | \[30\,N\] |
| C. | \[24\,N\] |
| D. | \[4\sqrt{35}N\] |
| Answer» E. | |
| 366. |
A, B and C are three points in a uniform electric field. The electric potential is [NEET 2013] |
| A. | maximum at A |
| B. | maximum at B |
| C. | maximum at C |
| D. | same at all the three points A, B and C A |
| Answer» C. maximum at C | |
| 367. |
Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become. [NEET 2013] |
| A. | \[{{\left( \frac{1}{\sqrt{2}} \right)}^{2}}\] |
| B. | \[\left( \frac{r}{\sqrt[3]{2}} \right)\] |
| C. | \[\left( \frac{2r}{\sqrt{3}} \right)\] |
| D. | \[\left( \frac{2r}{3} \right)\] |
| Answer» C. \[\left( \frac{2r}{\sqrt{3}} \right)\] | |
| 368. |
What is the through a cube of side a if a point charge of q is a one of its corner? [AIPMT (S) 2012] |
| A. | \[\frac{2q}{{{\varepsilon }_{0}}}\] |
| B. | \[\frac{q}{8{{\varepsilon }_{0}}}\] |
| C. | \[\frac{q}{{{\varepsilon }_{0}}}\] |
| D. | \[\frac{q}{2{{\varepsilon }_{0}}}6{{a}^{2}}\] |
| Answer» C. \[\frac{q}{{{\varepsilon }_{0}}}\] | |
| 369. |
Four point charges \[-Q,\,-q,\text{ }2q\] and \[2Q\] are placed, one at each comer of the square. The relation between Q and q for which the potential at the centre of the square is zero, is [AIPMT(S) 2012] |
| A. | \[Q=-q\] |
| B. | \[Q=-\frac{1}{q}\] |
| C. | \[Q=q\] |
| D. | \[Q=\frac{1}{q}\] |
| Answer» B. \[Q=-\frac{1}{q}\] | |
| 370. |
Three charges, each \[+q,\] are placed at the comers of an isosceles triangle ABC of sides Be and AC, 2a. D and E are the mid points of Be and CA. The work done in taking a charge Q from D to E is [AIPMT (M) 2011] |
| A. | \[\frac{eqQ}{8\pi {{\varepsilon }_{0}}a}\] |
| B. | \[\frac{qQ}{4\pi {{\varepsilon }_{0}}a}\] |
| C. | zero |
| D. | \[\frac{3qQ}{4\pi {{\varepsilon }_{0}}a}\] |
| Answer» D. \[\frac{3qQ}{4\pi {{\varepsilon }_{0}}a}\] | |
| 371. |
The electric potential V at any point \[(x,y,z),\] all in metres in space is given by \[V=4{{x}^{2}}\] volt. The electric field at the point \[(1,0,2)\] in volt/metre is [AIPMT (M) 2011] |
| A. | 8 along positive .X-axis |
| B. | 16 along negative X-axis |
| C. | 16 along positive X-axis |
| D. | 8 along negative X-axis |
| Answer» E. | |
| 372. |
The electric field at a distance \[\frac{3R}{2}\] from the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance \[\frac{R}{2}\] from the centre of the sphere is [AIPMT (M) 2010] |
| A. | zero |
| B. | E |
| C. | \[\frac{E}{2}\] |
| D. | \[\frac{E}{3}\] |
| Answer» B. E | |
| 373. |
Two parallel metal plates having charges \[+Q\] and \[-Q\] face each other at a certain distance between them. If the plates are now dipped in kerosene oil tank, the electric field between the plates will [AIPMT (M) 2010] |
| A. | become zero |
| B. | increase |
| C. | decrease |
| D. | remain same |
| Answer» D. remain same | |
| 374. |
A series combination of n1 capacitors, each of value \[{{C}_{1}},\] is charged by a source of potential difference 4V. When another parallel combination of \[{{n}_{2}}\] capacitors, each of value \[{{C}_{2}},\] is charged by a source of potential difference V, it has the same (total) energy stored in it, as the first combination has. The value of \[{{C}_{2}},\] in terms of \[{{C}_{1}},\] is then [AIPMT (S) 2010] |
| A. | \[\frac{2{{C}_{1}}}{{{n}_{1}}\,{{n}_{2}}}\] |
| B. | \[16\frac{{{n}_{2}}}{{{n}_{1}}\,}{{C}_{1}}\] |
| C. | \[2\frac{{{n}_{2}}}{{{n}_{1}}\,}{{C}_{1}}\] |
| D. | \[\frac{16{{C}_{1}}}{{{n}_{1}}\,{{n}_{2}}\,}\] |
| Answer» E. | |
| 375. |
When air is replaced by a dielectric medium of constant K, the maximum force of attraction between two charges, separated by a distance: [AIPMT 1999] |
| A. | decreases K times |
| B. | increase K times |
| C. | remains unchanged |
| D. | becomes \[\frac{1}{{{K}^{2}}}\]times |
| Answer» B. increase K times | |
| 376. |
A hollow insulated conducting sphere is given a positive charge of \[10\,\mu C\]. What will be the electric field at the centre of the sphere if its radius is 2 m? [AIPMT 1998] |
| A. | Zero |
| B. | \[5\,\mu \,C{{m}^{-2}}\] |
| C. | \[20\,\mu \,C{{m}^{-2}}\] |
| D. | \[8\,\mu \,C{{m}^{-2}}\] |
| Answer» B. \[5\,\mu \,C{{m}^{-2}}\] | |
| 377. |
A particle of mass m and charge q is placed at rest in a uniform electric field E and then released. The kinetic energy attained by the particle after moving a distance y is : [AIPMT 1998] |
| A. | \[qE{{y}^{2}}\] |
| B. | \[q{{E}^{2}}y\] |
| C. | \[qEy\] |
| D. | \[{{q}^{2}}Ey\] |
| Answer» D. \[{{q}^{2}}Ey\] | |
| 378. |
A point Q lies on die perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole) then electric field at Q is proportional to: [AIPMT 1998] |
| A. | \[{{p}^{-1}}\] and \[{{r}^{2}}\] |
| B. | \[p\] and \[{{r}^{-2}}\] |
| C. | \[{{p}^{2}}\] and \[{{r}^{-3}}\] |
| D. | \[p\] and \[{{r}^{-3}}\] |
| Answer» E. | |
| 379. |
A man goes at the top of a smooth inclined plane. He releases a bag to fall freely and he himself slides on inclined plane to reach the bottom. If \[{{v}_{1}}\] and \[{{v}_{2}}\] are the velocities of the man and bag respectively, then: [AIPMT 2000] |
| A. | \[{{v}_{1}}>{{v}_{2}}\] |
| B. | \[{{v}_{1}}<{{v}_{2}}\] |
| C. | \[{{v}_{1}}={{v}_{2}}\] |
| D. | \[{{v}_{1}}\] and \[{{v}_{2}}\] cannot be compared |
| Answer» D. \[{{v}_{1}}\] and \[{{v}_{2}}\] cannot be compared | |
| 380. |
The reactance of a capacitor of capacitance C is X. If both the frequency and capacitance be doubled, then new reactance will be: [AIPMT 2001] |
| A. | X |
| B. | 2X |
| C. | 4X |
| D. | \[\frac{X}{4}\] |
| Answer» E. | |
| 381. |
A capacitor is charged by connecting a battery across its plates. It stores energy U. Now the battery is disconnected and another identical capacitor is connected across it, then the energy stored by both capacitors of the system will be: [AIPMT 2000] |
| A. | U |
| B. | \[\frac{U}{2}\] |
| C. | 2U |
| D. | \[\frac{3}{2}U\] |
| Answer» C. 2U | |
| 382. |
A charged wire is bent in the form of a semi-circular arc of radius a. If charge per unit length is \[\lambda \] coulomb/metre, the electric field at the centre O is: |
| A. | \[\frac{\lambda }{2\pi {{a}^{2}}{{\varepsilon }_{0}}}\] |
| B. | \[\frac{\lambda }{4{{\pi }^{2}}{{\varepsilon }_{0}}a}\] |
| C. | \[\frac{\lambda }{2{{\pi }^{2}}{{\varepsilon }_{0}}a}\] |
| D. | zero |
| Answer» D. zero | |
| 383. |
When a proton is accelerated through 1V its kinetic energy will be: [AIPMT 1999] |
| A. | 1540 eV |
| B. | 13.6 eV |
| C. | 1 eV |
| D. | zero |
| Answer» D. zero | |