Select Chapter Topics:
Q. No.\(150\) cc of water taken in an electric kettle boils in \(20\) minutes. If the same amount of water is to be boiled in \(10\) minutes, the length of the heating element will have to be:
1.
one fourth
2.
one third
3.
two times
4.
one half
Subtopic: Â Heating Effects of Current |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The potential difference \(V_{AB}\) (in volts) is plotted as a function of the resistance \(R.\) The graph is given by:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Â Derivation of Ohm's Law |
 52%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Current density is the current crossing per unit area. Consider a cylindrical wire of uniform cross-section \(A,\) carrying a current \(I.\) Imagine a cross-section formed by a "\(30^\circ\)-cut" as shown (the wire is not really cut). The current density perpendicular to this cross-section is:
| 1. | \(\dfrac{I}{A}\) | 2. | \(\dfrac{I}{A}~\cos30^\circ\) |
| 3. | \(\dfrac{2I}{A}\) | 4. | \(\dfrac{I}{A}~\sin30^\circ\) |
Subtopic: Â Current & Current Density |
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
A thin circular conducting wire is connected at \(A,B\) where the smaller arc \(AB\) represents \(\dfrac14^{\text{th}}\) of the circumference. A current flows from \(A\) to \(B,\) dividing into two branches \(i_1\) and \(i_2\) at \(A.\) The ratio \(i_1:i_2\) equals:
| 1. | \(3\) | 2. | \(4\) |
| 3. | \(\dfrac13\) | 4. | \(1\) |
Subtopic: Â Combination of Resistors |
 56%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Nine similar resistors of resistance \(R\) are connected as shown in the figure. Equivalent resistance between points A and B is:
1. \(\frac{3}{5} R\)
2. \(\frac{4}{3} R\)
3. \(\frac{9}{5} R\)
4. \(R\)
1. \(\frac{3}{5} R\)
2. \(\frac{4}{3} R\)
3. \(\frac{9}{5} R\)
4. \(R\)
Subtopic: Â Combination of Resistors |
 53%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The resistance between \(A,B\) is found to be \(500~\Omega\) while that between \(A,C\) is \(400~\Omega.\) The minimum possible value of \(R_2\) is:
1. \(100~\Omega\)
2. \(200~\Omega\)
3. \(400~\Omega\)
4. \(900~\Omega\)
1. \(100~\Omega\)
2. \(200~\Omega\)
3. \(400~\Omega\)
4. \(900~\Omega\)
Subtopic: Â Kirchoff's Voltage Law |
 54%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
The current flowing through the resistance \(R_1\), when \(R_1=R_2\) and \(R_3=R_4\) is:
| 1. | \(\frac{V}{4\left(R_1+R_3\right)}\) | 2. | \(\frac{2 V}{\left(R_1+R_3\right)}\) |
| 3. | \(\frac{V}{\left(R_1+R_3\right)}\) | 4. | \(\frac{V}{2\left(R_1+R_3\right)}\) |
Subtopic: Â Current & Current Density |
 51%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
All the cells, shown in the figure below, are of \(2~\text V,\) and all the resistances are \(1~\Omega.\) When a potential difference \(V\) is applied between \(A\) and \(B,\) the current through the circuit doubles compared to the situation when the potential difference is made zero. Then;
| 1. | \(V=2\) volts, positive at \(A.\) |
| 2. | \(V=2\) volts, negative at \(A.\) |
| 3. | \(V=6\) volts, positive at \(A.\) |
| 4. | \(V=6\) volts, negative at \(A.\) |
Subtopic: Â Kirchoff's Voltage Law |
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
\(n\) identical cells, each with an EMF \(E\) and internal resistance \(r,\) are connected in series to form a closed circuit. One of the cells, \(A,\) is connected with its polarity reversed. What is the potential difference across each cell (excluding cell \(A\))?
| 1. | \(\dfrac{2E}{n}\) | 2. | \(\dfrac{E}{n}\) |
| 3. | \(\left(\dfrac{n-2}{n}\right)E\) | 4. | \(\left(\dfrac{2n}{n-2}\right)E\) |
Subtopic: Â Grouping of Cells |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Two wires A and B of equal lengths and of same metal are taken. The diameter of wire A is half to that of wire B. If the resistance of wire A is 48 \(\Omega\), then resistance of wire B is:
1. 96 \(\Omega\)
2. 192 \(\Omega\)
3. 24 \(\Omega\)
4. 12 \(\Omega\)
1. 96 \(\Omega\)
2. 192 \(\Omega\)
3. 24 \(\Omega\)
4. 12 \(\Omega\)
Subtopic: Â Derivation of Ohm's Law |
 60%
From NCERT
Please attempt this question first.
Hints
Select Chapter Topics:
© 2025 GoodEd Technologies Pvt. Ltd.