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Q. No.
Subtopic: Wheatstone Bridge |
From NCERT
NEET - 2024
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The equivalent resistance \(R_{AB}\) between points \(A\) and \(B\) in the given network is:
1. \(1R\)
2. \({\large\frac35}R\)
3. \({\large\frac78}R\)
4. \({\large\frac58}R\)
1. \(1R\)
2. \({\large\frac35}R\)
3. \({\large\frac78}R\)
4. \({\large\frac58}R\)
Subtopic: Combination of Resistors |
73%
From NCERT
NEET - 2024
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The value of \(R\) in the given circuit when there is no current in the \(5 \Omega\) resistor is:
1. \(12~\Omega\)
2. \(9~ \Omega\)
3. \(3~ \Omega\)
4. \(2~ \Omega\)
1. \(12~\Omega\)
2. \(9~ \Omega\)
3. \(3~ \Omega\)
4. \(2~ \Omega\)
Subtopic: Wheatstone Bridge |
79%
From NCERT
NEET - 2024
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There are two heaters \(A\) and \(B.\) Heater \(A\) takes time \(t_1\) to boil a given quantity of water, while \(B\) takes time \(t_2\) to boil the same quantity of water across same supply voltage. If the two heaters are connected in series, time taken by this combination to boil the same quantity of water will be:
1. \(\large\frac{t_1t_2}{t_1+t_2}\)
2. \(t_1+t_2\)
3. \({\large\frac12}(t_1+t_2)\)
4. \(\large\frac{t_1t_2}{2(t_1+t_2)}\)
1. \(\large\frac{t_1t_2}{t_1+t_2}\)
2. \(t_1+t_2\)
3. \({\large\frac12}(t_1+t_2)\)
4. \(\large\frac{t_1t_2}{2(t_1+t_2)}\)
Subtopic: Heating Effects of Current |
55%
From NCERT
NEET - 2024
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Arrange the following in the order of their resistance.
Choose the correct answer from the options given below:
1. A > B > C > D
2. D > C > B > A
3. D > A > B > C
4. C > B > A > D
| A. | (\(0\) to \(1~\text A\)) ranged ammeter. |
| B. | (\(0\) to \(100~\text {mA}\)) ranged milli-ammeter. |
| C. | (\(0\) to \(500~\mu\text A\)) ranged micro-ammeter. |
| D. | (\(0\) to \(100~\text V\)) ranged voltmeter. |
1. A > B > C > D
2. D > C > B > A
3. D > A > B > C
4. C > B > A > D
Subtopic: Derivation of Ohm's Law |
56%
From NCERT
NEET - 2024
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Two heaters \(\mathrm{A}\) and \(\mathrm{B}\) have power rating of \(1~\text{kW}\) and \(2~\text{kW}\), respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is:
1. \(2:9\)
2. \(1:2\)
3. \(2:3\)
4. \(1:1\)
1. \(2:9\)
2. \(1:2\)
3. \(2:3\)
4. \(1:1\)
Subtopic: Heating Effects of Current |
58%
From NCERT
NEET - 2024
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A wire of length \('l'\) and resistance \(100 ~\Omega\) is divided into \(10\) equal parts. The first \(5\) parts are connected in series while the next \(5\) parts are connected in parallel. The two combinations are again connected in series. The resistance of this final combination is:
1. \(52~ \Omega\)
2. \(55~ \Omega\)
3. \(60 ~\Omega\)
4. \(26~ \Omega\)
1. \(52~ \Omega\)
2. \(55~ \Omega\)
3. \(60 ~\Omega\)
4. \(26~ \Omega\)
Subtopic: Combination of Resistors |
68%
From NCERT
NEET - 2024
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The terminal voltage of the battery, whose emf is \(10~\text V\) and internal resistance \(1~\Omega,\) when connected through an external resistance of \(4~\Omega\) as shown in the figure is:
1. \(6~\text V\)
2. \(8~\text V\)
3. \(10~\text V\)
4. \(4~\text V\)
1. \(6~\text V\)
2. \(8~\text V\)
3. \(10~\text V\)
4. \(4~\text V\)
Subtopic: EMF & Terminal Voltage |
65%
From NCERT
NEET - 2024
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The emf of a cell having internal resistance \(1~ \Omega\) is balanced against a length of \(330~\text{cm}\) on a potentiometer wire. When an external resistance of \(2 ~\Omega\) is connected across the cell, the balancing length will be:
| 1. | \(220~\text{cm}\) | 2. | \(330~\text{cm}\) |
| 3. | \(115~\text{cm}\) | 4. | \(332~\text{cm}\) |
Subtopic: Meter Bridge & Potentiometer |
From NCERT
NEET - 2023
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A copper wire of radius \(1\) mm contains \(10^{22}\) free electrons per cubic metre. The drift velocity for free electrons when \(10\) A current flows through the wire will be:
(Given, charge on electron = \(1.6\times10^{-19}\) C)
1. \(\frac{6.25\times10^4}{\pi}\) m/s
2. \(\frac{6.25}{\pi}\times10^3\) m/s
3. \(\frac{6.25}{\pi}\) m/s
4. \(\frac{6.25\times10^5}{\pi}\) m/s
(Given, charge on electron = \(1.6\times10^{-19}\) C)
1. \(\frac{6.25\times10^4}{\pi}\) m/s
2. \(\frac{6.25}{\pi}\times10^3\) m/s
3. \(\frac{6.25}{\pi}\) m/s
4. \(\frac{6.25\times10^5}{\pi}\) m/s
Subtopic: Current & Current Density |
71%
From NCERT
NEET - 2023
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