Current Electricity PYQs - Last 10 Years
JEE Main / Physics / Electricity / 327 recent questions
PhysicsElectricity2017-2026
Practice 327 JEE Main Physics questions from Current Electricity. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 10 Years Current Electricity Questions
Showing 50 of 327 filtered questions.
1Current Electricity
A student is provided with a variable voltage source \(\mathrm{V}\), a test resistor \(R_{T}=10 ~\Omega\), two identical galvanometers \(G_{1}\) and \(G_{2}\) and two additional resistors, \(R_{1}=10 ~M \Omega\) and \(R_{2}=0.001 ~\Omega\)....
MCQ+4 / -12023
2Current Electricity
Figure shows a part of an electric circuit. The potentials at points \(a, b\) and \(c\) are \(30 \mathrm{~V}, 12 \mathrm{~V}\) and \(2 \mathrm{~V}\) respectively. The current through the \(20 ~\Omega\) resistor will be,
MCQ+4 / -12023
3Current Electricity
Two identical cells, when connected either in parallel or in series gives same current in an external resistance \(5 ~\Omega\). The internal resistance of each cell will be ___________ \(\Omega\).
INTEGER+4 / -12023
4Current Electricity
The drift velocity of electrons for a conductor connected in an electrical circuit is \(\mathrm{V}_{\mathrm{d}}\). The conductor in now replaced by another conductor with same material and same length but double the area of cross section. T...
MCQ+4 / -12023
5Current Electricity
The $\mathrm{H}$ amount of thermal energy is developed by a resistor in $10 \mathrm{~s}$ when a current of $4 \mathrm{~A}$ is passed through it. If the current is increased to $16 \mathrm{~A}$, the thermal energy developed by the resistor i...
MCQ+4 / -12023
6Current Electricity
The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by $50 \%$. The percentage change in voltage sensitivity of the galvanometer will be :
MCQ+4 / -12023
7Current Electricity
In the following circuit, the magnitude of current I1, is ___________ A.
INTEGER+4 / -12023
8Current Electricity
The charge flowing in a conductor changes with time as \(\mathrm{Q}(\mathrm{t})=\alpha \mathrm{t}-\beta \mathrm{t}^{2}+\gamma \mathrm{t}^{3}\). Where \(\alpha, \beta\) and \(\gamma\) are constants. Minimum value of current is :
MCQ+4 / -12023
9Current Electricity
If the potential difference between $\mathrm{B}$ and $\mathrm{D}$ is zero, the value of $x$ is $\frac{1}{n} \Omega$. The value of $n$ is __________.
INTEGER+4 / -12023
10Current Electricity
The equivalent resistance between $A$ and $B$ is _________.
MCQ+4 / -12023
11Current Electricity
In a metre bridge experiment the balance point is obtained if the gaps are closed by 2\(\Omega\) and 3\(\Omega\). A shunt of X \(\Omega\) is added to 3\(\Omega\) resistor to shift the balancing point by 22.5 cm. The value of X is __________...
INTEGER+4 / -12023
12Current Electricity
Ratio of thermal energy released in two resistors R and 3R connected in parallel in an electric circuit is :
MCQ+4 / -12023
13Current Electricity
When two resistance \(\mathrm{R_1}\) and \(\mathrm{R_2}\) connected in series and introduced into the left gap of a meter bridge and a resistance of 10 \(\Omega\) is introduced into the right gap, a null point is found at 60 cm from left si...
INTEGER+4 / -12023
14Current Electricity
A null point is found at 200 cm in potentiometer when cell in secondary circuit is shunted by 5\(\Omega\). When a resistance of 15\(\Omega\) is used for shunting, null point moves to 300 cm. The internal resistance of the cell is __________...
INTEGER+4 / -12023
15Current Electricity
With the help of potentiometer, we can determine the value of emf of a given cell. The sensitivity of the potentiometer is
(A) directly proportional to the length of the potentiometer wire
(B) directly proportional to the potential gradient...
(A) directly proportional to the length of the potentiometer wire
(B) directly proportional to the potential gradient...
MCQ+4 / -12023
16Current Electricity
In the given circuit, the equivalent resistance between the terminal A and B is __________ \(\Omega\).
INTEGER+4 / -12023
17Current Electricity
A uniform metallic wire carries a current 2 A, when 3.4 V battery is connected across it. The mass of uniform metallic wire is 8.92 \(\times\) 10\(^{-3}\) kg, density is 8.92 \(\times\) 10\(^{3}\) kg/m\(^3\) and resistivity is 1.7 $$\times$...
MCQ+4 / -12023
18Current Electricity
Two cells are connected between points A and B as shown. Cell 1 has emf of 12 V and internal resistance of 3\(\Omega\). Cell 2 has emf of 6V and internal resistance of 6\(\Omega\). An external resistor R of 4\(\Omega\) is connected across A...
INTEGER+4 / -12023
19Current Electricity
The resistance of a wire is 5 \(\Omega\). It's new resistance in ohm if stretched to 5 times of it's original length will be :
MCQ+4 / -12023
20Current Electricity
A hollow cylindrical conductor has length of 3.14 m, while its inner and outer diameters are 4 mm and 8 mm respectively. The resistance of the conductor is \(n\times10^{-3}\Omega\). If the resistivity of the material is $$\mathrm{2.4\times1...
INTEGER+4 / -12023
21Current Electricity
As shown in the figure, a network of resistors is connected to a battery of 24V with an internal resistance of 3 \(\Omega\). The currents through the resistors R\(_4\) and R\(_5\) are I\(_4\) and I\(_5\) respectively. The values of I\(_4\) ...
MCQ+4 / -12023
22Current Electricity
If a copper wire is stretched to increase its length by 20%. The percentage increase in resistance of the wire is __________%.
INTEGER+4 / -12023
23Current Electricity
A cell of emf 90 V is connected across series combination of two resistors each of 100\(\Omega\) resistance. A voltmeter of resistance 400\(\Omega\) is used to measure the potential difference across each resistor. The reading of the voltme...
MCQ+4 / -12023
24Current Electricity
In an experiment to find emf of a cell using potentiometer, the length of null point for a cell of emf \(1.5 \mathrm{~V}\) is found to be \(60 \mathrm{~cm}\). If this cell is replaced by another cell of emf E, the length-of null point incre...
INTEGER+4 / -12023
25Current Electricity
The equivalent resistance between \(A\) and \(B\) of the network shown in figure;
MCQ+4 / -12023
26Current Electricity
In the given circuit, the value of \(\left| {{{{\mathrm{I_1}} + {\mathrm{I_3}}} \over {{\mathrm{I_2}}}}} \right|\) is _____________
INTEGER+4 / -12023
27Current Electricity
Equivalent resistance between the adjacent corners of a regular n-sided polygon of uniform wire of resistance R would be :
MCQ+4 / -12023
28Current Electricity
Given below are two statements : One is labelled as Assertion \(\mathbf{A}\) and the other is labelled as Reason \(\mathbf{R}\).
Assertion A : For measuring the potential difference across a resistance of \(600 \Omega\), the voltmeter with ...
Assertion A : For measuring the potential difference across a resistance of \(600 \Omega\), the voltmeter with ...
MCQ+4 / -12023
29Current Electricity
A network of four resistances is connected to $9 \mathrm{~V}$ battery, as shown in figure. The magnitude of voltage difference between the points $\mathrm{A}$ and $\mathrm{B}$ is __________ $V$.
INTEGER+4 / -12023
30Current Electricity
Given below are two statements:
Statement I : The equivalent resistance of resistors in a series combination is smaller than least resistance used in the combination.
Statement II : The resistivity of the material is independent of temper...
Statement I : The equivalent resistance of resistors in a series combination is smaller than least resistance used in the combination.
Statement II : The resistivity of the material is independent of temper...
MCQ+4 / -12023
31Current Electricity
For designing a voltmeter of range $50 \mathrm{~V}$ and an ammeter of range $10 \mathrm{~mA}$ using a galvanometer which has a coil of resistance $54 \Omega$ showing a full scale deflection for $1 \mathrm{~mA}$ as in figure.
(A) for voltme...
(A) for voltme...
MCQ+4 / -12023
32Current Electricity
A potential \(\mathrm{V}_{0}\) is applied across a uniform wire of resistance \(R\). The power dissipation is \(P_{1}\). The wire is then cut into two equal halves and a potential of \(V_{0}\) is applied across the length of each half. The ...
INTEGER+4 / -12023
33Current Electricity
When a resistance of \(5 ~\Omega\) is shunted with a moving coil galvanometer, it shows a full scale deflection for a current of \(250 \mathrm{~mA}\), however when \(1050 ~\Omega\) resistance is connected with it in series, it gives full sc...
INTEGER+4 / -12023
34Current Electricity
Different combination of 3 resistors of equal resistance \(\mathrm{R}\) are shown in the figures. The increasing order for power dissipation is:
MCQ+4 / -12023
35Current Electricity
The current flowing through a conductor connected across a source is \(2 \mathrm{~A}\) and 1.2 \(\mathrm{A}\) at \(0^{\circ} \mathrm{C}\) and \(100^{\circ} \mathrm{C}\) respectively. The current flowing through the conductor at $$50^{\circ}...
INTEGER+4 / -12023
36Current Electricity
A wire of resistance \(160 ~\Omega\) is melted and drawn in a wire of one-fourth of its length. The new resistance of the wire will be
MCQ+4 / -12023
37Current Electricity
In the circuit diagram shown in figure given below, the current flowing through resistance \(3 ~\Omega\) is \(\frac{x}{3} A\).
The value of \(x\) is ___________
The value of \(x\) is ___________
INTEGER+4 / -12023
38Current Electricity
The current sensitivity of moving coil galvanometer is increased by \(25 \%\). This increase is achieved only by changing in the number of turns of coils and area of cross section of the wire while keeping the resistance of galvanometer coi...
MCQ+4 / -12023
39Current Electricity
Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in same time for parallel to series will be:
MCQ+4 / -12023
40Current Electricity
Two identical cells each of emf \(1.5 \mathrm{~V}\) are connected in series across a \(10 ~\Omega\) resistance. An ideal voltmeter connected across \(10 ~\Omega\) resistance reads \(1.5 \mathrm{~V}\). The internal resistance of each cell is...
INTEGER+4 / -12023
41Current Electricity
The current flowing through R\(_2\) is :
MCQ+4 / -12023
42Current Electricity
10 resistors each of resistance 10 \(\Omega\) can be connected in such as to get maximum and minimum equivalent resistance. The ratio of maximum and minimum equivalent resistance will be ___________.
INTEGER+4 / -12023
43Current Electricity
The equivalent resistance of the circuit shown below between points a and b is :
MCQ+4 / -12023
44Current Electricity
A rectangular parallelopiped is measured as \(1 \mathrm{~cm} \times 1 \mathrm{~cm} \times 100 \mathrm{~cm}\). If its specific resistance is \(3 \times 10^{-7} ~\Omega \mathrm{m}\), then the resistance between its two opposite rectangular fa...
INTEGER+4 / -12023
45Current Electricity
The circuit diagram of potentiometer used to measure the internal resistance of a cell (E) is shown in figure. The key 'K' is kept closed so as to send constant current through potentiometer wire. When key 'K1' is kept open the null point i...
INTEGER+4 / -12022
46Current Electricity
An electric cable of copper has just one wire of radius 9 mm. Its resistance is 14 \(\Omega\). If this single copper wire of the cable is replaced by seven identical well insulated copper wires each of radius 3 mm connected in parallel, the...
MCQ+4 / -12022
47Current Electricity
For the network shown below, the value of VB \(-\) VA is ____________ V.
INTEGER+4 / -12022
48Current Electricity
The variation of applied potential and current flowing through a given wire is shown in figure. The length of wire is 31.4 cm. The diameter of wire is measured as 2.4 cm. The resistivity of the given wire is measured as x \(\times\) 10\(-\)...
INTEGER+4 / -12022
49Current Electricity
Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance 2000 \(\Omega\) is used to measure the potential difference across 500 \(\Omega\) resistor, the reading of the voltmeter will be _______...
INTEGER+4 / -12022
50Current Electricity
The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of 2\(\Omega\). The value of internal resistance of each cell is
MCQ+4 / -12022