NEET Current Electricity PYQ practice sheet

20 previous-year NEET Physics questions from Current Electricity, newest papers first. Current Electricity carries 34 of the Physics questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   RE-NEET 2026

   Consider two circuits, (A) and (B), each having two resistors. One of them has a positive temperature coefficient of resistance, $+\alpha$, while the other one has a negative temperature of coefficient, $-\alpha$, as shown in the figure. The current through these circuits are denoted by $I_A$ and $I_B$. At initial temperature, the resistance of the two resistors is $R_0$. As the temperature is increased, the correct option that describes the variation of current in these circuits is: Figure: in circuit (A) the two resistors $R_0(1 - \alpha\Delta T)$ and $R_0(1 + \alpha\Delta T)$ are connected in series with the battery $V$. In circuit (B) the same two resistors are connected in parallel across the battery $V$.

   • (A)
     $I_A$ increases while $I_B$ decreases
   • (B)
     Both $I_A$ and $I_B$ remain constant
   • (C)
     $I_A$ remains constant while $I_B$ increases
   • (D)
     $I_A$ decreases while $I_B$ increases
2. 2.

   NEET 2026

   A resistor is connected to a battery of 12 V emf and internal resistance $2\ \Omega$. If the current in the circuit is 0.6 A, the terminal voltage of the battery is:

   • (A)
     10.8 V
   • (B)
     12 V
   • (C)
     10 V
   • (D)
     1.2 V
3. 3.

   NEET 2026

   A uniform metallic wire having resistance $4\ \Omega$ is bent to form a square loop ($ABCD$) (see figure). A resistance of $2\ \Omega$ is connected between points $B$ and $D$ and a battery of 2 V is connected across points $A$ and $C$ as shown in the figure. Now the value of current ($I$) is:

   • (A)
     4.5 A
   • (B)
     4 A
   • (C)
     8 A
   • (D)
     2 A
4. 4.

   NEET 2026

   A room heater is rated 400 W, 220 V. If the supply voltage drops to 200 V, what will be the power consumed (approximately)?

   • (A)
     121 W
   • (B)
     400 W
   • (C)
     200 W
   • (D)
     331 W
5. 5.

   NEET 2026

   In a metre bridge experiment (see figure), the positions of the cell, $E$, and galvanometer, $G$, are interchanged. We shall observe in the galvanometer: The resistances $R_1$ and $R_2$ are in the two gaps of the bridge, the galvanometer is connected across the outer ends of the gaps, and the cell is connected between the middle terminal and the jockey on the metre wire.

   • (A)
     Both right-sided and left-sided deflection and at balance point, no deflection
   • (B)
     There will be no deflection irrespective of the position of the jockey
   • (C)
     Only the right-sided deflection
   • (D)
     Only the left-sided deflection
6. 6.

   NEET 2024

   The terminal voltage of the battery, whose emf is 10 V and internal resistance $1\ \Omega$, when connected through an external resistance of $4\ \Omega$ as shown in the figure is: The battery (10 V) with its internal resistance (1 Ω, shown inside the dashed box) is connected in series with an external 4 Ω resistor.

   • (A)
     4 V
   • (B)
     8 V
   • (C)
     6 V
   • (D)
     10 V
7. 7.

   NEET 2024

   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:

   • (A)
     $26\ \Omega$
   • (B)
     $52\ \Omega$
   • (C)
     $55\ \Omega$
   • (D)
     $60\ \Omega$
8. 8.

   NEET 2024

   Choose the correct circuit which can achieve the bridge balance. Each circuit is a Wheatstone-type bridge with arms $10\,\Omega$, $10\,\Omega$, $15\,\Omega$ and $5\,\Omega$, a galvanometer $G$ between the two junctions, a diode $D$ connected with the $5\,\Omega$ arm, and a cell $E$ with a key. The four options are given below.

   • (A)
     
   • (B)
     
   • (C)
     
   • (D)
     
9. 9.

   NEET 2024

   Two heaters A and B have power rating of 1 kW and 2 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:

   • (A)
     1 : 1
   • (B)
     2 : 9
   • (C)
     2 : 3
   • (D)
     1 : 2
10. 10.

    NEET 2023

    If the galvanometer $G$ does not show any deflection in the circuit shown, the value of $R$ is given by : Circuit (described from the figure): A rectangular circuit. The left branch contains a $10\ \mathrm{V}$ battery (positive terminal up). The top wire contains a $400\ \Omega$ resistor followed by the galvanometer $G$. The middle vertical branch, joining the top wire (between the $400\ \Omega$ resistor and $G$) to the bottom wire, contains the resistor $R$. The right branch contains a $2\ \mathrm{V}$ battery (positive terminal up). The bottom wire carries an arrow indicating the direction of the main current.

    • (A)
      $400\ \Omega$
    • (B)
      $200\ \Omega$
    • (C)
      $50\ \Omega$
    • (D)
      $100\ \Omega$
11. 11.

    NEET 2023

    Resistance of a carbon resistor determined from colour codes is $(22000\pm5\%)\ \Omega$. The colour of third band must be :

    • (A)
      Yellow
    • (B)
      Red
    • (C)
      Green
    • (D)
      Orange
12. 12.

    NEET 2023

    The magnitude and direction of the current in the following circuit is Circuit (described from the figure): A rectangular loop $ABCD$. Along the top side from $A$ to $B$ are, in order: a $2\ \Omega$ resistor, a $10\ \mathrm{V}$ battery, a junction point $E$, a $5\ \mathrm{V}$ battery and a $1\ \Omega$ resistor. The side $BC$ is a plain wire, the bottom side $CD$ contains a $7\ \Omega$ resistor, and side $DA$ is a plain wire. The two batteries are connected in opposition (their like terminals face each other at $E$), with the $10\ \mathrm{V}$ battery driving current from $A$ towards $B$ through $E$.

    • (A)
      $1.5\ \mathrm{A}$ from $B$ to $A$ through $E$
    • (B)
      $0.2\ \mathrm{A}$ from $B$ to $A$ through $E$
    • (C)
      $0.5\ \mathrm{A}$ from $A$ to $B$ through $E$
    • (D)
      $\dfrac{5}{9}\ \mathrm{A}$ from $A$ to $B$ through $E$
13. 13.

    NEET 2023

    $10$ resistors, each of resistance $R$ are connected in series to a battery of emf $E$ and negligible internal resistance. Then those are connected in parallel to the same battery, the current is increased $n$ times. The value of $n$ is :

    • (A)
      1000
    • (B)
      10
    • (C)
      100
    • (D)
      1
14. 14.

    NEET 2023

    The resistance of platinum wire at $0^\circ\mathrm{C}$ is $2\ \Omega$ and $6.8\ \Omega$ at $80^\circ\mathrm{C}$. The temperature coefficient of resistance of the wire is :

    • (A)
      $3\times10^{-1}\ {}^\circ\mathrm{C}^{-1}$
    • (B)
      $3\times10^{-4}\ {}^\circ\mathrm{C}^{-1}$
    • (C)
      $3\times10^{-3}\ {}^\circ\mathrm{C}^{-1}$
    • (D)
      $3\times10^{-2}\ {}^\circ\mathrm{C}^{-1}$
15. 15.

    NEET 2022

    Two resistors of resistance, $100\ \Omega$ and $200\ \Omega$ are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in $100\ \Omega$ to that in $200\ \Omega$ in a given time is:

    • (A)
      4 : 1
    • (B)
      1 : 2
    • (C)
      2 : 1
    • (D)
      1 : 4
16. 16.

    NEET 2022

    As the temperature increases, the electrical resistance:

    • (A)
      decreases for conductors but increases for semiconductors
    • (B)
      increases for both conductors and semiconductors
    • (C)
      decreases for both conductors and semiconductors
    • (D)
      increases for conductors but decreases for semiconductors
17. 17.

    NEET 2022

    A copper wire of length 10 m and radius $\left(\dfrac{10^{-2}}{\sqrt{\pi}}\right)$ m has electrical resistance of 10 $\Omega$. The current density in the wire for an electric field strength of 10 (V/m) is:

    • (A)
      $10^{5}\ \text{A/m}^2$
    • (B)
      $10^{4}\ \text{A/m}^2$
    • (C)
      $10^{6}\ \text{A/m}^2$
    • (D)
      $10^{-5}\ \text{A/m}^2$
18. 18.

    NEET 2022

    A Wheatstone bridge is used to determine the value of unknown resistance $X$ by adjusting the variable resistance $Y$ as shown in the figure. For the most precise measurement of $X$, the resistances $P$ and $Q$:

    • (A)
      do not play any significant role
    • (B)
      should be approximately equal to each other and comparable in order to $X$
    • (C)
      should be approximately equal and are small
    • (D)
      should be very large and unequal
19. 19.

    NEET 2021

    The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is $0.25\ \Omega$. What will be the effective resistance if they are connected in series ?

    • (A)
      $4\ \Omega$
    • (B)
      $0.5\ \Omega$
    • (C)
      $0.25\ \Omega$
    • (D)
      $1\ \Omega$
20. 20.

    NEET 2021

    Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column - II gives some mathematical relations involving electrical quantities. Match Column - I and Column - II with appropriate relations.

    • (A)
      (A)-(R), (B)-(P), (C)-(S), (D)-(Q)
    • (B)
      (A)-(R), (B)-(S), (C)-(P), (D)-(Q)
    • (C)
      (A)-(R), (B)-(Q), (C)-(S), (D)-(P)
    • (D)
      (A)-(R), (B)-(S), (C)-(Q), (D)-(P)