Current Electricity PYQs - Last 5 Years

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All Current Electricity PYQs Last 10 Years Create chapter test

Practice 58 AP EAPCET 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 5 Years Current Electricity Questions

Showing 50 of 58 filtered questions.

1Current Electricity

In the given circuit, the internal resistance of the cell is zero. If $i_1$ and $i_2$ are the readings of the ammeter when the key $(K)$ is opened and closed respectively, then $i_1: i_2=$

2Current Electricity

In a meter bridge, the null point is located at 20 cm from left end of the wire when resistances $R$ and $S$ are connected in the left and right gaps respectively. If the resistance $S$ is shunted with $60 \Omega$ resistance, the null point...

3Current Electricity

If each resistance in the figure is $9 \Omega$, then the reading of the ammeter $(A)$ is

4Current Electricity

The area of cross-section of a copper wire is $4 \times 10^{-7} \mathrm{~m}^2$ and the electrons per cubic metre in copper is $8 \times 10^{28}$. If the wire carries a current of 6.4 A , then the drift velocity of the electrons ( $\mathrm{i...

5Current Electricity

The readings of the voltmeter and ammeter in the circuit shown in the diagram are respectively

6Current Electricity

When two identical batteries of internal resistance $1 \Omega$ each are connected in series across a resistor $R$, the rate of heat produced in $R$ is $P_1$. When the same batteries are connected in parallel across $R$, the rate of heat pro...

7Current Electricity

A maximum current of 0.5 mA can pass through a galvanometer of resistance $15 \Omega$. The resistance to be connected in series to the galvanometer to convert it into a voltmeter of range $0-10 \mathrm{~V}$ is

8Current Electricity

The potential difference across a conducting wire of length 20 cm is 30 V . If the electron mobility is $2 \times 10^{-6} \mathrm{~m}^2 \mathrm{~V}^{-1} \mathrm{~s}^{-1}$, then the drift velocity of the electrons is

9Current Electricity

A wire of resistance ' $R$ ' is bent in the form of a circular loop. Two points on the circle seperated by a quarter circumference are connected to a battery of emf ' $E$ ' and negligible internal resistance. The heat generated in the wire ...

10Current Electricity

When a wire is connected in the left gap of a metre bridge, the balancing point is at 40 cm from the left end of the bridge wire. If the wire in the left gap is stretched so that its length is doubled and again connected in the same gap, th...

11Current Electricity

A part of a circuit is shown in the figure. The ratio of the potential differences between the points $A$ and $C$ and the points $D$ and $E$ is

12Current Electricity

A DC supply of 160 V is used to charge a battery of emf 10 V and internal resistance $1 \Omega$ by connecting a series resistance of $24 \Omega$. The terminal voltage of the battery during charging is

13Current Electricity

In a metal, the charge carrier density is $9.1 \times 10^{28} \mathrm{~m}^{-3}$ and its electrical conductivity is $6.4 \times 10^7 \mathrm{~S} \mathrm{~m}^{-1}$. When an electric field of $10 \mathrm{NC}^{-1}$ is applied to the metal, then...

14Current Electricity

Charge ' $Q$ ' (in coulomb) flowing through a conductor in terms of time ' $t$ ' (in second) is given by the equation $Q=3 t^2+t$. The current in the conductor at time $t=3 \mathrm{~s}$ is

15Current Electricity

If current of 80 A is passing through a straight conductor of length 10 m , then the total momentum of electrons in the conductor is
(mass of electron $=9.1 \times 10^{-31} \mathrm{~kg}$ and charge of electron $=1.6 \times 10^{-19} \mathrm{...

16Current Electricity

The length and area of cross-section of a copper wire are respectively 30 m and $6 \times 10^{-7} \mathrm{~m}^2$. If the resistivity of copper is $1.7 \times 10^{-8} \Omega \mathrm{~m}$, then the resistance of the wire is

17Current Electricity

A straight wire of resistance $18 \Omega$ is bent in the form of an equilateral triangular loop. The effective resistance between any two vertices of the triangle is

18Current Electricity

The power dissipated by a uniform wire of resistance $100 \Omega$ when a potential difference of 120 V is applied across its ends is

19Current Electricity

A wire of resistance $100 \Omega$ is stretched, so that its length increases by $20 \%$. The stretched wire is then bent in the form of a rectangle whose length and breadth are in the ratio $3: 2$. The effective resistance between the ends ...

20Current Electricity

In a potentiometer experiment, when two cells of emfs $E_1$ and $E_2\left(E_2>E_1\right)$ are connected in series, the balancing length is 160 cm . If one of the cells is reversed, the balancing length decreases by $75 \%$. If $E_1=1.2 \mat...

21Current Electricity

In a meter bridge experiment, a resistance of $9 \Omega$ is connected in the left gap and an unknown resistance greater than $9 \Omega$ is connected in right gap. If the resistance in the gaps are interchanged, the balancing point shifts by...

22Current Electricity

The emf of a cell of internal resistance $2 \Omega$ is measured using a voltmeter of resistance $998 \Omega$. The error in the emf measured is

23Current Electricity

Current sensitivities of two galvanometers $G_1$ and $G_2$ of resistances $100 \Omega$ and $50 \Omega$ are $10^8 \mathrm{div} / \mathrm{A}$ and $0.5 \times 10^5 \mathrm{div} / \mathrm{A}$ respectively. The galvanometer in which the voltage ...

24Current Electricity

If $E_1=4 \mathrm{~V}$ and $E_2=12 \mathrm{~V}$, the current in the circuit and potential difference between the points $P$ and $Q$ respectively are

25Current Electricity

Two identical cells gave the same current through an external resistance of $2 \Omega$ regardless whether the cells are grouped in series or parallel. The internal resistance of the cells is

26Current Electricity

The potential difference across the ends of conductor is $\beta 0 \pm 03) \mathrm{V}$ and the current through the conductor is $(5 \pm 0.10)$ A. The error in the determination of the resistance of the conductor is

27Current Electricity

In the circuit shown in the figure, neglecting the source resistance, the voltmeter and ammeter readings respectively are

28Current Electricity

A battery of emf 8 V and internal resistance $0.5 \Omega$ is being charged by a 120 V DC supply using a series resister of $15.5 \Omega$. The terminal voltage of 8 V batter) during charging is

29Current Electricity

Resistance of a wire is $8 \Omega$. It is drawn in such a way that it experiences a longitudinal strain of $400 \%$. The final resistance of the wire is

30Current Electricity

Five equal resistances each $2 R$ connected as shown in figure. A battery of $V$ volts connected between $A$ and $B$. Then, current through $F C$ is

31Current Electricity

A lamp is rated at $240 \mathrm{~V}, 60 \mathrm{~W}$. When in use the resistance of the filament of the lamp is 20 times that of cold filament. The resistance of the lamp when not in use is

32Current Electricity

A cell of emf 1.2 V and internal resistance $2 \Omega$ is connected in parallel to another cell of emf 1.5 V and internal resistance $1 \Omega$. If the like poles of the cells are connected together, the emf of the combination of the two ce...

33Current Electricity

The charge $q$ (in coulomb) passing through a $10 \Omega$ resistor as a function of time $t$ (in second) is given by $q=3 t^2-2 t+6$. The potential difference across the ends of the resistor at time $t=5 \mathrm{~s}$ is

34Current Electricity

A current of 6 A enters one corner $P$ of an equilateral triangle $P Q R$ having three wires of resistance $2 \Omega$ each and leaves by the corner $R$ as shown in figure. Then the currents $I_1$ and $I_2$ are respectively

35Current Electricity

The value of shunt resistance that allows only $10 \%$ of main current through the galvanometer of resistance $99 \Omega$ is

36Current Electricity

A block has dimensions $1 \mathrm{~cm}, 2 \mathrm{~cm}$ and 3 cm . Ratio of the maximum resistance to minimum resistance between any palr of opposite faces of the block is

37Current Electricity

In the given circuit, if the potential at point $B$ is 24 V , the potential at point $A$ is

38Current Electricity

A straight wire of resistance $R$ is bent in the shape of $f_d$ square. A cell of emf 12 V is connected between two adjacent corners of the square. The potential difference across any diagonal of the square is

39Current Electricity

The voltage $V_0$ in the network shown is

40Current Electricity

The resistance between points $A$ and $C$ in the given network is

41Current Electricity

A steady current is flowing in a metallic conductor of non-uniform cross-section. The physical quantity which remains constant is

42Current Electricity

Drift speed $v$ varies with the intensity of electric field $E$ as per the relation.

43Current Electricity

In a potentiometer, the area of cross-section of the wire is $4 \mathrm{~cm}^2$. The current flowing in the circuit is 1 A and the potential gradient is $7.5 \mathrm{Vm}^{-1}$. Then, the resistivity of the potentiometer wire is

44Current Electricity

When a resistance $R_1$ is connected across a cell, the current is $I_1$ and if the resistance $R_1$ is replaced by $R_2$, the current is $I_2$. Then the internal resistance of the cell is

45Current Electricity

Charge passing through a conductor of cross-section $0.3 \mathrm{~m}^2$ is given by $q=\left(3 t^2+5 t+2\right) \mathrm{C}$ where $t$ is in seconds. The drift velocity at $t=2 \mathrm{~s}$ is (Concentration of electrons in the conductor $=2...

46Current Electricity

In the given circuit, if the current flowing through $5 \Omega$ resistor is 0.5 A , then the value of $E$ is

47Current Electricity

The drift velocity of electrons in a conducting wire connected to a cell is $v_d$. If the length of the wire is doubled and area of cross-section is halved, then the drift velocity of electrons becomes

48Current Electricity

In the given circuit values of \(I_1, I_2, I_3\) are respectively

49Current Electricity

The resistance of wire at \(0^{\circ} \mathrm{C}\) is \(20 \Omega\). If the temperature coefficient of the resistance is \(5 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}\). The temperature at which the resistance will be double of that at $$0^...

50Current Electricity

Current density in a cylindrical wire of radius \(R\) varies with radial distance as \(\beta\left(r+r_0\right)^2\). The current through the section of the wire shown in the figure is