Current Electricity PYQs - Last 10 Years

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Practice 48 NEET 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 48 of 48 filtered questions.

1Current Electricity

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. Th...

2Current Electricity

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 ...

3Current Electricity

A galvanometer of resistance $100 \Omega$ gives full scale deflection for a current of 1 mA . It is converted into an ammeter of range $0-10 \mathrm{~A}$. The shunt required is:

4Current Electricity

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:

5Current Electricity

In a metre bridge experiment (see figure), the positions of the cell, $E$, and galvanometer, $G$, are interchanged. We shall observe in the galvanometer:

6Current Electricity

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

7Current Electricity

A constant voltage of 50 V is maintained between the points $A$ and $B$ of the circuit shown in the figure. The current through the branch $C D$ of the circuit is:

8Current Electricity

The current passing through the battery in the given circuit, is:

9Current Electricity

A wire of resistance $R$ is cut into 8 equal pieces. From these pieces two equivalent resistances are made by adding four of these together in parallel. Then these two sets are added in series. The net effective resistance of the combinatio...

10Current Electricity

A uniform metal wire of length \(l\) has \(10 \Omega\) resistance. Now this wire is stretched to a length \(2l\) and then bent to form a perfect circle. The equivalent resistance across any arbitrary diameter of that circle is

11Current Electricity

The given circuit shows a uniform straight wire \(A B\) of \(40 \mathrm{~cm}\) length fixed at both ends. In order to get zero reading in the galvanometer \(G\), the free end of \(J\) is to be placed from \(B\) at:

12Current Electricity

A uniform wire of diameter \(d\) carries a current of \(100 \mathrm{~mA}\) when the mean drift velocity of electrons in the wire is \(v\). For a wire of diameter \(\frac{d}{2}\) of the same material to carry a current of $$200 \mathrm{~mA}$...

13Current Electricity

Choose the correct circuit which can achieve the bridge balance.

14Current Electricity

The terminal voltage of the battery, whose emf is \(10 \mathrm{~V}\) and internal resistance \(1 \Omega\), when connected through an external resistance of \(4 \Omega\) as shown in the figure is:

15Current Electricity

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 resis...

16Current Electricity

Two heaters \(A\) and \(B\) have power rating of \(1 \mathrm{~kW}\) and \(2 \mathrm{~kW}\), 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 i...

17Current Electricity

The emf of a cell having internal resistance \(1 \Omega\) is balanced against a length of \(330 \mathrm{~cm}\) on a potentiometer wire. When an external resistance of \(2 \Omega\) is connected across the cell, the balancing length will be :

18Current Electricity

A copper wire of radius \(1 \mathrm{~mm}\) contains \(10^{22}\) free electrons per cubic metre. The drift velocity for free electrons when \(10 \mathrm{~A}\) current flows through the wire will be (Given, charge on electron $$=1.6 \times 10...

19Current Electricity

A certain wire \(\mathrm{A}\) has resistance \(81 ~\Omega\). The resistance of another wire \(\mathrm{B}\) of same material and equal length but of diameter thrice the diameter of A will be :

20Current Electricity

10 resistors, each of resistance \(\mathrm{R}\) 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 ...

21Current Electricity

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 :

22Current Electricity

Resistance of a carbon resistor determined from colour codes is \((22000 \pm 5 \%) \Omega\). The colour of third band must be :

23Current Electricity

If the galvanometer \(G\) does not show any deflection in the circuit shown, the value of \(R\) is given by:

24Current Electricity

The magnitude and direction of the current in the following circuit is :-

25Current Electricity

The sliding contact C is at one fourth of the length of the potentiometer wire (AB) from A as shown in the circuit diagram. If the resistance of the wire AB is R0, then the potential drop (V) across the resistor R is

26Current Electricity

The equivalent resistance of the infinite network given below is :

27Current Electricity

A cell of emf 4 V and internal resistance 0.5 \(\Omega\) is connected to a 7.5 \(\Omega\) external resistance. The terminal potential difference of the cell is

28Current Electricity

The reciprocal of resistance is :

29Current Electricity

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 resistance P and Q

30Current Electricity

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

31Current Electricity

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

32Current Electricity

Three resistors having resistances r1, r2 and r3 are connected as shown in the given circuit. The ratio \({{{i_3}} \over {{i_1}}}\) of currents in terms of resistances used in the circuit is :

33Current Electricity

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.

...

34Current Electricity

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?

35Current Electricity

In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs?

36Current Electricity

A resistance wire connected in the left gap of a metre bridge balances a 10 \(\Omega\)
resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length o...

37Current Electricity

Which of the following graph represents the variation of resistivity (\(\rho\)) with temperature (T) for copper?

38Current Electricity

A charged particle having drift velocity 7.5\(\times\)10-4 ms-1 in an electric field of 3\(\times\)10-10 Vm-1 has a mobility in m2 V-1s-1 of :

39Current Electricity

The color code of a resistance is given below : The values of resistance and tolerance, respectively, are

40Current Electricity

The solids which have the negative temperature coefficient of resistance are :

41Current Electricity

Six similar bulbs are connected as shown in the figure with a DC source of emf E, and zero internal resistance.
The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one...

42Current Electricity

Which of the following acts as a circuit protection device?

43Current Electricity

In the circuits shown below, the readings of voltmeters and the ammeters will be :

44Current Electricity

A carbon resistor of (47 \(\pm\) 4.7) k\(\Omega\) is to be marked
with rings of different colours for its identification.
The colour code sequence will be

45Current Electricity

A battery consists of a variable number n of
identical cells (having internal resistance r each)
which are connected in series. The terminals
of the battery are short-circuited and the current
I is measured. Which of the graphs shows the
co...

46Current Electricity

A set of n equal resistors, of value R each, are
connected in series to a battery of emf E and
internal resistance R. The current drawn is I. Now,
the n resistors are connected in parallel to the
same battery. Then the current drawn from ba...

47Current Electricity

A potentiometer is an accurate and versatile device to make electrical measurements of EMF because the method involves

48Current Electricity

The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length. its new resistance will be