Current Electricity PYQs - Last 10 Years

JEE Main / Physics / Electricity / 327 recent questions

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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 27 of 327 filtered questions.

1Current Electricity

The Wheatstone bridge shown in figure, here, gets balanced when the carbon resistor used as R1 has the colour code (Orange, Red, Brown). The resistors R2 and R4 are 80\(\Omega\) and 40\(\Omega\), respectively. Assuming that the colour cod...

2Current Electricity

A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power supply of 11 V is connected across it is -

3Current Electricity

The actual value of resistance R, shown in the figure is 30\(\Omega\). This is measuered in an experiment as shown
using the standard formula R = \({V \over {\rm I}}\), where V and I are the readings of the voltmeter and ammeter, respectiv...

4Current Electricity

A current of 5 A passes through a copper
conductor (resistivity = 1.7 × 10–8 \(\Omega\)m) of radius
of cross-section 5 mm. Find the mobility of the
charges if their drift velocity is 1.1 × 10–3 m/s.

5Current Electricity

In a meter bridge experiment, the circuit
diagram and the corresponding observation
table are shown in figure

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6Current Electricity

In the given circuit, an ideal voltmeter
connected across the 10\(\Omega\) resistance reads 2V.
The internal resistance r, of each cell is:

7Current Electricity

In an experiment, the resistance of a material
is plotted as a function of temperature (in some
range). As shown in the figure, it is a straight
line. One may conclude that :

8Current Electricity

A moving coil galvanometer allows a full scale
current of 10–4 A. A series resistance of 2 M\(\Omega\)
is required to convert the above galvanometer
into a voltmeter of range 0-5 V. Therefore the
value of shunt resistance required to conve...

9Current Electricity

Space between two concentric conducting spheres of radii a and b (b > a) is filled with a medium of
resistivity \(\rho\). The resistance between the two spheres will be :

10Current Electricity

A galvanometer with its coil resistance 25 \(\Omega\) requires a current of 1 mA for its full deflection. In order to construct an ammeter to read upto a current of 2 A, the approximate value of the shunt resistance should be :

11Current Electricity

A heating element has a resistance of 100 \(\Omega\) at room temperature. When it is connected to a supply of 220 V, a steady current of 2 A passes in it and temperature is 500oC more than room temperature. what is the temperature coeffic...

12Current Electricity

In a circuit for finding the resistance of a galvanometer by half deflection method, a 6 V battery and a high resistance of 11 k\(\Omega\) are used. The figure of merit of the galvanometer is 60 \(\mu A/\)division. In the absence of shu...

13Current Electricity

In a meter bridge, as shown in the figure, it is given that resistance \(Y = 12.5\,\,\Omega\) and that the balance is obtained at a distance \(39.5\) \(cm\) from end \(A\) (by Jockey J). After interchanging the resistances \(X\) and $$Y$...

14Current Electricity

In the given circuit all resistances are of value \(R\) \(ohm\) each. The equivalent resistance between \(A\) and \(B\) is :

15Current Electricity

A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volume charge density of the rod is \(\rho\), how long will the changes take to travel a distance d ?

16Current Electricity

A constant voltages is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat developed in the wire will be :

17Current Electricity

On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The
resistance of their series combination is 1 k\(\Omega\). How much was the resistance on the left slot before
interchanging the resistanc...

18Current Electricity

In a potentiometer experiment, it is found that no current passes through the galvanometer when the
terminals of the cell are connected across 52 cm of the potentiometer wire. If the cell is shunted by a
resistance of 5 \(\Omega\), a balanc...

19Current Electricity

Two batteries with e.m.f 12 V and 13 V are connected in parallel across a load resistor of 10 \(\Omega\). The
internal resistances of the two batteries are 1 \(\Omega\) and 2 \(\Omega\) respectively. The voltage across the load lies betw...

20Current Electricity

A uniform wire of length 1 and radius r has a resistance of 100 \(\Omega\). It is recast into a wire of radius \({r \over 2}.\) The resistance of new wire will be :

21Current Electricity

The figure shows three circuits I, II and III which are connected to a 3V battery. If the powers dissipated by the configurations I, II and III are P1 , P2 and P3 respectively, then :

22Current Electricity

In a meter bridge experiment resistances are connected as shown in the figure. Initially resistance P = 4 \(\Omega\) and the neutral point N is at 60 cm from A. Now an unknown resistance R is connected in series to P and the new position o...

23Current Electricity

A 9 V battery with internal resistance of 0.5 \(\Omega\) is connected across an infinite network as shown in the figure. All ammeters A1, A2,
3 and voltmeter V are ideal.
Choose correct statement.

24Current Electricity

A potentiometer PQ is set up to compare two resistances as shown in the figure. The ammeter A in the circuit reads 1.0 A when two way key K3 is open. The balance point is at a length \(\ell\)1 cm from P when two way key K3 is plugged in...

25Current Electricity

In the given circuit, the current in each resistance is:

26Current Electricity

Which of the following statements is false?

27Current Electricity

When a current of 5 mA is passed through a galvanometer having a coil of resistance 15\(\Omega\), it shows full
scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into a
voltmeter of range...