JEE Questions for Physics Current Electricity I Quiz 9 - MCQExams.com

The current from the battery in circuit diagram shown is
Physics-Current Electricity I-65025.png
  • 1 A
  • 2 A
  • 1.5 A
  • 3 A
In the given figure, when key K is opened, the reading of the ammeter A will be
Physics-Current Electricity I-65027.png
  • 50 A
  • 2 A
  • 0.5 A

  • Physics-Current Electricity I-65028.png
In the given circuit, the potential of the point E is
Physics-Current Electricity I-65030.png
  • Zero
  • –8 V
  • –4/3 V
  • 4/3 V
Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is
  • 24 ohm
  • 16 ohm

  • Physics-Current Electricity I-65032.png

  • Physics-Current Electricity I-65033.png
The equivalent resistance between points a and b of a network shown in the figure is given by
Physics-Current Electricity I-65035.png

  • Physics-Current Electricity I-65036.png
  • 2)
    Physics-Current Electricity I-65037.png

  • Physics-Current Electricity I-65038.png

  • Physics-Current Electricity I-65039.png
A student has 10 resistors of resistance ‘r’. The minimum resistance made by him from given resistors is
  • 10 r
  • 2)
    Physics-Current Electricity I-65041.png

  • Physics-Current Electricity I-65042.png

  • Physics-Current Electricity I-65043.png
Two wires of same metal have the same length but their cross-sections are in the ratio 3 : 1. They are joined in series. The resistance of the thicker wire is 1052. The total resistance of the combination will be
  • 40 Ω
  • 2)
    Physics-Current Electricity I-65045.png

  • Physics-Current Electricity I-65046.png
  • 100 Ω
The equivalent resistance of the following infinite network of resistances is
Physics-Current Electricity I-65048.png
  • Less than 4 Ω
  • 4 Ω
  • More than 4 Ω. but less than 12 Ω
  • 12Ω
In the figure given below, the current passing through6Ω resistor is
Physics-Current Electricity I-65050.png
  • 0.40 ampere
  • 0.48 ampere
  • 0.72 ampere
  • 0.80 ampere
The current passing through the ideal ammeter in the circuit given below is
Physics-Current Electricity I-65052.png
  • 1.25 A
  • 1 A
  • 0.75 A
  • 0.5 A
In the Wheatstone\'s network given, P = 10 Ω, Q = 20 Ω, R = 15 Ω, S = 30 Ω. The current passing through the battery (of negligible internal resistance) is
Physics-Current Electricity I-65054.png
  • 0.36 A
  • 0 A
  • 0.18 A
  • 0.72 A
A copper wire of resistance R is cut into ten parts of equal length. Two pieces each are joined in series and then five such combinations are joined in parallel. The new combination will have a resistance
  • R
  • 2)
    Physics-Current Electricity I-65056.png

  • Physics-Current Electricity I-65057.png

  • Physics-Current Electricity I-65058.png
In the circuit shown the value of I in ampere is
Physics-Current Electricity I-65060.png
  • 1
  • 0.60
  • 0.4
  • 1.5
In the circuit shown, the point \'13\' is earthed. Thepotential at the point \'A\' is
Physics-Current Electricity I-65062.png
  • 14 V
  • 24 V
  • 26 V
  • 50 V
In the circuit shown below, the cell has an e.m.f. of 10 V and internal resistance of 1 ohm. The other resistances are shown in the figure. The potential difference VA– VB is
Physics-Current Electricity I-65064.png
  • 6 V
  • 4 V
  • 2V
  • –2 V
A wire of resistance R is cut into \'n\' equal parts. These parts are then connected in parallel. The equivalentresistance of the combination will be
  • nR
  • 2)
    Physics-Current Electricity I-65066.png

  • Physics-Current Electricity I-65067.png

  • Physics-Current Electricity I-65068.png
What is the current (i) in the circuit as shown in figure
Physics-Current Electricity I-65070.png
  • 2 A
  • 1.2 A
  • 1 A
  • 0.5 A
n equal resistors are first connected in series and then connected in parallel. What is the ratio of the maximum to the minimum resistance?
  • n
  • 2)
    Physics-Current Electricity I-65072.png

  • Physics-Current Electricity I-65073.png

  • Physics-Current Electricity I-65074.png
A uniform wire of 16 Ω is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance 16 Ω. The effective resistance between the other two opposite corners is
  • 32 Ω
  • 20 Ω
  • 8 Ω
  • 4 Ω
For what value of R the net resistance of the circuit will be 18 ohms?
Physics-Current Electricity I-65077.png
  • 8 Ω
  • 10 Ω
  • 16 Ω
  • 24 Ω
Three resistances 4 Ω each are connected in the form of an equilateral triangle. The effective resistance between two corners is
  • 8Ω
  • 12 Ω

  • Physics-Current Electricity I-65079.png

  • Physics-Current Electricity I-65080.png
What will be the equivalent resistance between the two points A and D?
Physics-Current Electricity I-65082.png
  • 10 Ω
  • 20 Ω
  • 30 Ω
  • 40 Ω
What is the equivalent resistance between A and B in the figure below if R = 3 Ω
Physics-Current Electricity I-65083.png
  • 9 Ω
  • 12 Ω
  • 15 Ω
  • None of these
Three resistances of values 2 Ω, 3 Ω and 6 Ω are to be connected to produce an effective resistance of 4 Ω. This can be done by connecting.
  • 6 Ω resistance in series with the parallel combination of 2 Ω and 3 Ω
  • 3 Ω resistance in series with the parallel combination of 2 Ω and 6 Ω
  • 2 Ω resistance in series with the parallel combination of 3 Ω and 6 Ω
  • 2 Ω resistance in parallel with the parallel combination of 3 Ω and 6 Ω
What is the equivalent resistance of the circuit?
Physics-Current Electricity I-65084.png
  • 6 Ω
  • 7 Ω
  • 8 Ω
  • 9 Ω
The equivalent resistance of the circuit shown in the figure is
Physics-Current Electricity I-65086.png
  • 8 Ω
  • 6 Ω
  • 5 Ω
  • 4 Ω
In the given figure, the equivalent resistance between the points A and B is
Physics-Current Electricity I-65088.png
  • 8 Ω
  • 6 Ω
  • 4 Ω
  • 2 Ω
A circuit consists of five identical conductors as shown in figure. The two similar conductors are added as indicated by the dotted lines. The ratio of resistances before and after addition will be
Physics-Current Electricity I-65090.png
  • 7/5
  • 3/5
  • 5/3
  • 6/5
If all the resistors shown have the value 2 ohm each, the equivalent resistance over AB is A
Physics-Current Electricity I-65092.png
  • 2 ohm
  • 4 ohm

  • Physics-Current Electricity I-65093.png

  • Physics-Current Electricity I-65094.png
The potential drop across the 3 Ω resistor is
Physics-Current Electricity I-65096.png
  • 1 V
  • 1.5 V
  • 2 V
  • 3 V
If each resistance in the figure is of 9 Ω, then reading of ammeter is
Physics-Current Electricity I-65098.png
  • 5 A
  • 8 A
  • 2A
  • 9 A
Two wires of equal diameters, of resistivities ρ1 and ρ2 and lengths l1 and l2, respectively, are joined in series. The equivalent resistivity of the combination is

  • Physics-Current Electricity I-65100.png
  • 2)
    Physics-Current Electricity I-65101.png

  • Physics-Current Electricity I-65102.png

  • Physics-Current Electricity I-65103.png
Four resistances of 100 Ω each are connected in the form of square. Then, the effective resistance along the diagonal points is
  • 200 Ω
  • 400 Ω
  • 100 Ω
  • 150 Ω
Equivalent resistance between the points A and B is (in Ω)
Physics-Current Electricity I-65106.png

  • Physics-Current Electricity I-65107.png
  • 2)
    Physics-Current Electricity I-65108.png

  • Physics-Current Electricity I-65109.png

  • Physics-Current Electricity I-65110.png
Two wires of the same material and equal length are joined in parallel combination. If one of them has half the thickness of the other and the thinner wire has a resistance of 8 ohms, the resistance of the combination

  • Physics-Current Electricity I-65112.png
  • 2)
    Physics-Current Electricity I-65113.png

  • Physics-Current Electricity I-65114.png

  • Physics-Current Electricity I-65115.png
In the circuit shown here, what is the value of the unknown resistor R so that the total resistance of the circuit between points P and Q is also
Physics-Current Electricity I-65117.png
  • 3 ohm
  • √39 ohm
  • √69 ohm
  • 10 Ω
A uniform wire of resistance 9 Ω is cut into 3 equal parts. They are connected in the form of equilateral triangle ABC. A cell of e.m.f. 2 V and negligible internal resistance is connected across B and C. Potential difference across AB is
  • 1 V
  • 2 V
  • 3 V
  • 0.5 V

Physics-Current Electricity I-65120.png
  • 4 Ω
  • 3 Ω

  • Physics-Current Electricity I-65121.png

  • Physics-Current Electricity I-65122.png

Physics-Current Electricity I-65124.png

  • Physics-Current Electricity I-65125.png
  • 2 ohm

  • Physics-Current Electricity I-65126.png
  • 3 ohm
In the circuit, the potential difference across PQ will be nearest to
Physics-Current Electricity I-65128.png
  • 9.6 V
  • 6.6 V
  • 4.8 V
  • 3.2 V
Find the equivalent resistance across AB.
Physics-Current Electricity I-65130.png
  • 1Ω
  • 2Ω
  • 3Ω
  • 4Ω
The current I drawn from the 5 volt source will be
Physics-Current Electricity I-65132.png
  • 0.5 A
  • 0.67 A
  • 0.17 A
  • 0.33 A
In a Wheatstone\'s bridge, three resistance P, Q and R are connected in the three arms and the fourth arm is formed by two resistances S1 and S2connected in parallel. The condition for the bridge to be balanced will be

  • Physics-Current Electricity I-65134.png
  • 2)
    Physics-Current Electricity I-65135.png

  • Physics-Current Electricity I-65136.png

  • Physics-Current Electricity I-65137.png
Two wires of the same dimensions but resistivities ρ1 and ρ2 are connected in series. The equivalent resistivity of the combination is

  • Physics-Current Electricity I-65139.png
  • 2)
    Physics-Current Electricity I-65140.png

  • Physics-Current Electricity I-65141.png

  • Physics-Current Electricity I-65142.png
A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be
Physics-Current Electricity I-65144.png
  • 1/3 A
  • 1 A
  • 1.5 A
  • 2A
In the circuit shown below, the reading of the voltmeter V is
Physics-Current Electricity I-65146.png
  • 12 V
  • 8 V
  • 0 V
  • 16 V
A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is
  • 9 ohm
  • 12 ohm
  • 6 ohm
  • 8/3 ohm
A series combination of two resistors. 1 Ω each is connected to a 12 V battery of internal resistance 0.4 Ω. The current flowing through it will be
  • 3.5 A
  • 5 A
  • 6 A
  • 10 A
In the circuit shown in the adjoining figure, the current between B and D is zero, the unknown resistance is of
Physics-Current Electricity I-65150.png
  • 4 Ω
  • 2Ω
  • 3 Ω
  • e.m.f of a cell is required to find the value of x
By using only two resistance coils-singly, in series or in parallel one should be able to obtain resistances of 3, 4, 12 and 16 ohm. The separate resistances of the coils are
  • 3 and 4
  • 4 and 12
  • 12 and 16
  • 16 and 3
0:0:1


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