JEE Questions for Physics Current Electricity I Quiz 17 - MCQExams.com

On increasing the temperature of a conductor, itsresistance increases because the
  • Relaxation time increases
  • Mass of electron increases
  • Electron density decreases
  • Relaxation time decreases
  • Relaxation time remains constant
The potential difference between points A and B ofadjoining figure is
Physics-Current Electricity I-65761.png

  • Physics-Current Electricity I-65762.png
  • 2)
    Physics-Current Electricity I-65763.png

  • Physics-Current Electricity I-65764.png
  • 2V
Two resistors of resistance R1 and R2 having R1> R2 are connected in parallel. For equivalent resistance R, thecorrect statement is
  • R> R1 + R2
  • R1< R < R2
  • R2< R < (R1 + R2)
  • R < R1
A wire of resistance 12 ohms per metre is bent to form a complete circle of radius 10 cm. The resistance between its two diametrically opposite points A and B as shownin the figure, is
Physics-Current Electricity I-65767.png
  • 0.6 π Ω
  • 3 Ω
  • 6 π Ω
  • 6 Ω
In the circuit shown, the current through the 4 Ω. resistor is 1 amp when the points P and M are connected to a D.C. voltage source. The potential difference between the points M and N is
Physics-Current Electricity I-65770.png
  • 0.5 V
  • 3.2 V
  • 1.5 V
  • 1.0 V
The reading of the ammeter as per figure shown is
Physics-Current Electricity I-65773.png

  • Physics-Current Electricity I-65774.png
  • 2)
    Physics-Current Electricity I-65775.png

  • Physics-Current Electricity I-65776.png

  • Physics-Current Electricity I-65777.png
There are n similar conductors each of resistance R. The resultant resistance comes out to be x when connected in parallel. If they are connected in series, the resistancecomes out to be
  • x/n2
  • n2x
  • x/n
  • nx
Equivalent resistance between A and B will be
Physics-Current Electricity I-65780.png
  • 2 Ω
  • 18 Ω
  • 6 Ω
  • 3.6 Ω
The effective resistance between the points A and B in the figure is
Physics-Current Electricity I-65782.png
  • 5 Ω
  • 2 Ω
  • 3 Ω
  • 4 Ω
Nine resistors each of 1 k Ω are connected to a battery of 6 V as shown in the circuit given below. What is the total current flowing in the circuit?
Physics-Current Electricity I-65784.png
  • 3mA
  • 2)
    Physics-Current Electricity I-65785.png

  • Physics-Current Electricity I-65786.png
  • 2mA
Three resistances of 4 Ω each are connected as shown in figure. If the point D divides the resistance into two equal halves, the resistance between point A and D willbe
Physics-Current Electricity I-65788.png
  • 12 Ω
  • 6 Ω
  • 3 Ω
  • 1/3 Ω
The potential difference between A and B in the following figure is
Physics-Current Electricity I-65790.png
  • 24 V
  • 14 V
  • 32 V
  • 48 V
A metallic wire of resistance of 12 Ω is bent to form a square. The resistance between two diagonal points would be
  • 12 Ω
  • 24 Ω
  • 6 Ω
  • 3 Ω
Figure shows a network of eight resistors, each equal to 2 Ω, connected to a 3V battery of negligible internalresistance. The current I in the circuit is 3V
Physics-Current Electricity I-65794.png
  • 0.25 A
  • 0.50 A
  • 0.75 A
  • 1.0 A
If the ammeter in the given circuit reads 2 A, the resistance R is
Physics-Current Electricity I-65796.png
  • 1 ohm
  • 2 ohm
  • 3 ohm
  • 4 ohm
Two resistors are connected (a) in series (b) in parallel. The equivalent resistance in the two cases are 9 ohm and 2 ohm respectively. Then the resistances of the component resistors are
  • 2 ohm and 7 ohm
  • 3 ohm and 6 ohm
  • 3 ohm and 9 ohm
  • 5 ohm and 4 ohm
Resistances of 6 ohm each are connected in the manner shown in adjoining figure. With the current 0.5 ampere as shown in figure, the potential difference VP– VQ is
Physics-Current Electricity I-65799.png
  • 3.6 V
  • 6.0 V
  • 3.0 V
  • 7.2 V
The equivalent resistance of the arrangement of resistances shown in adjoining figure between the points A and B is
Physics-Current Electricity I-65801.png
  • 6 ohm
  • 8 ohm
  • 16 ohm
  • 24 ohm
In the network of resistors shown in the adjoining figure, the equivalent resistance between A and B is
Physics-Current Electricity I-65803.png
  • 54 ohm
  • 18 ohm
  • 36 ohm
  • 9 ohm
A wire is broken in four equal parts. A packet is formed by keeping the four wires together. The resistance of the packet in comparison to the resistance of the wirewill be
  • Equal
  • One fourth
  • One eight
  • 1/16 th
Four resistances are connected in a circuit in the given figure. The electric current flowing through 4 ohm and 6 ohm resistance is respectively
Physics-Current Electricity I-65806.png
  • 2 amp and 4 amp
  • 1 amp and 2 amp
  • 1 amp and 1 amp
  • 2 amp and 2 amp
An infinite sequence of resistances is shown in the figure. The resultant resistance between A and B will be, when R1 =1 ohm and R2 = 2 ohm
Physics-Current Electricity I-65808.png
  • Infinity
  • 1 Ω
  • 2 Ω
  • 1.5 Ω
The equivalent resistance between points A and B with switch S open and closed are respectively
Physics-Current Electricity I-65810.png
  • 4 Ω, 8 Ω
  • 8 Ω, 4 Ω
  • 6 Ω, 9 Ω
  • 9 Ω, 6 Ω
In the figure shown, the total resistance between A and B is
Physics-Current Electricity I-65812.png
  • 12 Ω
  • 4 Ω
  • 6 Ω
  • 8 Ω
The current from the battery in circuit diagram shown is
Physics-Current Electricity I-65814.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-65816.png
  • 50 A
  • 2 A
  • 0.5 A

  • Physics-Current Electricity I-65817.png
In the given circuit, the potential of the point E is
Physics-Current Electricity I-65819.png
  • Zero
  • –8 V
  • –4/3 V
  • 4/3 V
Three resistance P, Q R each of 2 Ω and an unknown resistance S form the four arms of a Wheatstone bridge circuit. When a resistance of 6 Ω is connected in parallel to S the bridge gets balanced. What is the value of S?
  • 2 Ω
  • 3 Ω
  • 6 Ω
  • 1 Ω
Three resistances each of 1 ohm, are joined in parallel. Three such combinations are put in series, then theresultant resistance will be
  • 9 ohm
  • 3 ohm
  • 1 ohm

  • Physics-Current Electricity I-65825.png
In the circuit shown the value of I in ampere is
Physics-Current Electricity I-65831.png
  • 1
  • 0.60
  • 0.4
  • 1.5
The effective resistance across the points A and I is
Physics-Current Electricity I-65833.png
  • 2 Ω
  • 1 Ω
  • 0.5 Ω
  • 5 Ω
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

  • Physics-Current Electricity I-65835.png
  • 2)
    Physics-Current Electricity I-65836.png

  • Physics-Current Electricity I-65837.png

  • Physics-Current Electricity I-65838.png
The resistance between the terminal points A and B of the given infinitely long circuit will be
Physics-Current Electricity I-65840.png

  • Physics-Current Electricity I-65841.png
  • 2)
    Physics-Current Electricity I-65842.png

  • Physics-Current Electricity I-65843.png

  • Physics-Current Electricity I-65844.png
The current in the given circuit is
Physics-Current Electricity I-65846.png
  • 8.31 A
  • 6.82 A
  • 4.92 A
  • 2 A
What is the current (i) in the circuit as shown in figure?
Physics-Current Electricity I-65848.png
  • 2 A
  • 1.2 A
  • 1 A
  • 0.5 A
For what value of R the net resistance of the circuit will be 18 ohms
Physics-Current Electricity I-65855.png
  • 8 Ω
  • 10 Ω
  • 16 Ω
  • 24 Ω
In the figure, current through the 3 Ω resistor is 0.8 ampere, then potential drop through 4 Ω resistor is
Physics-Current Electricity I-65857.png
  • 9.6 V
  • 2.6 V
  • 4.8 V
  • 1.2 V
What is the equivalent resistance between A and B in the figure below if R = 3 Ω?
Physics-Current Electricity I-65862.png
  • 9 Ω
  • 12 Ω
  • 15 Ω
  • None of these
What is the equivalent resistance between A and B?
Physics-Current Electricity I-65864.png

  • Physics-Current Electricity I-65865.png
  • 2)
    Physics-Current Electricity I-65866.png

  • Physics-Current Electricity I-65867.png

  • Physics-Current Electricity I-65868.png
What is the equivalent resistance of the circuit?
Physics-Current Electricity I-65869.png
  • 6 Ω
  • 7 Ω
  • 8 Ω
  • 9 Ω
10 wires (same length, same area, same material) are connected in parallel and each has 1 Ω resistance, then the equivalent resistance will be
  • 10 Ω
  • 1 Ω
  • 0.1 Ω
  • 0.001 Ω
The equivalent resistance of the circuit shown in the figure is
Physics-Current Electricity I-65872.png
  • 8 ohm
  • 6 ohm
  • 5 ohm
  • 4 ohm
In the given figure, the equivalent resistance between the points A and B is
Physics-Current Electricity I-65874.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-65876.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
Physics-Current Electricity I-65878.png
  • 2 ohm
  • 4 ohm

  • Physics-Current Electricity I-65879.png

  • Physics-Current Electricity I-65880.png
A battery of emf 10 V and internal resistance 3 Ω, is connected to a resistor as shown in the figure. If the current in the circuit is 0.5 A, then the resistance of theresistor will be
Physics-Current Electricity I-65882.png
  • 19 Ω
  • 17 Ω
  • 10 Ω
  • 12 Ω
The potential drop across the 3 Ω resistor is
Physics-Current Electricity I-65884.png
  • 1 V
  • 1.5 V
  • 2 V
  • 3 V
In the given figure, potential difference between A andB is
Physics-Current Electricity I-65886.png
  • 0
  • 5 volt
  • 10 volt
  • 15 volt
If each resistance in the figure is of 952 then reading ofammeter is
Physics-Current Electricity I-65888.png
  • 5A
  • 8 A
  • 2 A
  • 9 A
Four resistances 10 Ω, 5 Ω, 7 Ω and 3 Ω are connected so that they form the sides of a rectangle AB, BC, CD and DA respectively. Another resistance of 10 Ω isconnected across the diagonal AC. The equivalentresistance between A and B is
  • 2Ω
  • 5Ω
  • 7Ω
  • 10Ω
0:0:1


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