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Current Electricity

30 questions · Physics · JEE Advanced
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Current Electricity

30 questions · Physics · JEE Advanced

  1. In the following circuit C1​=12μF,C2​=C3​=4μF and C4​=C5​=2μF. The charge stored in C3​ is ​μC. Includes diagram2022 · Shift 1 · Q39 · Numerical
  2. The figure shows a circuit having eight resistances of 1Ω each, labelled R1​ to R8​, and two ideal batteries with voltages ε1​=12 V and ε2​=6 V. Which of the following… Includes diagram2022 · Shift 1 · Q46 · Multiple correct
  3. Two resistances R1​=XΩ and R2​=1Ω are connected to a wire AB of uniform resistivity, as shown in the figure. The radius of the wire varies linearly along its axis from 0.2 mm at A to 1 mm at… Includes diagram2022 · Shift 2 · Q39 · Numerical
  4. In Circuit-1 and Circuit- 2 shown in the figures, R1​=1Ω,R2​=2Ω and R3​=3Ω. P1​ and P2​ are the power dissipations in Circuit-1 and Circuit-2 when the switches S1​ and… Includes diagram2022 · Shift 2 · Q46 · Multiple correct
  5. In order to measure the internal resistance r1 of a cell of emf E, a meter bridge of wire resistance R0 = 50 Ω, a resistance R0/2, another cell of emf E/2 (internal resistance r) and a galvanometer G are used in a circuit, as shown… Includes diagram2021 · Shift 2 · Q55 · Numerical
  6. Shown in the figure is a semicircular metallic strip that has thickness t and resistivity ρ. Its inner radius is R1 and outer radius is R2. If a voltage V0 is applied between its two ends, a current I flows in it. In addition, it is… Includes diagram2020 · Shift 1 · Q46 · Multiple correct
  7. In the balanced condition, the values of the resistances of the four arms of a Wheatstone bridge are shown in the figure below. The resistance R3 has temperature coefficient 0.0004 ∘ C-1. If the temperature of R3 is increased by 100… Includes diagram2020 · Shift 2 · Q50 · Numerical
  8. In the circuit shown, initially there is no charge on the capacitors and keys S1 and S2 are open. The values of the capacitors are C1 = 10 μ F, C2 = 30 μ F and C3 = C4 = 80 μ F. Which of the statement(s) is/are correct? Includes diagram2019 · Shift 1 · Q45 · Multiple correct
  9. Two identical moving coil galvanometers have 10 Ω resistance and full scale deflection at 2 μ A current. One of them is converted into a voltmeter of 100 mV full scale reading and the other into an ammeter of 1 mA full scale…2019 · Shift 1 · Q47 · Multiple correct
  10. An incandescent bulb has a thin filament of tungsten that is heated to high temperature by passing an electric current. The hot filament emits black-body radiation. The filament is observed to break up at random locations after a…2016 · Shift 1 · Q50 · Multiple correct
  11. An infinite line charge of uniform electric charge density l lies along the axis of an electrically conducting infinite cylindrical shell of radius R. At time t = 0, the space inside the cylinder is filled with a material of permittivity e…2016 · Shift 1 · Q53 · MCQ
  12. Consider two identical galvanometers and two identical resistors with resistance R. If the internal resistance of the galvanometers Rc < R/2, which of the following statement(s) about anyone of the galvanometers is(are) true?2016 · Shift 2 · Q46 · Multiple correct
  13. In the circuit shown below, the key is pressed at time t = 0. Which of the following statement(s) is (are) true? Includes diagram2016 · Shift 2 · Q49 · Multiple correct
  14. In an aluminium (Al) bar of square cross section, a square hole is drilled and is filled with iron (Fe) as shown in the figure. The electrical resistivities of Al and Fe are 2.7 × 10 − 8 Ω m and 1.0 × 10 − 7 Ω… Includes diagram2015 · Shift 1 · Q56 · Multiple correct
  15. In the following circuit, the current through the resistor R(=2 Ω) is I amperes. The value of I is : Includes diagram2015 · Shift 2 · Q49 · Numerical
  16. Two ideal batteries of emf V1 and V2 and three resistances R1, R2 and R3 are connected as shown in the figure. The current in resistance R2 would be zero if Includes diagram2014 · Shift 1 · Q55 · Multiple correct
  17. A galvanometer gives full scale deflection with 0.006 A current. By connecting it to a 4990 Ω resistance, it can be converted into a voltmeter of range 0-30V. If connected to a 2492n​Ω resistance, it becomes an…2014 · Shift 1 · Q58 · Numerical
  18. During an experiment with a metre bridge, the galvanometer shall a null point when the jockey is pressed at 40.0 cm using a standard resistance of 90 Ω, as shown in the figure. The least count of the scale used in the meter bridge… Includes diagram2014 · Shift 2 · Q48 · MCQ
  19. A thermal power plant produces electric power of 600 kW at 4000 V, which is to be transported to a place 20 km away from the power plant for consumers' usage. It can be transported either directly with a cable of large current carrying…2013 · Shift 2 · Q52 · MCQ
  20. For the resistance network shown in the figure, choose the correct option(s). Includes diagram2012 · Shift 1 · Q55 · Multiple correct
  21. A meter bridge is set up as shown, to determine an unknown resistance X using a standard 10 Ω resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm, respectively, for… Includes diagram2011 · Shift 1 · Q59 · MCQ
  22. Two batteries of different emfs and different internal resistance are connected as shown. The voltage across AB in volts is ​. Includes diagram2011 · Shift 2 · Q57 · Numerical
  23. Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the increase in temperature. If at room temperature, 100, 60 and 40 W bulbs have filament resistances R100, R60 and R40 respectively,…2010 · Shift 1 · Q67 · MCQ
  24. To verify Ohm's law, a student is provided with a test resitor RT, a high resistance R1, a small resistance R2, two identical galvanometers G1 and G2, and a variable voltage source V. The correct circuit to carry out the experiment is2010 · Shift 1 · Q68 · MCQ
  25. Consider a thin square sheet of side L and thickness, made of a material of resistivity ρ. The resistance between two opposite faces, shown by the shaded areas in the figure is Includes diagram2010 · Shift 1 · Q72 · MCQ
  26. When two identical batteries of internal resistance 1 Ω each are connected in series across a resistor R, the rate of heat produced in R is J1. When the same batteries are connected in parallel across R, the rate is J2. If J1 = 2.25…2010 · Shift 1 · Q83 · Numerical
  27. For the circuit shown in the figure Includes diagram2009 · Shift 1 · Q49 · Multiple correct
  28. Figure shows three resistor configurations R1, R2 and R3 connected to 3 V battery. If the power dissipated by the configuration R1, R2 and R3 is P1, P2 and P3, respectively, then Includes diagram2008 · Shift 1 · Q48 · MCQ
  29. STATEMENT - 1 In a Meter Bridge experiment, null point for an unknown resistance is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as…2008 · Shift 1 · Q57 · MCQ
  30. A resistance of 2 Ω is connected across one gap of a metre-bridge (the length of the wire is 100 cm) and an unknown resistance, greater than 2 Ω, is connected across the other gap. When these resistance are interchanged, the…2007 · Shift 1 · Q45 · MCQ