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Set 15 of 25 · Questions 421-450 of 723

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JEE Main Physics · Current Electricity · Set 15 (Q421-450)

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  1. 421.
    The equivalent resistance between A and B is . The value of is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  2. 422.
    Power dissipated across the 8 resistor in the circuit shown here is 2 watt. The power dissipated in watt units across the 3 resistor is
    1. (1)3.0
    2. (2)2.0
    3. (3)1.0
    4. (4)0.5
  3. 423.
    The resultant resistance between A and B in the given figure is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 424.
    A cell having an emf and internal resistance r is connected across a variable external resistance . As the resistance is increased, the plot of potential difference across is given by
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  5. 425.
    The potential difference between the points A and B in the given figure is [NEET 2016]
    1. (1)-3 V
    2. (2)+3 V
    3. (3)+6 V
    4. (4)+9 V
  6. 426.
    The equivalent resistance between A and B is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 427.
    Variation of resistance of the conductor with temperature is as shown. The temperature co-efficient of the conductor is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 428.
    Six resistors of 3 each are connected along the sides of a hexagon and three resistors of 6 each are connected along and as shown in the figure. The equivalent resistance between and is equal to
    1. (1)2
    2. (2)6
    3. (3)3
    4. (4)9
  9. 429.
    For the circuit shown in the figure, the current l will be [NEET 2020]
    1. (1)0.75 A
    2. (2)1 A
    3. (3)1.5 A
    4. (4)0.5 A
  10. 430.
    If the charge on the capacitor is in the given circuit,

    then .
    1. (1)6
    2. (2)0.4
    3. (3)0.6
    4. (4)10
  11. 431.
    A resistance is shown in the figure. Its value and tolerance are given respectively by:
    1. (1)270 Ω, 5%
    2. (2)27 kΩ, 20%
    3. (3)270 Ω, 10%
    4. (4)27 kΩ, 10%
  12. 432.
    A ring is made of a wire having a resistance = 12 Ω. Find the points A and B as shown in the figure, at which a current carrying conductor should be connected so that the resistance R of the sub circuit between these points is equal to .
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 433.
    In the circuit shown, a four-wire potentiometer is made of a long wire, which extends between A and B. The resistance per unit length of the potentiometer wire is . If an ideal voltmeter is connected as shown with jockey J at from end A, the expected reading of the voltmeter will be:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 434.
    The current I drawn from the 5 volt source will be
    1. (1)0.67 A
    2. (2)0.17 A
    3. (3)0.33 A
    4. (4)0.5 A
  15. 435.
    A 1m long wire is broken into two unequal parts X and Y The X part of the wire is starched into another wire W. Length of W is twice the length of X and the resistance of W is twice that of Y. Find the ratio of length of X and Y.
    1. (1)1 : 4
    2. (2)1 : 2
    3. (3)4 : l
    4. (4)2 : l
  16. 436.
    Two resistors and are connected in series across a 6 V battery. The potential difference measured by a voltmeter of across resistor is close to
    1. (1)
    2. (2)
    3. (3)2 V
    4. (4)
  17. 437.
    A metal wire of resistance is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on the circle make an angle at the centre, the equivalent resistance between these two points will be:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 438.
    The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of is applied. The resistance of galvanometer coil will be :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 439.
    With a resistance of in the left gap and a resistance of in the right gap of a meter bridge, the balance point is obtained at from the left end. In what way and to which resistance resistance to be connected to obtain the balance at from the left end?
    1. (1)in series with
    2. (2)parallel to
    3. (3)in series with
    4. (4)parallel to
  20. 440.
    Two identical cells each of emf 1.5 V are connected in parallel across a parallel combination of two resistors each of resistance 20. A voltmeter connected in the circuit measures 1.2 V. The internal resistance of each cell is
    1. (1)2.5
    2. (2)4
    3. (3)5
    4. (4)10
  21. 441.
    A resistor of resistance R is connected between the terminals of a cell of emf E and internal resistance r. If I is the current through the circuit. The terminal potential difference of the cell is given by
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  22. 442.
    If n represents the actual number of deflections in a converted galvanometer of resistance G and shunt resistance S. Then the total current I when its figure of merit is K will be:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 443.
    Two cells are connected in opposition as shown. Cell is of emf and internal resistance; the cell is of emf and internal resistance. The terminal potential difference of cell is:
  24. 444.
    The voltage drop across resistance in the given figure will be V.
  25. 445.
    The voltage across the resistor in the given circuit is volt.

    The value of to the nearest integer is____
  26. 446.
    In a meter bridge experiment is a standard resistance. is a resistance wire. It is found that balancing length is . If is replaced by a wire of half length and half diameter that of of same material, then the balancing distance (in ) will now be
  27. 447.
    A wire of resistance is divided into 10 equal parts, resulting pairs. A combination of two parts are connected in parallel and so on. Now resulting pairs of parallel combination are connected in series. The equivalent resistance of final combination is .
  28. 448.
    A network of four resistances is connected to 9 V battery, as shown in figure. The magnitude of voltage difference between the points A and B is__________V
  29. 449.
    In the given circuit, the equivalent resistance between the terminal A and B is_____ .
  30. 450.
    In the given circuit, the current flowing through the resistance is , while the ammeter reads . The value of is____ .