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Set 21 of 21 · Questions 601-612 of 612

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NEET Physics · Current Electricity · Set 21 (Q601-612)

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  1. 601.
    The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by 50%. The percentage change in voltage sensitivity of the galvanometer will be:
    1. (1)100%
    2. (2)50%
    3. (3)75%
    4. (4)0%
  2. 602.
    Kirchhoff's junction rule is a reflection of
    1. (1)Conservation of momentum
    2. (2)Conservation of current density vector
    3. (3)Conservation of charges
    4. (4)Conservation of energy.
  3. 603.
    Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
    Assertion A: Alloys such as constantan and manganin are used in making standard resistance coils.
    Reason R: Constantan and manganin have very small value of temperature coefficient of resistance.
    In the light of the above statements, choose the correct answer from the options given below.
    1. (1)Both A and R are true and R is the correct explanation of A.
    2. (2)Both A and R are true but R is NOT the correct explanation of A.
    3. (3)A is true but R is false.
    4. (4)A is false but R is true.
  4. 604.
    The value of in the figure shown below is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  5. 605.
    The equivalent resistance between points A and B in the given network is :
    1. (1)65
    2. (2)20
    3. (3)5
    4. (4)2
  6. 606.
    A, B and C are voltmeters of resistance R, 1.5R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are , and respectively. Then:
    1. (1) ¹ =
    2. (2) = ¹
    3. (3) ¹ ¹
    4. (4) = =
  7. 607.
    In the given circuit, the equivalent resistance between A and B is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 608.
    Consider a galvanometer shunted with resistance and 2% of current passes through it. What is the resistance of the given galvanometer?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  9. 609.
    If you are provided a set of resistances and . Connect these resistances so as to obtain an equivalent resistance of
    1. (1) and are in parallel with 2 and 8 in series
    2. (2)6 and 8 are in parallel with 2 and 4 in series
    3. (3)2 and 6 are in parallel with 4 and 8 in series
    4. (4)2 and 4 are in parallel with 6 and 8 in series
  10. 610.
    The potential difference ( – ) between the points A and B in the given figure is
    1. (1)+ 9 V
    2. (2)– 3V
    3. (3)+ 3 V
    4. (4)+ 6 V
  11. 611.
    The current 'i' in the circuit shown in the figure is
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 612.
    The resistance of a discharge tube is
    1. (1)non‐ohmic
    2. (2)ohmic
    3. (3)zero
    4. (4)both(b) and (c)