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Question 81

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According to Faraday's first law of electrolysis, the mass of a substance liberated at an electrode during electrolysis is

  1. AOption (a)

    Less than the quantity of electricity passed

  2. BOption (b)

    Directly proportional to the quantity of charge passed through the electrolyte

  3. COption (c)

    Equal to the quantity of electricity passed

  4. DOption (d)

    Inversely proportional to the quantity of electricity passed

View answer & explanation

Correct answer

Answer: (a)A.

Less than the quantity of electricity passed

Explanation not yet available.

Question 82

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If a book has a mass of 3 kg on earth, then how much does it weigh on the moon? (Take g = 10 m/s2)

  1. AOption (a)

    5 N

  2. BOption (b)

    20 N

  3. COption (c)

    10 N

  4. DOption (d)

    15 N

View answer & explanation

Correct answer

Answer: (a)A.

5 N

Explanation not yet available.

Question 83

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What is the SI unit for measuring angular velocity?

  1. AOption (a)

    Rotations per second

  2. BOption (b)

    Degrees per second

  3. COption (c)

    Revolutions per second

  4. DOption (d)

    Radians per second

View answer & explanation

Correct answer

Answer: (a)A.

Rotations per second

Explanation not yet available.

Question 84

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Which of the following is the surface with a constant value of potential at all points on the surface?

  1. AOption (a)

    Unipotential

  2. BOption (b)

    Equipotential

  3. COption (c)

    Unipolar

  4. DOption (d)

    Bipolar

View answer & explanation

Correct answer

Answer: (a)A.

Unipotential

Explanation not yet available.

Question 85

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Which of the following is an application of the magnetic effect of current?

  1. AOption (a)

    Electric bell

  2. BOption (b)

    Electric iron

  3. COption (c)

    Water heater

  4. DOption (d)

    Electric bulb

View answer & explanation

Correct answer

Answer: (a)A.

Electric bell

Explanation not yet available.

Question 86

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The unit of flux is the same as that of

  1. AOption (a)

    Reluctance

  2. BOption (b)

    Pole strength

  3. COption (c)

    Resistance

  4. DOption (d)

    Permeance

View answer & explanation

Correct answer

Answer: (a)A.

Reluctance

Explanation not yet available.

Question 87

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Which of the following is NOT an electronic device?

  1. AOption (a)

    Computer 

  2. BOption (b)

    Mobile

  3. COption (c)

    Magnifying glass

  4. DOption (d)

    iPad

View answer & explanation

Correct answer

Answer: (a)A.

Computer 

Explanation not yet available.

Question 88

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Which magnetic material's magnetic susceptibility is small and positive?

  1. AOption (a)

    Paramagnetic

  2. BOption (b)

    Ferromagnetic

  3. COption (c)

    None of the options

  4. DOption (d)

    Diamagnetic 

View answer & explanation

Correct answer

Answer: (a)A.

Paramagnetic

Explanation not yet available.

Question 89

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At what percent above the cost price should the marked price be fixed, so that after a discount of 10%, there is still a profit of 17%?

  1. AOption (a)

    25%

  2. BOption (b)

    22%

  3. COption (c)

    30%

  4. DOption (d)

    20%

View answer & explanation

Correct answer

Answer: (a)A.

25%

Explanation not yet available.

Question 90

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Two men or 4 women or 6 boys can do a work in 22 days. In how many days can 1 man, 1 woman and 1 boy together complete the work?

  1. AOption (a)

    20 days

  2. BOption (b)

    48 days

  3. COption (c)

    24 days

  4. DOption (d)

    16 days

View answer & explanation

Correct answer

Answer: (a)A.

20 days

Explanation not yet available.
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