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1009 available questions

Physics · Question 451

A particle carrying a charge 3e, accelerates through a poteential difference of 2V. The energy acquired by it is:…

  1. 6eV
  2. 1.5eV
  3. 0.66eV
  4. 12eV
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Correct answer: A

6eV

Physics · Question 452

Potential divider circuit is made when:

  1. Current is divided
  2. Emf source is divided
  3. Resistance is divided
  4. Number of electrons are divided
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Correct answer: C

Resistance is divided

Physics · Question 453

Which of the following is not an assumption of the kinetic model of an ideal gas?

  1. The size of the molecules is much smaller than the separation between molecules
  2. Molecules suffer megligible momentum change during wall collisions.
  3. Molecules do not exer force on each other except during a collision
  4. The gas molecules are in random motion and my change their directionof motion after every collision.
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Correct answer: B

Molecules suffer megligible momentum change during wall collisions.

Physics · Question 454

Ripple factor of full wave rectifie is

  1. 1.21
  2. 0.6
  3. 0.482
  4. 0.9
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Correct answer: C

0.482

Physics · Question 455

Magnetic limes of force are:

  1. Imaginary lines which show actual magnetic field
  2. Actual lines which show actual magnetic field
  3. Imaginary lines which show imaginary magnetic field
  4. Actual lines which show imaginary magnetic field
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Correct answer: A

Imaginary lines which show actual magnetic field

Physics · Question 456

The number of diodes in bridge rectifier is:

  1. 4
  2. 3
  3. 2
  4. 5
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Correct answer: A

4

Physics · Question 457

The pendulum of a certain pendulum clock is made of brass. When the temperature increase, what happens to the period of the clock?

  1. It increases
  2. It decrease
  3. It remains the same
  4. It decreaes with the square of temperature
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Correct answer: A

It increases

Physics · Question 458

If a rotating body is moving anti-clockwise, the direction of angular velocity is

  1. Towards the centre
  2. Along the linear velocity
  3. Away from the center
  4. Prependicular to both radius and linear velocity
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Correct answer: D

Prependicular to both radius and linear velocity

Physics · Question 459

Magnetic flux is _______________ product.

  1. scalar
  2. vector
  3. simple
  4. none of these
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Correct answer: A

scalar

Physics · Question 460

When five times momentum of a body is equal to the kinetic energy of the same body then its velocity is equal to:

  1. 5S m/s
  2. 10 m/s
  3. 15 m/s
  4. 20 m/s
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Correct answer: B

10 m/s