Please wait...

Physics Test 173
Result
Physics Test 173

  • /

    Score

  • -

    Rank
Time Taken: -
  • Question 1/10
    4 / -1

    Total electric force on an electric dipole placed in an electric field of a point charge is:

    Solutions

    Electric field of a point charge is non-uniform hence net force can never be zero.

     

  • Question 2/10
    4 / -1

    The magnitude of magnetic field at O (centre of the circular part) due to the current carrying coil as shown is :

    Solutions

     

  • Question 3/10
    4 / -1

    Eight point charges (can be assumed as small spheres uniformly charged and their centres at the corner of the cube) having values q each are fixed at vertices of a cube. The electric flux through square surface ABCD of the cube is

    Solutions

     

  • Question 4/10
    4 / -1

    A charged particle is moving in the region around a long current carrying wire. Due to wire, it may experience:

    Solutions

    The charge particle will experience magnetic as will as gravitational force due to wire. Gravitation force is  very small.

     

  • Question 5/10
    4 / -1

    The figure shows a charge q placed  inside a cavity in an uncharged conductor. 

    Now if an external electric field is switched on :

    Solutions

    The distribution of charge on the outer surface, depends only on the charges outside, and it distributes itself such that the net, electric field inside the outer surface due to the charge on outer surface and all the outer charges is zero. Similarly the distribution of charge on the inner surface, depends only on the charges inside the inner surface, and it distributes itself such that the net, electric field outside the inner surface due to the charge on inner surface and all the inner charges is zero.

    Also the force on charge inside the cavity is due to the charge on the inner surface. Hence only induced charge on outer surface will redistribute

     

  • Question 6/10
    4 / -1

    Two infinite sheets carrying current in same direction  (of equal current per unit length K) are separated by a distance ‘d’. A proton is released from a point between the plates with a velocity parallel to the sheets but perpendicular to the direction of current in the sheets. Then the path of the proton is 

    Solutions

    As the net force acting on the proton is zero, it will move on straight line

     

  • Question 7/10
    4 / -1

    Three large parallel charged conducting plates are placed at a small distance d apart from each other. The surface charge density on the face B of the conductor is +5.0 εo coulomb/m2 and that on face E is + 6.0 εo columb/m2. Charges on other faces are not known. The electric field intensity at P (shown in the figure) between the plates is

    Solutions

     

  • Question 8/10
    4 / -1

    A horizontal metallic rod of mass 'm'  and length  ' l '  is supported by two vertical identical springs of spring constant 'K'  each and natural length  l​0. A current  ' i ' is flowing in the rod in the direction shown. If the rod is in equilibrium then the length of each spring in this state is:

    Solutions

     

  • Question 9/10
    4 / -1

    A 150 m long metal wire connects points A and B. The electric potential at point B is 50 V less than that at point A. If the conductivity of the metal is 60 × 106 mho/m, then magnitude of the current density in the wire is equal to :

    Solutions

     

  • Question 10/10
    4 / -1

    A toroid of mean radius ' a ' , cross section radius ' r ' and total number of turns N. It carries a current ' i '. The torque experienced by the toroid if a uniform magnetic field of strength B is applied :

    Solutions

    The resultant magnetic dipole moment of toroid is zero.  of small parts of toroid turn along a circle and hence there resultant is zero.

    ∴ Torque acting on it is zero. 

     

User Profile
-

Correct (-)

Wrong (-)

Skipped (-)

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Click on Allow to receive notifications
×
Open Now