A magnetic compass will be deflected if it is kept near a____________________?

Related Mcqs:

1. Which of the following are not deflected by electric and magnetic fields ?

   A. Alpha rays
   B. Beta rays
   C. Gamma rays
   D. None of these

   Submitted by: Aamir Balouch

2. Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________?

   A. magnetic flux
   B. magnetic field intensity
   C. magnetic induction
   D. self inductance

3. A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________?

   A. F=1/B
   B. F=1/Bsinθ
   C. F/0
   D. F=1/Bcosθ

4. If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________?

   A. τ = NIAB cosφ
   B. τ = NIAB sinφ
   C. τ = NIAB tanφ
   D. τ = NIAB

5. The mass of Platinum cylinder kept near Paris is________?

   A. 1 gram
   B. 1 Kg
   C. 100 Kg
   D. None

   Submitted by: Zahid Jagirani

6. An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?

   A. 2KWh
   B. 20KWh
   C. 6KWh
   D. 12KWh

7. Why the needle of iron swims on water surface when it is kept gently ?

   A. It will remain under the water, when it will displace more water than its weight
   B. the density of needle is less than that of water
   C. due to surface tension
   D. due to its shape

   Submitted by: Abid Hussain

8. A particle of mass m charge q and speed V enters a uniform magnetic radius r. The radius r of the circle is_________________?

   A. independent mass m
   B. directly proportional to m
   C. directly proportional to q
   D. directly proportional to B

9. The charged particle enters the uniform magnetic field in such a way that its initial velocity is not perpendicular to the field the orbit will be__________________?

   A. a circle
   B. a spiral
   C. an ellipse
   D. helix

10. When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is ___________________?

    A. a straight line parallel to the field
    B. a parabola in a plane perpendicular to the field
    C. a circle in a plane perpendicular to the field
    D. a straight line along its initial direction