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

Related Mcqs:

1. In the electron microscope, electric & magnetic fields are used as_______________?

   A. Electromagnetic gun B. Source of electromagnetic waves C. Deflecting charged particle D. Converging source of electrons...

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

   A. charge in motion B. charge at rest C. both D. none...

3. Very weak magnetic fields are detected by___________________?

   A. Squids B. Magnetic resonance imaging (MRI) C. Magnetometer D. Oscilloscope...

4. 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...

5. 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...

6. 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...

7. An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if_________________?

   A. E = BeV B. B = eE/V C. E = BV D. E = BeV/2...

8. A bird sitting on a high tension electric wire does not get electrocuted because:

   A. Sit has high resistance B. the body is earthed C. it does not form a closed path for the flow of current D. its feet are good insulators Submitted by: Abid Hussain...

9. What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N ?

   A. 1A B. 10A C. 100A D. 1000A...

10. When a particle of charge q and mass m enters into a uniform magnetic field B moving with a velocity v perpendicular to the direction for the field it describes a circular path of radius___________________?

    A. R=qB/mV B. R=mV/qB C. R=qmV/B D. R=qmB/V...