If a current carrying solenoid is suspended freely it will__________________?

Related Mcqs:

1. A simple pendulum suspended from the ceiling of a lift has time period T when the lift is at rest. When the lift falls freely, the time period is_________________?

   A. Infinite
   B. T/g
   C. Zero
   D. g/T

2. The magnetic field strength of solenoid is__________________?

   A. B = μNI
   B. B = μN/I
   C. B = μnI
   D. Both B and C

3. Distance covered by a freely falling body in 2 seconds will be__________________?

   A. 4.9 m
   B. 19.6 m
   C. 39.2 m
   D. 44.1 m

4. A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10 ?

   A. 15 m
   B. 20 m
   C. 5 m
   D. 25 m

5. If a body of mass 10 kg is allowed to fall freely, its weight becomes______________?

   A. 0
   B. 89N
   C. 9.8 N
   D. 10N

6. 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

7. Coil of a galvanometer is suspended in a radial magnetic field so that the deflecting torque on the coil is always___________________?

   A. BINA cosa
   B. BINA sina
   C. BINA tana
   D. BINA

8. A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ?

   A. 0.01J
   B. 0.02J
   C. 0.04J
   D. 1.0J

9. A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be______________?

   A. 9.8 N
   B. 19.6 N
   C. 129.4 N
   D. 39.2 N

10. Two parallel wires carrying currents in the opposite directions____________________?

    A. repel each other
    B. attract each other
    C. have no effect upon each other
    D. they cancel out their individual magnetic fields