Two parallel wires carrying currents in the opposite directions____________________?

Related Mcqs:

1. 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...

2. Which one is the best material for making connecting wires ?

   A. iron B. tungsten C. silver D. copper...

3. Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in______________?

   A. Each increase B. Each decrease C. Each remains the same D. One increases whereas that in the other decreases...

4. If a current carrying solenoid is suspended freely it will__________________?

   A. be rotating B. come to rest in N-S direction C. vibrating like galvanometer needle D. comes to rest after rotation...

5. 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...

6. When a force is parallel to the direction of motion of the body, then work done on the body is_____________________?

   A. zero B. minimum C. infinity D. maximum...

7. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?

   A. Same B. Different C. At L will be more than at C D. At L will be less than at C...

8. An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is________________?

   A. greater than one meter B. less than one meter C. one meter D. a foolish question...

9. A lens which converges a beam of parallel rays to a point is called______________?

   A. diverging (or concave) lens B. converging (or convex) lens C. plano concave lens D. plano convex lens...

10. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?

    A. center of curvature B. focus C. optical center D. aperture...