A wire of resistance R is cut into three equal parts. These parts are then connected in parallel. The equivalent resistance is MCQ with Answer and Explanation

Explanation:
F = BIL sinθ. Maximum when θ = 90° (sin90°=1), so perpendicular. Parallel (θ=0°) force zero. This is the motor effect, used in electric motor.

Explanation:
Escape velocity (Ve) is the minimum velocity needed to overcome Earth's gravitational pull so that final velocity at infinity is zero. If launched with velocity v > Ve, the body will escape and, due to conservation of energy, retain a residual speed (v_infinity) at an infinite distance, calculated by v_infinity = √(v² - Ve²). Here, v = 2Ve, so it retains speed.

Explanation:
Speed has magnitude only, scalar. Velocity is vector (speed + direction). Momentum and force are vectors. Distance is scalar, displacement vector.