alleryTwo parallel wires carrying currents in OPPOSITE directions:
AAttract each other
BREPEL each other
CNo force
DTwist apart
Answer & Solution
Correct answer: B. REPEL each other
Same direction = attract (parallel currents try to merge)
opposite direction = repel.
Define of ampere (1948 definition) used this force: 1 A is the current that produces 2 × 10⁻⁷ N/m force between two parallel wires 1 m apart.
Keep practising Electromagnetism
Browse all Electromagnetism questions for JEE Advanced, or explore more Physics topics.
Related questions
For a charge distribution with volume density ρ, the total charge Q equalsThe electric flux through a closed surface enclosing a charge of +5 μC is (ε₀ = 8.85 × 10⁻The electric field on the axial line of a short electric dipole at distance r isAn electric dipole consists of two equal and opposite point charges ±q separated by distanGauss's law states that the total electric flux through a closed surface equalsThe electric field just outside a uniformly charged infinite plane with surface charge denThe electric field of an infinite line of charge with linear charge density λ at perpendicThe electric field at distance r from an isolated point charge q is