MCQ
On passing electric current in two long straight conductors in mutually opposite directions, the magnetic force acting between them will be:
- AAttractive
- BRepulsive
- CBoth attractive and repulsive
- DNeither attractive nor repulsive
✓
Answer
- Repulsive
Explanation:
If electric current in two long straight conductors is in mutually opposite directions, the magnetic force acting between them will be repulsive.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Identify the paramagnetic substance
|
(a) Iron |
(b) Aluminium |
(c) Nickel |
(d) Hydrogen |
A coil having N turns carry a current I as shown in the figure. The magnetic field intensity at point P is
|
(a) |
(b) |
(c) |
(d) Zero |
A semiconductor is cooled from 
to 
Its resistance
|
(a) Will decrease |
|
(b) Will increase |
|
(c) Will first decrease and then increase |
|
(d) Will not change |
A radioactive sample has half-life of 5 years. Probability of decay in 10 years will be
|
(a) 100% |
(b) 75% |
(c) 50% |
(d) 25% |
What is the atomic mass (u) of chlorine?
Check the incorrect statement: When a magnet is moved into a coil the strength of the current depends on:
What is the equivalent capacitance between A and B in the given figure (all are in farad)
|
(a) |
(b) |
(c) |
(d) |
Which of the following statement is not correct
|
(a) Photographic plates are sensitive to infrared rays |
|
(b) Photographic plates are sensitive to ultraviolet rays |
|
(c) Infra-red rays are invisible but can cast shadows like visible light |
|
(d) Infrared photons have more energy than photons of visible light |
Mark the incorrect statement.
Three capacitors of capacitance 3 μF , 10 μF and 15 μF are connected in series to a voltage source of 100V. The charge on 15 μF is
|
(a) 50 μC |
(b) 100 μC |
(c) 200 μC |
(d) 280 μC |