MCQ
Two free parallel wires carrying currents in the opposite directions:
- AAttract each other.
- BRepel each other.
- CDo not attract each other.
- DGet rotated to be perpendicular to each other.
✓
Answer
- Repel each other.
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
Ionisation energy of 10 times ionised sodium atom will be :
An example of an equipotential surface in earth is:
The kinetic energy of the electron in an orbit of radius r in hydrogen atom is (e = electronic charge)
|
(a) |
(b) |
(c) |
(d) |
A two metre wire is moving with a velocity of 1 m/sec perpendicular to a magnetic field of 0.5 weber/m2. The e.m.f. induced in it will be
|
(a) 0.5 volt |
(b) 0.1 volt |
(c) 1 volt |
(d) 2 volt |
If a source is transmitting electro-magnetic waves of frequency 8.196×106Hz, then the wavelength of the electro-magnetic waves transmitted from the source will be:
A photon will have less energy, if its:
Two resistances 
and 
when connected in series and parallel with 120 V line, power consumed will be 25 W and 100 W respectively. Then the ratio of power consumed by to that consumed by will be
|
(a) 1 : 1 |
(b) 1 : 2 |
(c) 2 : 1 |
(d) 1 : 4 |
Three long, straight parallel wires carrying current, are arranged as shown in figure. The force experienced by a 25 cm length of wire C is
|
(a) 10-3 N |
(b) 2.5 ×10-3 N |
(c) Zero |
(d) 1.5 × 10-3 N |
The north pole of a magnet is brought near a metallic ring. The direction of the induced current in the ring will be
|
(a) Clockwise |
(b) Anticlockwise |
(c) Towards north |
(d) Towards south |
The work done by the external force in bringing the charge q from infinity to a point is called as: