Two very thin and very long uniform wires, placed very close to each other, carry equal but opposite currents. Point 1 is exactly at the middle of those wires and point 2 is far away from the wires. Which one among the following regarding the net magnetic field produced is correct?
Magnetic field at point 2 is zero
Two long, closely spaced wires carrying equal and opposite currents act like a magnetic dipole pair. At the midpoint between them, the fields due to the two oppositely directed currents point the same way and add up, so the field there is not zero. Far away from the wires, however, the fields from the two opposite currents almost cancel out because of the tiny separation, so the net magnetic field at point 2 is effectively zero.
Ultrasonic waves are produced by making use of
Which one of the following is not a ferromagnetic material?
Liquids and gases never show
A charged particle moves through a magnetic field B with a velocity v. Which one of the following statements is true for the force (F) experienced by the particle?
The direction of magnetic field at any location on the earth’s surface is commonly specified in terms of ________.
A positively charged particle (alpha-particle) is projected towards west in a horizontal plane. It is deflected towards north in the same plane by a magnetic field. Which one among the following is the direction of the magnetic field?
With regard to the magnetic field lines, which one among the following statements is NOT correct?
What is the direction of magnetic field lines outside a magnet?
Which of the following statement is correct?
।. Magnetic field has both magnitude and direction.
II. The magnetic field inside a current-carrying straight long solenoid is the same at all points.
The magnetic effect of electric current was discovered by _____.
The important property of magnet which was exploited by navigators and travelers from the ancient times is:
The magnet used to lift and transport heavy loads like big metals, steel girders and scrap iron objects for loading and unloading purposes is known as____.