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?
Vertically upwards
Using F = qv × B with velocity towards west and the required force towards north for a positive charge, applying the right-hand rule shows the magnetic field must point vertically upward. Any other direction (south, east, or vertically downward) would produce a deflection in a different direction. Hence the magnetic field points vertically upwards.
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 ________.
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?
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____.