...finding the direction of magnetic force due to a current of known direction in a wire. Grasp the wire with the right hand, the thumb pointing in the direction of the current, the fingers will then encircle the wire in the direction of the magnetic force. Dr. Fleming's well-known rule for induced...

...corkscrew. If the wire be grasped by the right hand (Fig. 349) in such a way that the thumb points in the direction of the current, the fingers will point in the direction of the lines of force. The N-pole of a compass turns toward ~^lt the west either when a current is FIG...

...Thumb Rule (for straight wire). If we grasp the wire with our right hand, so that the THUMB points in the direction of the current, the FINGERS will point in the direction of the magnetic field. Similarly, if we know the direction of the magnetic field we can find the direction...

...any given case the direction of the lines may be determined by the following rule : Grasp the wire with the right hand, the thumb pointing in the direction of the current, the fingers will then point in the direction of the magnetic lines. The magnetic field surrounding a straight wire may...

...from the so-called thumb rule. If one grasps the wire with the right hand so that the thumb points in the direction of the current, the fingers will point in the direction of the magnetic field. FIG. 35 (<?) Put the wire under the compass and without changing the direction...

...The direction of the field can FIG. 23. always be determined by the following rule: Grasp the wire with the right hand, the thumb pointing in the direction of the current; the fingers will then point in the direction of the magnetic lines surrounding the wire. If the wire is near a magnetic...

...these lines may be determined by the right-hand rule, which is stated as follows: Grasp the conductor with the right hand, the thumb pointing in the direction of the current, and the fingers will indicate the sense of the lines of magnetic induction, Fig. 89. If, on the other...

...is by the thumb rule. THUMB RULE If we grasp the wire with our right hand, so that the THUMB points in the direction of the current, the FINGERS will point in the direction of the magnetic field. Similarly, if we know the direction of the magnetic field, we can find the direction...

...lie in planes at right angles to the axis of the wire. If the wire is grasped by the right hand with the thumb pointing in the direction of the current, the fingers will show the direction of the magnetic field (Fig. 10). This field extends to an indefinite distance from...

...lie in planes at right angles to the axis of the wire. If the wire is grasped by the right hand with the thumb pointing in the direction of the current, the fingers will show the direction of the magnetic field (Fig. 10). This field extends to an indefinite distance from...