Question

The direction of the force on a current carrying conductor held perpendicular to a uniform magnetic field is given by:

A.)Fleming’s right hand rule
B.)Ampere’s swimming rule
C.)Maxwell’s right hand cork screw rule
D.)Fleming’s left hand rule

Answer 1

Hint- As we know that when current flows through a straight long wire, the magnetic field forms a circular path around the loop. Now the current carrying conductor is held perpendicular in a uniform magnetic field. The two magnetic fields will interact with each other.

Complete step-by-step answer:
The rule which is used to give the direction of force on a current carrying conductor placed in a uniform magnetic field is known as Fleming’s left hand rule.

The Fleming’s left hand rule states that If we keep the thumb, forefinger and middle finger of the left hand opposite to each other such that the forefinger points in the direction of the magnetic field, the middle finger points in the direction of the current, so the thumb indicates the direction of the conductor's force (motion).

Hence the correct option is D.

Note- In order to solve these types of questions, you need to remember a few rules and where they are used. Some of the rules are Fleming’s right hand rule. This law says "Stretch out the right hand at the right angle to each other with the first finger, second finger and thumb. When the forefinger is the orientation of the force axis, the thumb points in the direction of motion or the force applied to the second finger points in the direction of the current caused.