Fleming's Left Hand Rule

Q.

Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from the back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of the magnetic field?

Q.

The force between two parallel wires carrying current has been used to define

1. $ampere$

2. $couloumb$

3. $volt$

4. $watt$

Q.

The physical quantity that is indicated by the direction of thumb in Fleming's left-hand rule is

1. current

2. charge

3. motion of the conductor

4. magnetic field

Q. In Fleming’s left hand rule, the middle finger represents the direction of magnetic field.

1. True
2. False

Q.

Draw the pattern of magnetic field lines around a current-carrying straight conductor. Apply the right-hand thumb rule to mark the direction of the magnetic field.

Q.

An electron enters into the magnetic field and perpendicular to it, as shown in the figure. The direction of the force acting on the electrons will be?

1. Into the page.

2. To the left.

3. Out of the page.

4. To the right.

Q.

Suppose a room has a magnetic field, directed downwards. Then in order to experience the maximum magnetic force, the current carrying wire must be kept horizontal on the floor of the room.

1. True

2. False

Q.

A current of $4A$ is passed through a straight wire of length $3cm$ in a uniform perpendicular magnetic field of $12T$. What is the magnetic force experienced by the wire?

Q.

A positively-charged particle (alpha-particle) projected towards the west is deflected towards the north by a magnetic field in horizontal plane. The direction of the magnetic field is

1. Towards south

2. Towards east

3. Downward

4. Upward

Q. Sort the magnetic strength of electromagnet in ascending order from top to bottom when current is varying.

1. Current = 1 A
2. Current = 3 A
3. Current = 6 A
4. Current = 8 A
5. Current = 12 A

Q. Which of the following property of a proton can change while it moves freely in a uniform magnetic field?

1. Speed
2. Velocity
3. Mass
4. Charge

Q.

Calculate the force experienced by a conductor of length $0.3m$ carrying a current of $1A$, when placed in a uniform magnetic field of intensity $1.2N/A^2$.

Q.

what is a flux?

Q.

The force due to the magnetic field on a current carrying conductor is _______ to the magnetic field and_________ to the current.

1. perpendicular, parallel

2. parallel, parallel

3. parallel, perpendicular

4. perpendicular, perpendicular