Ampere's Experiment

Q.

Describe the activity that shows that a current-carrying conductor experiences a force perpendicular to its length and the external magnetic field. How does Fleming’s left-hand rule help us to find the direction of the force acting on the current-carrying conductor?

Q.

No force acts on a current carrying conductor when it is __________ to the magnetic field.

Q. Question 12
Name some devices in which electric motors are used?

Q. The technique used for obtaining images of internal organs is called _________.

1. Magnetic Resonance Imaging
2. Magnetic Resistance Imaging
3. Electric Resistance Imaging
4. Electric Resonance Imaging

Q.

The direction of the force acting on a current-carrying conductor placed perpendicular to a magnetic field is given by Flemings left-hand rule.

1. True
2. False

Q. Under what condition an electron moving through a magnetic field experiences maximum and minimum force?

Q. Two long parallel wires are separated by a distance of 2 m and carry current 2 A each in opposite directions. The magnitude of magnetic field at point P between the conductors is

1. $\frac{{\mu }_0}{\pi }T$
2. Zero
3. $\frac{{\mu }_0}{2\pi }T$
4. $\frac{2{\mu }_0}{\pi }T$

Q. Explain Fleming's left-hand rule.

Q. Assertion (A): Current is the rate of flow of charge.
Reason (R): Electric current will not flow between two charged bodies when connected, if they are at the same potential.

1. Both A and R are true, and R is the correct reason for A.
2. A is false, but R is true.
3. A is true, but R is false.
4. Both A and R are true, but R is not the correct reason for A.

Q. A straight current-carrying conductor is placed in such a way that the current in the conductor flows in the direction out of the plane of the paper. The conductor is placed between two poles of two magnets, as shown. The conductor will experience a force in the direction towards.

1. $S$
2. $Q$
3. $R$
4. $P$

Q. In which of the following cases a straight current-carrying conductor does not experience a force?

1. The direction of the current is perpendicular to the magnetic field.
2. The direction of the current is parallel to the magnetic field.
3. The angle between the conductor and the magnetic field is ${60}^{\circ }$.
4. The angle between the conductor and the magnetic field is ${45}^{\circ }$.

Q. In which direction does the wire move if the current flows through the wire in the downward direction?

1. 
2. 
3. 
4. 

Q. 35.Explanations of magnetic force on a current carrying conductor.

Q. What is Left hand rule? Explain it with a diagram.

Q. Name and state the rule which is used to determine the direction of force on a current carrying conductor placed in a magnetic field.

Q. In which of the following cases a straight current-carrying conductor does not experience a force?

Q.

A current carrying conductor placed in an external magnetic field experiences a force. The force on the conductor will increase if :

1. External magnetic field increases

2. Electric current increases

3. All of the above

4. Length of the conductor increases

Q.

Which of the following is not associated with Flemings left hand rule?

1. Resistance

2. Magnetic field

3. Force

4. current

Q. Two parallel wires carrying same current I experience a force F. The graph which gives a straight line is

1. $FversusI$
2. $Fversus{I}^2$
3. $F^{2}versusI$
4. $Fversus{I}^{–1}$

Q.

Which rule helps to find the direction of force acting on a current-carrying conductor placed in a magnetic field. State the rule.

Q. A current carrying conductor

1. Does not experience a force when it is in magnetic field
2. Experiences the force only when the field is electromagnetic in nature
3. none of the above
4. Experiences a force when it is in magnetic field

Q. What happens when a current carrying conductor is placed in a magnetic field?

Q. How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field ?

1. No direction.
2. Direction of force is reversed.
3. cant say
4. Direction of force remains same.

Q. A current carrying conductor.

1. Experience a force when it is in magnetic field
2. Does not experience a force when it is in magnetic field
3. Experiences the force only when the field is electromagnetic in nature
4. None of the above

Q. (a) What is an electric motor? With the help of a labelled diagram, describe the working of a simple electric motor.
(b) What are the special features of commercial electric motors?

Q. (a) Explain an activity to show that a current-carrying conductor experiences a force when placed in a magnetic field.
(b) State the rule which gives the direction of force acting on the conductor..
(c) An electron moves perpendicular to a magnetic field as shown in the figure. What would be the direction of force experienced on the electron?

Q. What happens to the force experienced by a current carrying conductor in a uniform magnetic field, when placed perpendicular to the magnetic field?

Q. What will happen if we remove magnets from electric motor

Q. Describe an activity with labelled diagram to show that a current carrying conductor experiences a force in a magnetic field.

Q. State condition when magnitude of force on a current carrying conductor placed in a magnetic field is zero.

1. When current in conductor is normal to the direction of magnetic field
2. When current in conductor is in the direction of magnetic field
3. When current in conductor is acute angled to the direction of magnetic field
4. When current in conductor is obtuse angled to the direction of magnetic field