Physics-
General
Easy
Question
A conducting loop carrying a current I is placed in a uniform magnetic field pointing into the plane of the paper as shown. The loop will have a tendency to
- contract
- expand
- move towards +ve x-axis
- move towards –ve x-axis
The correct answer is: expand
So the force will be outward direction as shown in figure (according to Fleming’s left hand rule). So the loop will expand.
Related Questions to study
Physics-
The magnetic field at centre O of the circular portion of radius 3 cm carrying current 4 ampere in the wire is
The magnetic field at centre O of the circular portion of radius 3 cm carrying current 4 ampere in the wire is
Physics-General
Physics-
The magnetic field due to a bar magnet are correctly shown in
The magnetic field due to a bar magnet are correctly shown in
Physics-General
Physics-
A circular coil carries current I. An insulated infinitely long wire placed along the diameter of the coil is also carrying current I. The magnetic force on the wire is
A circular coil carries current I. An insulated infinitely long wire placed along the diameter of the coil is also carrying current I. The magnetic force on the wire is
Physics-General
Physics-
What is the current through the primary coil of the transformer shown below?
What is the current through the primary coil of the transformer shown below?
Physics-General
Physics-
Figure shows a straight wire placed between the pole pieces of a magnet. Induced emf will be developed across the ends of the wire, when it is moved towards
Figure shows a straight wire placed between the pole pieces of a magnet. Induced emf will be developed across the ends of the wire, when it is moved towards
Physics-General
Physics-
An electron moves on a straight line path XY as shown in the figure. The abcd is a coil adjacent to the path of electron. What will be the direction of current if any induced in the coil?
An electron moves on a straight line path XY as shown in the figure. The abcd is a coil adjacent to the path of electron. What will be the direction of current if any induced in the coil?
Physics-General
Physics-
A copper rod moves parallel to the horizontal direction. The induced emf developed across its ends to earths magnetic field will be maximum at the
A copper rod moves parallel to the horizontal direction. The induced emf developed across its ends to earths magnetic field will be maximum at the
Physics-General
Physics-
An electron moves on a straight line path XY as shown in the figure. The abcd is a coil adjacent to the path of electron. What will be the direction of current if any induced in the coil?
An electron moves on a straight line path XY as shown in the figure. The abcd is a coil adjacent to the path of electron. What will be the direction of current if any induced in the coil?
Physics-General
Physics-
Two coils are placed close to each other as shown in the figure. When the key K is pressed a current flows in the secondary coil abcd. What happens on breaking the circuit?
Two coils are placed close to each other as shown in the figure. When the key K is pressed a current flows in the secondary coil abcd. What happens on breaking the circuit?
Physics-General
Physics-
A small piece of substance is repelled by a strong permanent magnet. The substance is
A small piece of substance is repelled by a strong permanent magnet. The substance is
Physics-General
Physics-
What is the magnetic field at the center of circular loop in the circuit shown below? The wires crossing at P are insulated from each other.
What is the magnetic field at the center of circular loop in the circuit shown below? The wires crossing at P are insulated from each other.
Physics-General
Physics-
A rectangular loop carries a current Io. It is placed near a long straight conductor carrying current I as shown in figure. What will be the nature of the force experienced by the coil?
A rectangular loop carries a current Io. It is placed near a long straight conductor carrying current I as shown in figure. What will be the nature of the force experienced by the coil?
Physics-General
Physics-
Figure shows three parallel wires carrying currents as shown. The force on the wire b is
Figure shows three parallel wires carrying currents as shown. The force on the wire b is
Physics-General
Physics-
A circular coil is kept as shown in the figure horizontally. If a magnet falls freely from the above then the magnitude of induced current in the coil is
A circular coil is kept as shown in the figure horizontally. If a magnet falls freely from the above then the magnitude of induced current in the coil is
Physics-General
Physics-
An infinite straight current carrying conductor is bent into a circle as shown in the figure. If the radius of the circle is R, the magnetic field at the center of the coil is
An infinite straight current carrying conductor is bent into a circle as shown in the figure. If the radius of the circle is R, the magnetic field at the center of the coil is
Physics-General