Magnetic Effects of Electric Current Test - 7

Vector is the quantity which has both magnitude and direction. Velocity is a vector quantity. Force is a vector quantity because it actually does depend in which direction you apply the force. Magnetic field is a vector quantity as it is specified by both magnitude and direction.

The human body is an electromagnetic organism. In human body, small electric currents travels along the nerve cells due to ions, same way as electricity flows through an electric wire. This current produces a very weak magnetic field in the human body.
Heart and brain are the two main organs in the human body where this magnetic field is quite significant.

An electric current will produce a magnetic field, which can be visualized as a series of circular field lines around a wire segment. So, given statement is true.

Overloading takes place when the live wire comes into direct contact with the neutral wire (This occurs when the insulation of wires is damaged or there is a fault in the appliance.) In such a situation, the current in the circuit abruptly increases. This is called Short-circuiting. Overloading is caused by connecting too many appliances to a single socket.
So, all statement are correct.

Magnetic field emerges from north pole to south pole and have only one direction, thus no two field lines overlap.
A wire with a red insulation is usually the live wire of an electric supply.
So, all sentence are incorrect.

The direction of induced current in a straight conductor is given by Fleming’s right hand rule. The thumb points towards the direction of current. Then fingers will wrap around the conductor in the direction of the field lines of the magnetic field

The magnetic field lines inside the solenoid are in the form of parallel straight lines. The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid.

The strength of magnetic field depends upon :

Amount of current flowing in the wire, more current will produce stronger field.

Length of wire , longer wire will produce stronger field.

Distance of point from the wire , more the distance of point from the wire weaker the field.

We will move the bar magnet into and out of the coil and this changing magnetic field will induce emf and electric current.

An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this is the conversion of mechanical energy into electrical energy and is done by an electric generator, which has much in common with a motor.