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The direction of electric field due to a negative charge is towards the charge where it is away from the charge if it is a positive charge. The diagram shows the electric lines of force around charges.

Stationary charge will produce electric field only as shown in the diagram. The magnetic field will be created only when the charge is under motion. A relative motion is so necessary for making a magnetic field by a charged particle.

Kirchhoff?s Current Law, often shortened to KCL, states that ?The algebraic sum of all currents entering and exiting a node or junction must equal zero.? This law is used to describe how a charge enters and leaves a wire junction point or node on a wire. The idea is made clear in the diagram.

As shown in the diagram an impedance triangle is derived from the voltage triangle by dividing each side by current.

The standard size of brick is 19 cm in length, 9cm in breadth and 9cm in height.
The nominal size of brick is 20cm in length, 10cm in breadth and 10cm in height.

The standard size of brick is 19cm in length, 9cm in breadth and 9cm in height. The nominal size of brick is 20cm in length, 10cm in breadth and 10cm in height. Nominal size include the mortar thickness.

The standard weight of the bricks should be in the range of 3 kilograms to 3.5 kilograms.
In Newton, the weight of one brick is 30 to 35 N.
Specific gravity of brick is 18 kN per cubicmetre.

Alumina is one of the chief ingredient of brick which imparts plasticity which helps to moulding.
Excessive alumina in bricks can cause shrinkage and warping.
Raw brick develop shrinkage , cracks, warping in presence of excess alumina.

Silica is the major content in the brick which prevent shrinkage, warping and cracking.
Durability depend on the silica content in brick.
If present in excess it reduces the cohesion between the particles and the brick becomes brittle.

The power to weight ratio remains unaffected even after if the number of cylinders in a multicylinder is increases because as the number of cylinders increases, torque is smoother and less flywheel mass is needed.

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