If the current flow through an electrical appliance is greater than the maximum it can carry, the fuse in the appliance will _________.

Magnetic flux is the __________ of an area and the component of the magnetic field strength perpendicular to that area.

The unit of solid angle is _________.

To make a perfect convex lens of large diameter free from defects, ________ is used as the objective of the telescope instead of a convex lens. .

When an electric current flows through in an electrical conductor, it produces thermal energy because _________.

Simple 'single loop' circuits are called _________circuits.

The magnifying power of the compound microscope is the product of the magnification of the objective lens and ________.

Before the capacitor is charged, its capacitance and potential difference will __________.

Kirchhoff’s voltage rule is based on the conservation of ___________.