The heating element of an electric iron is made up of:

Electrical resistivity of any given metallic wire depends upon

Electric power is inversely proportional to

In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be

A current of 0.5 A is drawn by a filament of an electric bulb. Number of electron passing through a cross-section of the filament in 32 seconds would be roughly

What is the minimum resistance which can be made using five resistors each of 1/2 Ω?

The proper representation of series combination of cells obtaining maximum potential is

A student carries out an experiment and plots the V ‒ I graph of three samples of nichrome wire with resistances R₁, R₂ and R₃ respectively as shown in figure. Which of the following is true?

In an electrical circuit, two resistors of 1/2 $\Omega$   and 1/4 $\Omega$   respectively are connected in series to a 6V battery. The heat dissipated by the 1/4  $\Omega$   resistor in 5s will be

If the potential difference across the ends of a conductor is doubled, the current flowing through it, gets ………