Advertisements
Advertisements
प्रश्न
Name the material which is used for making the filaments of an electric bulb.
उत्तर
Tungsten is used for making the filament of an electric bulb.
APPEARS IN
संबंधित प्रश्न
Name any two effects of electric current.
The safety device based on the heating effect of electric current is called a ______.
Write down the formula for the heat produced when a current I is passed through a resistor R for time t.
The heat produced in a wire of resistance 'x' when a current 'y' flows through it in time 'z' is given by:
(a) x2 × y × z
(b) x × z × y2
(c) y × z2 × x
(d) y × z × x
An electric iron of 1100 W is operated for 2 hrs daily. What will be the electrical consumption expenses for that in the month of April? (The electric company charges Rs 5 per unit of energy).
Find the odd one out and give its explanation.
What is the heating effect of electric current?
An electric iron draws a current of 4 A when connected to 220 V mains. Its resistance must be:
Why is parallel arrangement used in domestic wiring?
A student boils water in an electric kettle for 20 minutes. Using the same mains supply he wants to reduce the boiling time of water. To do so should he increase or decrease the length of the heating element? Justify your answer.
