Advertisements
Advertisements
प्रश्न
The graph of voltage vs current for four different materials is shown below.
Which of these four materials would be used for making filament of bulb?
पर्याय
Q
S
P
R
Advertisements
उत्तर
P
APPEARS IN
संबंधित प्रश्न
How much heat will an instrument of 12 W produce in one minute if it is connected to the heat produced by it?
The current passing through an electric kettle has been doubled. The heat produced will become:
(a) half
(b) double
(c) four time
(d) one-fourth
Which of the following characteristic is not suitable for a fuse wire?
(a) thin and short
(b) thick and short
(c) low melting point
(d) higher resistance than rest of wiring
Heat energy is being produced in a resistance in a circuit at the rate of 100 W. The current of 3 A is flowing in the circuit. What must be the value of the resistance?
Write scientific reason.
A coil made up of alloy Nichrome is used in the electric heater cooker as a resistor.
Explain 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:
A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly:
The heating element of an electric iron is made up of:
Fuse is a strip of alloy wire which is made up of lead and tin with a very low ______.
