Advertisements
Advertisements
प्रश्न
Name any two effects of electric current.
Advertisements
उत्तर १
The two effects of electric current are:
- Heating effect of electric current.
- Magnetic effect of electric current.
उत्तर २
Electric current has the following effect:
- Electric current can give rise to heating and lighting.
- Electric current can convert a straight conductor into a temporary magnet.
APPEARS IN
संबंधित प्रश्न
An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s.
A heating coil has a resistance of 200 Ω. At what rate will heat be produced in it when a current of 2.5 A flows through it?
Solve the following example.
Two tungsten bulbs of wattage 100 W and 60 W power work on 220 V potential difference. If they are connected in parallel, how much current will flow in the main conductor?
Write scientific reason.
A coil made up of alloy Nichrome is used in the electric heater cooker as a resistor.
Mark the correct choice
- Assertion: Electric appliances with a metallic body have three wire connections.
- Reason: Three-pin connections reduce the heating of the connecting wires.
An electric cell produces electricity from the ______ ______ in it.
Unscramble the following words:
SFEU
Fuse is a strip of alloy wire which is made up of lead and tin with a very low ______.
An electric kettle of 2 kW is used for 2h. Calculate the energy consumed in
- kilowatt hour and
- joules.
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?
