Advertisements
Advertisements
Question
Name any two effects of electric current.
Advertisements
Solution 1
The two effects of electric current are:
- Heating effect of electric current.
- Magnetic effect of electric current.
Solution 2
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
RELATED QUESTIONS
An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.
How does the resistance of a wire vary with its:
diameter?
Why does the connecting cord of an electric heater not glow hot while the heating element does?
Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. Calculate:
- the total current taken from the supply
- the resistance of each heater and
- the energy supplied in kWh to the three heaters in 5 hours.
Give Scientific reason.
In practice, the unit kWh is used for the measurement of electrical energy, rather than joule.
Identify the figure and give its use.
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).
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:
An electric component used as a safety device is electric circuit is ______.
What are the factors affecting heating effect of electric current?
