Bulb - class-VI
Description: bulb | |
Number of Questions: 28 | |
Created by: Sara Dalvi | |
Tags: electrical appliances in everyday life simple electric circuits electricity and circuits electric circuit physics |
State whether given statement is True or False
An electric bulb is a source of electricity.
Fill in the blanks:
An electric bulb converts electrical energy into
A $2$ KW electric heater is connected to a $400$ V $50$ Hz mains supply. The peak value of electric current flowing in the circuit is approximately (take $\sqrt2=1.4$)
A building has $10$ bulbs of $40W$, $5$ bulbs of $100W$, $5$ fans of SOW and one heater of $1$ kilowatt.Every day bulbs are using for $5$ hours, fans are using for $8$ hours and heater is using for $1$ hour. The electric mains voltage is $220 V$. Calculate:
_________ wire is used in an electric bulb.
LEDs are extensively used to replace bulbs because:
When the current passes through the filament, it gets heated to incandescence and give light while the connecting wires are not heated because
A bulb of 100W means that it will consume electrical energy at the rate of
The bulbs which emit a bluish light, are
The filament of an electric bulb is of tungsten because
An electric bulb is filled with :
The filament of bulb offers ______ resistance to electric current.
When current is passed through an electric bulb, its filament glows, but the wire leading current to the bulb does not glow because :
The filament of a bulb is usually a
The material which is used as a filament for bulb has high ____________ .
Which of the following is/are properties of filament of bulb?
Which of the following things can be used as a filament of electric bulb?
Which of the following will create breaking of filament of a bulb?
A 25W and 100W bulb are joined in series and connected to the mains. Which bulb will glow brighter?
LEDs are extensively used to replace . bulbs because:
The glowing of electric bulb is based on _________ effect of current.
When an electric bulb breaks, there is a mild bang due to:
In the bulb there is a -
An electric bulb converts electrical energy into
The filament of an electric bulb is of tungston because
The filament of a bulb is usually a:
The wire of an electric lamp has a: