Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
We know that, R = `"V"^2/"P"`
Thus, voltage remaining constant, resistance is inversely proportional to the power of the appliance; which means resistance of 60 W (220V) bulb is greater.
Hence, the given statement is false.
APPEARS IN
संबंधित प्रश्न
Define the unit of current.
Fill in the folloing blank with suitable words:
Current is measured in ............... using an ............... placed in ............... in a circuit.
A 5 V battery is connected to two 20 Ω resistors which are joined together in series.
(a) Draw a circuit diagram to represent this. Add an arrow to indicate the direction of conventional current flow in the circuit.
(b) What is the effective resistance of the two resistors?
(c) Calculate the current that flows from the battery?
(d) What is the p.d. across each resistor?
Two lamps, one rated 40 W at 220 V and the other 60 W at 220 V, are connected in parallel to the electric supply at 220 V.
(a) Draw a circuit diagram to show the connections.
(b) Calculate the current drawn from the electric supply.
(c) Calculate the total energy consumed by the two lamps together when they operate for one hour.
Which effect of current is utilised in the working of an electric fuse?
Tick(✓) the correct choice in the following:
Which of the following quantities has the same value for all electrical
appliances connected to the ring main circuit in a house?
What is meant by internal resistance of a cell?
Find the odd one out.
Loudspeaker, Bar magnet/magnet, Electric motor, Microphone.
