Advertisements
Advertisements
प्रश्न
Draw a circuit diagram showing two electric lamps connected in parallel together with a cell and a switch that works both lamps. Mark an â’¶ on your diagram to show where an ammeter should be placed to measure the current.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
To increase the effective resistance in a circuit the resistors are connected in _____________.
In which direction do electrons flow?
What is the unit of electric current?
An electrician has wired a house in such a way that if a lamp gets fused in one room of the house, all the lamps in other rooms of the house stop working. What is the defect in the wiring?
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 an electric light bulb?
State two differences between the e.m.f and terminal voltage of a cell.
Match the pairs.
| ‘A’ Group | ‘B’ Group |
| 1. Free electrons | a. V/R |
| 2. Current | b. Increases the resistance in the circuit |
| 3. Resistivity | c. Weakly attached |
| 4. Resistances in series | d. VA/LI |
Define the following:
Super conductors
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
Two electric bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to electric mains of 220 V. Find the current drawn by the bulbs from the mains.
How should the electric lamps in a building be connected?
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
Unit of electric power may also be expressed as
Calculate the current in a wire if a charge of 1500 coulomb flows through it in 5 minutes.
Define the following:
Conventional current
