Advertisements
Advertisements
प्रश्न
What happens to the other bulbs in a parallel circuit if one bulb blows off?
Advertisements
उत्तर
When one of the bulbs in a parallel circuit blows off, it does not affect the other bulbs
APPEARS IN
संबंधित प्रश्न
Choose the correct alternative and rewrite the following sentence.
When the resistance of a conductor increases, the current will ________ increase.
Which of the following units could be used to measure electric charge?
(a) ampere
(b) joule
(c) volt
(d) coulomb
The atoms of copper contain electrons and the atoms of rubber also contain electrons. Then why does copper conduct electricity but rubber does not conduct electricity?
What is the conventional direction of the flow of electric current? How does it differ from the direction of flow electrons?
A flash of lighting carries 10 C of charge which flows for 0.01 s. What is the current? If the voltage is 10 MV, what is the energy?
Three resistors are connected as shown in the diagram.
Through the resistor 5 ohm, a current of 1 ampere is flowing.
(i) What is the current through the other two resistors?
(ii) What is the p.d. across AB and across AC?
(iii) What is the total resistance
If the lamps are both the same in the figure given below and if A1 reads 0.50 A, what do A2, A3, A4 and A5 read?

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.
State two differences between the e.m.f and terminal voltage of a cell.
A wire of uniform thickness with a resistance of 27Ω is cut into three equal pieces and they are joined in parallel. Find the equivalent resistance of the parallel combination.
Calculate the equivalent resistance between A and B in the adjacent diagram.

Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
Electrical appliances have voltage and power ratings as listed below. Which
has the larger working resistance?
| Appliances | Voltage (V) | Power (W) |
| (a) Washing machine | 250 | 3000 |
| ( b) Television | 240 | 160 |
| (c)240 | 240 | 1500 |
| ( d) Hair curler | 250 | 20 |
| ( e) Car head lamp | 12 | 36 |
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
My mother was operating washing machine on Sunday morning. Suddenly, she saw a spark coming out of the electric board and the electric current in the house failed. An electrician was called to look into the matter. What should he have noticed.
The power of an electric device is a product of ______ and ______.
One unit of electrical energy consumed is equal to 1000 kilowatt-hour.
When an electric current is passed, electrons move from:
An ammeter is always placed in parallel with the circuit.
