Symbols of Electric Components
Important Questions on Symbols of Electric Components
Which of these is the correct arrangement of electric cells in a battery?
The symbols for different components of an electric circuit are shown below.
Draw an electric circuit with symbols that has the following conditions.
- Battery contains three electric cells.
- Switch is turned OFF.
- Two electric bulbs are in series.
Will the bulb in the following circuits glow? Give reasons.
The following diagram shows four circuits A, B, C and D. Each circuit has a cell and a torch bulb. Name the circuits in which the bulb will glow? Give reason to your answer
Many electrical devices like televisions and electric irons have plugs which have 3 pins. However, other devices sometimes work with only 2 pins. Why is the third pin necessary?
The diagram shows a flashlight battery and a bulb connected by wires to various substances. Which of the bulbs will light?
See the circuit shown below in figure P. If the battery is connected the other way (as shown in figure Q), what will happen?
In which of the following circuit will the bulb glow?
Which of the following circuit diagram represents the given torch?
In normal use, a current of flows through a hairdryer. Choose a suitable fuse from the following: . Explain your choice.
A bird can enjoy sitting on an electric line easily. But if a monkey swings on it so that it touches another parallel line, it gets killed instantly. Justify.
In an electric circuit, a battery and a bulb have been connected, and the battery consists of two cells of equal potential difference. If the bulb is not glowing, then which tests will you perform in order to find out the reason for the bulb not glowing?
Here is a simple diagram of an electric bell. At which points do the chemical energy to electrical energy conversion take place?
In which of the following circuits will the bulb glow the brightest? Given that all the cells used supply equal current.
In which of the figures will the bulb glow and why?
The filament of a bulb connected in a circuit is broken. Which of the following statements is true?
When a switch is in OFF position,
(i) circuit starting from the positive terminal of the cell stops at the switch.
(ii) circuit is open.
(iii) no current flows through it.
(iv) current flows after some time.
Choose the correct answer from the following-
Three bulbs A, B and C are connected in a circuit as shown in the figure. When the switch is 'ON' :
Aaradhya made an electric circuit using a cell holder, is switch and a bulb. When she put the switch in the ‘On’ position, the bulb did not glow. Help Aaradhya in identifying the possible defects in the circuit. Explain briefly.
Complete the crossword puzzle given below.
Across
1. A _____ circuit is required for the flow of current.
2. A safety device used in electric circuits.
3. This is a temporary magnet.
5. Material that lets electric current to pass through it.
7. Unit of electric current.
8. Electric bell works on the _____ effect of current
Down
1. A source of electric current.
4. Heating element of electric iron is made up of this alloy.
6. Device used to measure electric current
