Advertisements
Advertisements
Question
Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator
Advertisements
Solution
Generator.
All others are related to safety measures to avoid mishap due to electricity.
APPEARS IN
RELATED QUESTIONS
What do the following symbols mean in circuit diagrams?
Draw circuit symbols for
an open switch
What is a circuit diagram
Draw a circuit diagram to show how 3 bulbs can be lit from a battery so that 2 bulbs are controlled by the same switch the third bulb has its own switch.
Explain with the help of a labelled circuit diagram how you will find the resistance of a combination of three resistors, or resistance R1, R2 and R3, joined in parallel. Also mention how you will connect the ammeter and the voltmeter in the circuit when measuring the current in the circuit and the potential difference across one of the three resistors of the combination.
The accompanying figure shows some electrical appliances connected in a circuit in a house. Answer the following questions.
- By which method are the appliances connected?
- What must be the potential difference across individual appliances?
- Will the current passing through each appliance be the same? Justify your answer.
- Why are the domestic appliances connected in this way?
- If the T.V. stops working, will the other appliances also stop working? Explain your answer.
Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagrams.
Draw a neat diagram showing a closed electric circuit.
What is open circuit?
The unit of electrical power is _______.
Nowadays MCBs are used in homes, for stop the current in the circuit which suddenly increases.
What is the use of earthing wire?
______ is the device used to close or open an electric circuit.
In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit ______.
In the circuit shown, which switches (L,M or N) must be closed to light up the bulb?
Higher Order Question
A student made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb holder), and copper connecting wires. When he turned on the switch, the torch bulb did not glow at all. The student checked the circuit and found that all the wire connections were tight.
- What could be the possible reason for the torch bulb not glowing even when the circuit appears to be complete?
Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up
Which of the following a simple circuit must-have?
Fuse is
State whether true or false. If false, correct the statement.
Ammeter is connected in parallel in any electric circuit.
The wiring in a house consists of ______ circuits.
A device that is used to break an electric circuit is called ______.
The rate of flow of electric charges in a circuit is called ______.
What are the types of electric circuits?
In the following circuits (Figure), heat produced in the resistor or combination of resistors connected to a 12 V battery will be
 |
 |
 |
| (i) | (ii) | (iii) |
In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be
Choose the statement which is not correct in the case of an electric fuse.
Name the device used these days in place of electric fuses in electrical circuits.
Our body is a ______ of electricity.
Will the bulb glow in the circuit shown in the following figure? Explain.
Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.
Name the device which is used to measure the strength of the electric current in an electric circuit.
An electric motor rated 1100 W is connected to 220 V mains. Find:
- The current drawn from the mains,
- Electric energy consumed if the motor is used for 5 hours daily for 6 days.
- Total cost of energy consumed if the rate of one unit is 5.
How is Joule's law effect useful in electric circuits where fuse is used as a safety device?
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
