Electric Switch

Q.

What are the different types of insulators?

Q.

What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.

Q.

Switches, electrical plugs and sockets are made up of conductors.

1. Conductors

2. Insulators

Q.

Who Did This? (Change Into Passive)

Q.

A device that can make or break a circuit is called as ______.

1. switch

2. reflector

3. fuse

4. cell

Q.

Electricity can pass through a thermocol.

1. True
2. False

Q.

Name a device that regulates the electric current in a circuit?

Q.

State two precautions that you must take when switching on an electric circuit.

Q.

In which of the following devices is a permanent magnet not used?

1. Electric motor

2. Telegraph

3. Generators

4. Particle accelerators

Q.

Which of the following precautions need not be taken while using electric gadgets/appliances/circuits? (a) We should never touch a lighted electric bulb connected to the mains. (b) We should never experiment with the electric supply from the mains or a generator or an inverter. (c) We should never use just any wire or strip of metal in place of a fuse. (d) We should never turn the switch in the ON position.

1. We should never touch a lighted electric bulb connected to the mains.

2. We should never experiment with the electric supply from the mains or a generator or an inverter.

3. We should never use just any wire or strip of metal in place of a fuse.

4. We should never turn the switch in ON position.

Q. What does the above symbol represent?

1. Resistance
2. Bulb
3. Battery
4. Fan

Q. Why are switches not connected to neutral wire?

1. Because there will be overheating
2. No current will flow through the appliance
3. Fuse will blow
4. All

Q.

A circuit diagram represents the arrangements of electrical components in an electric circuit.

1. True
2. False

Q.

Define the term.

Switch.

Q.

A device that breaks the circuit or completes it is known as:

1. Electric torch

2. Electric current

3. Electric cell

4. Electric switch

Q. Pick the gadget(s) that have electric switches built into them.

1. Table lamp
2. Television
3. All of the above
4. Torch

Q.

To operate a filament bulb or an electric fan, we can use a bell switch.

1. True

2. False

Q. Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?

Q. _________ is an on-off device for current in a circuit (or an appliance). Fill in the blank.

1. MCB
2. Switch
3. Socket
4. Plug

Q. A device that is used to break an electric circuit is called ..........

Q.

MARK THE STATEMENT AS TRUE OR FALSE

Key is an arrangement of making or breaking a circuit.

1. True
2. False

Q.

Pick the gadget(s) that have electric switches built in them.

1. Torch

2. Refrigerators

3. Television

4. All of these

Q.

When live wire and neutral wire come in direct contact, it leads to

1. Short-circuiting

2. Earthing

3. Stoppage of electric current

4. None of these

Q.

Why is a series arrangement not used for connecting domestic electrical appliances?

Q.

Which of these switches is a momentary switch which breaks the circuit when the external pressure is removed?

1. One way switch

2. Two way switch

3. Double-pole switch

4. Bell switch

Q. What is electric pressure

Q. Joystick switches are used in

1. Cars
2. Toys
3. House circuit
4. Alarms

Q.

Recognize the following type of the switch,

1. It is a two way switch.

2. It is a press button switch.

3. It is a single pole switch.

4. It is a double pole switch.

Q.

"A closed switch allows current to flow through it".

1. True

2. False

Q.

In the push button switch, ___

1. the continuous pressure has to be applied to stop the flow of current.

2. the current flows in the circuit when the pressure is removed from the switch.

3. the current flows in the circuit when it is pressed.

4. the current flows in the circuit when the pressure is removed from the switch.