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Electric Current

Each electric...

Question

Each electrical appliance is provided with a _______ core flexible cable. Fill in the blank.

A

3

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B

2

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C

1

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D

4

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Solution

The correct option is A 3
Each electrical appliance is provided with three (3) core flexible cables. The insulation on the three wires is of different colours i.e Brown for live wire, blue for neutral wire and green or yellow for earth wire.

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Similar questions

Fill in the blanks:

(a) The unit in which we pay the cost of electricity is ___

(b) The electrical energy consumed in a house is measured by ___

(c) In a household electrical circuit, the appliances are connected in ___ with the mains.

(d) A switch is connected to the ___ wire.

(e) The red colour insulated wire in a cable is the ___ wire.

(f) One kilowatt hour is equal to ___ joule.

(g) A fuse wire should have low ___.

Q. Fill in the blank with a suitable option:
I get an electrician to check all my electrical appliances every autumn whether or not _________________.

Earthing is provided for electrical appliances in a building to protect it from ______.

Q. The table below shows the current in three different electrical appliances when connected to the 240 V mains supply:

Appliance	Current
Kettle	08.5 A
Lamp	0.4 A
Toaster	4.8 A

(a) Which appliance has the greatest electrical resistance? How does the data show this?
(b) The lamp is connected to the mains supply by using a thin, twin-cored cable consisting of live and natural wires. State two reasons why this cable should not be used for connecting the kettle to the mains supply.
(c) Calculate the power rating of the kettle when it is operated from the 240 V mains supply.
(d) A main takes the kettle abroad where the mains supply is 120 V. What is the current is the kettle when it is operated from the 120 V supply?

Q. A cable TV provider

A

, charges each customer

$ 120

for installation, plus

$ 25

per month for cable programming. It's competitor ,

B

, charges each customer

$ 60

for installation, plus

$ 35

per month for cable programming. Find the number of months for which a customer who signs up with cable provider

A

pays so that he will pay the same total amount for cable TV as a customer who signs up with cable provider

B

after the same number of months.

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