Advertisements
Advertisements
Question
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
Options
Protect the user from electric shock by short circuiting and consequently
breaking the circuit.Prevent the fuse from burning out.
Protect the iron.
Complete the electrical circuit to the iron.
Allow the current to get away.
Advertisements
Solution
Protect the user from electric shock by short circuiting and consequently
breaking the circuit.
APPEARS IN
RELATED QUESTIONS
Choose the correct alternative and rewrite the following sentence.
When the resistance of a conductor increases, the current will ________ increase.
What is an electric current?
How many electrons are flowing per second past a point in a circuit in which there is a current of 5 amp?
A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is:
An electric oven is rated as 1.5 kW, 250 V. If it is connected to a 250 V mains, calculate the
(a) Current drawn,
(b) Energy consumed in 20 hours,
(c) Cost of energy consumed in 20 hours at the rate of Re. 1 per unit.
A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:
(i) The resistance of the wire, and
(ii) The heat energy produced in 1 minute.
One unit of electrical energy consumed is equal to 1000 kilowatt-hour.
Calculate the current in a wire if a charge of 1500 coulomb flows through it in 5 minutes.
