Advertisements
Advertisements
Question
<p> Define the unit of electric current (or Define ampere).
Advertisements
Solution
The SI unit of electric current is ampere.
When one coulomb of charge flows through any cross-section of a conductor in one second, the electric current flowing through it is said to be one ampere.
1 ampere= `(1coulomb)/(1second)`
APPEARS IN
RELATED QUESTIONS
1 A = _________ mA
- 102
- 103
- 10-3
- 10-6
Which of the following units could be used to measure electric charge?
(a) ampere
(b) joule
(c) volt
(d) coulomb
Which of the following equation shows the correct relationship between electrical unit?
1A = 1C/s or 1c= 1A/s
What is the unit of electric current?
In 10 s, charge of 25 C leaves a battery, and 200 J of energy are delivered to an outside circuit a result.
What current flows from the battery?
The p.d. across a 3 Ω resistor is 6 V. The current flowing in the resistor will be:
(a) `1/2A`
(b) 1 A
(c) 2 A
(d) 6 A
Christmas tree lamps are usually wired in series. What happens if one lamps breaks?
Draw a circuit diagram showing two lamps, one cell and a switch connected in series.
How can you change the brightness of the lamp?
How does the heat H produced by a current passing through a fixed resistance wire depend on magnitude of current I?
Define the term resistivity.
Three resistors of 6.0 𝛀, 2.0𝛀 and 4.0𝛀 are joined to an ammeter A and a cell of e.m.f. 6.0 V as
shown in fig 8.52 Calculate:
(a) the effective resistance of the circuit and
(b) the reading of ammeter.
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the press in 16 hours.
A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly
Electric current passes through a metallic conductor due to the movement of ______.
The number of electrons constituting a 1-coulomb charge is ______.
