Advertisements
Advertisements
Question
How many microamperes are there in 1 ampere?
Advertisements
Solution
1 ampere = 1,000,000 microamperes = `10^6` microamperes
APPEARS IN
RELATED QUESTIONS
A current of 4 A flows around a circuit for 10 s. How much charge flows past a point in the circuit in this time?
In 10 s, charge of 25 C leaves a battery, and 200 J of energy are delivered to an outside circuit a result.
What is the p.d. across the battery?
If the amount of electric charge passing through a conductor in 10 minutes is 300 C, the current flowing is:
(a) 30 A
(b) 0.3 A
(c) 0.5 A
(d) 5 A
In the circuit shown below, the voltmeter reads 10 V.
(a) What is the combined resistance?
(b) What current flows?
(c) What is the p.d. across 2 Ω resistor?
(d) What is the p.d. across 3 Ω resistor?
What happens to the other bulbs in a series circuit if one bulb blows off?
State the S.I. unit of current.
A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?
If a fuse contains a 5 A fuse wire and the voltage is 240 V, what is the maximum power (wattage) which may be taken from the circuit?
In a house there are 6 bulbs of 100 W each used for 4 hours a day, 4 bulbs of 60 W each used for 8 hours a day, an immersion heater of 2.5 kW used for 1 hour per day, and an electric iron of 800 W used for 2 hours per day. Calculate the cost of monthly electric bill for the month of April at the rate of 80 p 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.
Explain, why the potential difference across the terminals of a cell is more when the cell is not in use than it is when the cell is being used.
State the conditions for the flow of charge in a circuit from one point to the other.
A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.
What does the direction of current convey?
