Advertisements
Advertisements
Question
Write down the formula which relates electric charge, time and electric current
Advertisements
Solution
If a charge of Q coulombs flows through a conductor in time t seconds, the magnitude, I of the electric current flowing through it is given by:
`I=Q/t`
APPEARS IN
RELATED QUESTIONS
Which of the two is connected in series : ammeter or voltmeter?
Two resistors of 2.0 Ω and 3.0 Ω are connected (a) in series (b) in parallel, with a battery of 6.0 V and negligible internal resistance. For each case draw a circuit diagram and calculate the current through the battery.
The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.


Tick(✓) the correct choice in the following:
When the length of a conductor is doubled the resistance of the conductor
will
Find the effective resistance in the following circuit diagrams (Fig.):

Find the effective resistance in the following circuit diagrams (Fig.):

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.
Name the principle on which a transformer works.
State whether the following statement is True or False:
The SI unit of charge is the coulomb.
What should I choose ___________________
b. for getting protection from electric current.
c. to measure the current in the circuit?
Two electric bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to electric mains of 220 V. Find the current drawn by the bulbs from the mains.
State the conditions for the flow of charge in a circuit from one point to the other.
Unit of electric power may also be expressed as
Problems for practice:
If 5A current flows through a circuit, then convert the current in terms of microampere?
The number of electrons constituting a 1-coulomb charge is ______.
