Advertisements
Advertisements
Question
By what name is the physical quantity coulomb/second called?
Advertisements
Solution
The electric current is the physical quantity that is expressed as coulomb/second since current, I = Q/t.
APPEARS IN
RELATED QUESTIONS
What is an 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 is the p.d. across the battery?
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?
An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
The circuit diagram given below shows the combination of three resistors R1, R2 and R3:
Find :
(i) total resistance of the circuit.
(ii) total current flowing in the circuit.
(iii) the potential difference across R1.
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
Complete the following sentence:
A fuse is a short piece of wire of high ......... and low
Define the following:
Electromotive force
Complete the following table. The first answer has been given as an example
| Quantity | Unit |
|
(a) Electrical potential Volt ( b) Resistance ( c) Power ( d) Energy ( e) Resistivity |
Volt ........ .......... ............ .............. |
What is the purpose of fuse in an electrical circuit?
Study the following circuit and find out:
(i) Current in 12 Ω resistor.
(ii) The difference in the readings of A1 and A2, if any.
Name any two devices, which are working on the heating effect of the electric current.
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
