Current Electricity
Test Your Knowledge on Current Electricity
Welcome to the Current Electricity quiz! This engaging quiz is designed to test your understanding of key concepts in electrical currents, resistance, and potential difference.
Get ready to challenge yourself with questions like:
- What is the unit of current?
- How does a rheostat fun
ction? - What does Ohm's Law state?
The unit of current is _____________.
ampere
Watt
Volt
coulomb
The potential difference required to pass a current 0.2 A in a wire of resistance 20W is ____.
100 V
4 V
.01 V
40 V
The resistance of an electric bulb drawing 1.2 A current at 6.0 V is___________.
5 Ω
0.2 Ω
2 Ω
0.5 Ω
The unit of resistivity is ____________.
ohm
ohm / m
ohm-m
mho
Two resistances of 100 W and zero ohm are connected in parallel. The overall resistance will be
100 W
50 W
25 W
zero ohm
What is the rate of flow of electric charges called?
Electric potential
electric conductance
Electric current
none of these
Which instrument is used for measuring electric potential?
Ammeter
galvanometer
voltmeter
potentiometer
When one unit electric charge moves from one point to another point in an electric circuit, then the amount of work done in joules is known as?
Electric current
electric resistance
electric conductance
potential difference
The resistance of a conductor is directly proportional to:
Its area of cross-section
density
melting point
Length
The purpose of a rheostat is:
Increase the magnitude of current only
Decrease the magnitude of current only
Increase or decrease the magnitude of current
None of these
Point to be kept in mind for verification of Ohm’s Law is:
Ammeter and voltmeter should be connected in series
Ammeter should be connected in series and voltmeter in parallel
Ammeter should be connected in parallel and voltmeter in series
Ammeter and voltmeter should be connected in parallel
When a 40V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. Find the value of the resistance of the resister:
5000 Ω
800 Ω
0.8 Ω
none of these
A battery of 6V is connected in series with resisters of 0.1 ohm , 0.15 ohm,0.2 ohm,0.25 ohm and 6 ohm. How much current would flow through each resistor?
0.895A
2.22A
1A
none of these
Which of the following statements does not represent ohm's law?
Current / potential difference=constant
Potential difference / current=constant
Potential difference=urrent x resistance
Current=resistance x potential difference
The hindrance presented by material of conductor to the smooth passing of electric current is known as:
Resistance
Conductance
Inductance
None of these
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