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Q 1. The conventional direction of current is from
the positive terminal to the negative terminal
the negative terminal to the positive terminal
the conductor to the resistance in the series
the battery to the conductor
Q 2. Potential difference between two points of a wire carrying 5 ampere current is 0.5 volt. The resistance between these two points is
0.5 ohm
0.1 ohm
0.2 ohm
10 ohm
Q 3. If the five equal pieces of a resistance wire having 5  resistance each is connected in parallel, then their equivalent resistance will be _________.
1 Ω
1/5 Ω
5 Ω
25 Ω
Q 4. Electric charges from two bodies at different potentials flow from __________ to  
higher temperature, lower temperature
higher potential, lower potential
lower potential, higher potential
zero potential, unity potential
Q 5. The potential difference of a circuit is constant. If the resistance of a circuit is doubled, then its current will become;
2 I
I/2
I
4 I
Q 6. Which of the following terms does not represent electrical power in a circuit?
IR2
VI
I2R
V2/R
Q 7. An electric circuit has a 30 V battery and a resistor of 90 ohm. Then, the current in the circuit will be:
0.11 A
0.33 A
1.30 A
30 A
Q 8. What would be the effect on the current if the resistance is increased while the voltage remained constant?
Current would increase.
Current would increase exponentially.
Current would decrease.
Current would remain constant.
Q 9. The combined resistance of 6Ω and 12Ω connected in parallel is
2 Ω
4 Ω
18 Ω
6 Ω
Q 10. The resistance of one conducting wire is 10. How much electric current will flow by connecting it with a battery of 1.5 V?
150 mA
15 mA
1.5 mA
0.15 mA
Q 11. The resistivity of a wire:
varies with its length
varies with its cross section
varies with its mass
is independent of length, cross section and mass of the wire.
Q 12. Two light bulbs P and Q are identical in all respects, except that P's filament is thicker than Q's. If the same potential difference is applied to each, then
P will burn brighter because it has the greater resistance.
Q will burn brighter because it has the greater resistance.
P will burn brighter because it has the lower resistance.
Q will burn brighter because it has the lower resistance.
Q 13. If the diameter of a wire is doubled, then the resistance becomes ________ .
One-fourth
Four times
Halved
Twice
Q 14. Electric current will stop flowing when the potential difference is
High
Low
Zero
Infinity
Q 15. According to Ohm’s law,
The resistance and current both increase with the increase in voltage.
The current increases with the increase in voltage.
The resistance increases with the increase in voltage.
The resistance increases with the increase in current.
Q 16. What does an electric fuse work on?
Heating effect of electric current
Chemical effect of electric current
Magnetic effect of electric current
None of the above
Q 17. Find the potential difference across the resistor, when 125 J of heat is produced each second in a 5 ohm resistor.
20 V
28 V
25 V
30 V
Q 18. The unit of resistivity can be expressed as ________.
Ω-m2
Ω-m
Ω/m
m/Ω
Q 19. If the resistance is ____________, then the current gets doubled.
Halved
doubled
one-fourth
thrice the original value
Q 20. The quantity which is denoted by joule/coulomb is
Electric current
Potential difference
Electric energy
Electric charge
Q 21. A bulb draws a current of 0.20 A for 15 minutes. What is the amount of electric charge that flows through it?
182 C
180 C
200 C
300 C
Q 22. If the potential difference across the ends of a conductor is doubled, then the current flowing through it gets
quadrupled
halved
doubled
tripled
Q 23. If the resistance is increased by four times its original value, then the current
is halved
becomes one-fourth
is tripled
is four times the initial value
Q 24. In a conductor, 6.25 × 1016 electrons flow from its end A to B in 2 s. Find the current flowing through the conductor ( e = 1.6 × 10 -19 C).
5 mA
5 A
0.5 A
0.5 mA
Q 25. Commercial unit of electric energy is
watt
Kilowatt-hour
joule
volt
Q 26. The resistance of a conductor is said to be 1 ohm if
1 ampere of current flows through it when the potential difference across the ends is 1 volt
1 ampere of current flows through it when the potential difference across the ends is 0
0 ampere current flows through it when the potential difference across the ends is 1 volt
1 ampere of current flows through it when the potential difference across the ends is 10 volt
Q 27. The potential difference across a conductor is 14 V. If it carries a current of 3.5 A, calculate the resistance of the conductor.
2 Ω
4 Ω
1.33 Ω
1 Ω
Q 28. The SI unit of electric charge is ________.
Coulomb
Watt
Volt
Q 29. According to Ohm’s law, if the graph of voltage versus current is drawn, then the nature of the graph is a
curve
straight line
parabola
hyperbola
Q 30. 1 μA is equal to
10-3 A
10-6 A
10-2 A
10-9 A
Q 31. The SI unit of current is denoted by  
Am
mA
A
F
Q 32. The SI unit of potential difference is
volt
coulomb
watt
ampere
Q 33. Which of the following statement is true about the direction of electric current?
The conventional direction of electric current is from positive terminal to the negative terminal of a cell, through the outer circuit.
The conventional direction of electric current is from negative terminal to positive terminal of a cell, through the outer circuit.
The actual flow of electrons is from the positive terminal to negative terminal of a cell.
The actual flow of electrons is in the same direction as that of the conventional current.
Q 34. Two resistors when connected in parallel give resultant value of 2 ohm, when connected in series the value becomes 8 ohm, the resistance of each resistor is
4Ω, 4Ω
2Ω, 6Ω
7Ω, 1Ω
5Ω, 3Ω
Q 35. If the current passing through a heater is halved, then the heat produced by it becomes
H/4
H/2
2H
4H
Q 36. The resistance of a conductor increases with- I: Increase in length II: Increase in volume III: Decrease in area
I or II
I or III
II only
III only
Q 37. Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is
16 Ω
4 Ω
12 Ω
20 Ω
Q 38. Conducting wire of uniform cross-sectional area 2 cm2 and length 1 cm carries a current of 8 A produced by an electric field of 2 Volt/cm. The resistivity of the material of the wire is:
0.5 Ωm
0.5 Ωcm
0.05 Ωm
0.05 Ωcm
Q 39. Which of the physical quantity has been attributed with the unit of kWh?
Electric power       
Work  
Electric potential
Electric current
Q 40. Which effect is utilised by an electric bulb?
Magnetic effect
Chemical effect
Heating effect
Power effect


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