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WorksheetsPhysics
Total questions: 40
Worksheet time: 20mins
1. Electric current is the flow of:
A) Protons
B) Neutrons
C) Electrons
D) Atoms
2. The SI unit of electric current is:
A) Volt
B) Ampere
C) Ohm
D)Coulomb
3. 1 Ampere is equal to:
A) 1 C/s
B) 1 J/s
C) 1 V/s
D) 1 W/s
4. Ohm's law is given by:
A) V = IR
B) I = VR
C) R = IV
D) V = I/R
5. If a current of 2A flows through a wire for 5 seconds, the charge passed is:
A) 2 C
B) 5 C
C) 10 C
D) 0.4 C
6. The resistance of a conductor depends on:
A) Length
B) Area of cross-section
C) Material
D) All of the above
7. The resistivity of a wire is , its length is 2 m and cross-sectional area is . What is its resistance?
A. 0.034 Ω
B. 0.017 Ω
C. 0.85 Ω
D. 1.7 Ω
8. Which instrument is used to measure current?
A) Voltmeter
B) Ammeter
C) Galvanometer
D) Thermometer
9. The resistance of a wire increases with:
A) Decrease in length
B)Increase in cross-section
C) Increase in length
D) Cooling
10. In a metallic conductor, current is due to:
A) Free electrons
B) Protons
C) Holes
D) Ions
11. The potential difference between two points is 12 V and resistance is 3 Ω. Current is:
A) 4 A
B) 36 A
C) 0.25 A
D) 9 A
12. The electric current in a circuit is directly proportional to:
A) Resistance
B) Voltage
C) Power
D) Energy
13. Which of the following is a good conductor?
A) Glass
B) Wood
C) Copper
D) Rubber
14. Power in an electric circuit is given by:
A) VI
B) V/I
C) I/V
D) VR
15. Unit of electrical energy is:
A) Watt
B) Volt
C) Joule
D) Ohm
16. 1 kWh is equal to:
A) 1000 J
B) 3600 J
C) 3600000 J
D) 100 J
17. In series connection, total resistance is:
A) Sum of individual resistances
B) Product of resistances
C) Inverse sum
D)
Zero
18. In parallel connection, total resistance is:
A) More than largest resistance
B) Less than smallest resistance
C) Zero
D) Same
19. Which material is commonly used in fuse wires?
A) Copper
B) Aluminium
C) Lead-tin alloy
D) Si
lver
20. Which quantity remains constant in a series circuit?
A) Current
B) Voltage
C) Power
D) Energy
21. A resistor of 10 ohms carries a current of 2 A. The power dissipated is:
A) 5 W
B) 20 W
C) 40 W
D) 0.2 W
22. Voltage is measured using:
A) Voltmeter
B) Ammeter
C) Resistor
D) Galvanometer
23. Which law states that current is directly proportional to voltage?
A) Newton’s Law
B) Coulomb’s Law
C) Ohm’s Law
D) Faraday’s Law
24. What is the resistance of a 60 W, 240 V bulb?
A) 960 Ω
B) 480 Ω
C) 9600 Ω
D) 1440 Ω
25. The electric fuse works on the principle of:
A) Magnetic effect of current
B). Chemical effect
C). Heating effect
D). Electric shock
26. The heating effect of current is given by:
A) I²R
B) IR²
C) V²R
D) V/R
27. Which of the following has the least resistance?
A) Long wire
B) Thin wire
C) Thick wire
D) Nichrome wire
28. A current of 5 A flows for 2 minutes. Total charge passed is:
A) 300 C
B) 600 C
C) 10 C
D). 1200C
29. The direction of conventional current is:
A) Opposite to electron flow
B) Same as electron flow
C) Random
D) Circular
30. The device that converts chemical energy to electrical energy is:
A) Transformer
B) Battery
C) Resistor
D) Fuse
31. What is the resistance of a wire if 2 A current flows under 10 V?
A) 0.2 Ω
B) 20 Ω
C) 5 Ω
D) 0.5 Ω
32. The resistance of a conductor increases with:
A) Decrease in temperature
B) Increase in temperature
C) Constant temperature
D) None
33. Which is a non-ohmic conductor?
A) Nichrome
B) Filament lamp
C) Copper
D) Silver
34. Electric current in a vacuum is due to:
A) Protons
B) Ions
C) Electrons
D) Neutrons
35. The resistance of an ideal voltmeter is:
A) Zero
B) Low
C) Infinite
D) 1 Ω
36. The resistance of an ideal ammeter is:
A) Zero
B) Infinite
C) 1 ohm
D) 100 ohms
37. 1 volt =
A) 1 joule/coulomb
B) 1 coulomb/joule
C) 1 watt/second
D) 1 ohm/ampere
38. Energy consumed in an appliance depends on:
A) Time
B) Power
C) Voltage
D) Both A and B
39. A parallel circuit is preferable in homes because:
A) Voltage varies
B) Current is same
C) Appliances can be used independently
D) All of the above
40. Which material has nearly zero resistance at very low temperatures?
A) Conductor
B) Superconductor
C) Insulator
D) Semiconductor
