1.
Electric current is the rate of flow of: A) Energy B) Charge C) Mass D) Force
2.
The SI unit of electric current is: A) Volt B) Ohm C) Ampere D) Coulomb
3.
One ampere is equal to: A) 1 C/s B) 1 J/C C) 1 V/A D) 1 Ω
4.
Electric current is measured using: A) Voltmeter B) Galvanometer C) Ammeter D) Ohmmeter
5.
The direction of conventional current is: A) Electron to proton B) Negative to positive C) Positive to negative D) Random
6.
The charge of an electron is: A) 1.6 × 10⁻¹⁹ C B) 1.6 × 10⁻¹⁸ C C) 9.1 × 10⁻³¹ C D) 6.02 × 10²³ C
7.
Current in metallic conductors is due to the flow of: A) Protons B) Neutrons C) Electrons D) Ions
8.
Potential difference is measured in: A) Ampere B) Volt C) Ohm D) Watt
9.
A voltmeter is connected: A) In series B) In parallel C) In both ways D) Across battery only
10.
Resistance is measured in: A) Volt B) Coulomb C) Ohm D) Tesla
11.
Ohm’s law is represented by: A) P = VI B) V = IR C) E = mc² D) Q = It
12.
The graph between V and I for an ohmic conductor is: A) Circular B) Hyperbolic C) Straight line D) Parabolic
13.
The reciprocal of resistance is: A) Conductance B) Resistivity C) Current D) Voltage
14.
The SI unit of conductance is: A) Ohm B) Siemens C) Henry D) Farad
15.
Resistance of a conductor depends upon: A) Length B) Area C) Material D) All of these
16.
Resistance is directly proportional to: A) Area B) Length C) Voltage D) Current
17.
Resistance is inversely proportional to: A) Length B) Resistivity C) Area D) Current
18.
The formula for resistance is: A) R = ρL/A B) R = AL/ρ C) R = V/I² D) R = IA
19.
The SI unit of resistivity is: A) Ω m B) Ω/m C) A/m D) V/m
20.
A material with very low resistivity is called: A) Insulator B) Semiconductor C) Conductor D) Dielectric
21.
Silver is: A) Poor conductor B) Best conductor C) Semiconductor D) Insulator
22.
Nichrome is commonly used in: A) Transformers B) Heating elements C) Motors D) Batteries
23.
The resistance of metallic conductors generally: A) Decreases with temperature B) Increases with temperature C) Remains constant D) Becomes zero
24.
The resistance of semiconductors: A) Increases with temperature B) Decreases with temperature C) Remains constant D) Becomes infinite
25.
Electrical energy is converted into heat according to: A) Newton’s law B) Joule’s law C) Faraday’s law D) Coulomb’s law
26.
Joule’s law of heating is: A) H = VIt B) H = I²Rt C) Both A and B D) H = IR
27.
Electric power is: A) Work done per unit charge B) Charge per unit time C) Energy consumed per unit time D) Resistance per unit length
28.
SI unit of power is: A) Joule B) Watt C) Volt D) Ohm
29.
One watt is equal to: A) 1 J/s B) 1 C/s C) 1 V/C D) 1 A/s
30.
Electric power can be calculated by: A) P = VI B) P = I²R C) P = V²/R D) All of these
31.
A kilowatt-hour is a unit of: A) Power B) Energy C) Voltage D) Current
32.
1 kWh equals: A) 3.6 × 10⁶ J B) 3600 J C) 1000 J D) 36 J
33.
Cells connected in series increase: A) Current capacity B) Voltage C) Resistance D) Power loss
34.
Cells connected in parallel increase: A) Voltage B) EMF C) Current capacity D) Resistance
35.
EMF stands for: A) Electro Magnetic Force B) Electromotive Force C) Electric Motion Factor D) Electro Motion Field
36.
The unit of EMF is: A) Ohm B) Ampere C) Volt D) Watt
37.
Internal resistance exists: A) Outside battery B) Inside battery C) In wires only D) In resistors only
38.
Terminal voltage is less than EMF when: A) No current flows B) Current flows C) Resistance is zero D) Battery removed
39.
Kirchhoff’s first law is based on conservation of: A) Energy B) Momentum C) Charge D) Mass
40.
Kirchhoff’s second law is based on conservation of: A) Charge B) Energy C) Mass D) Force
41.
In a series circuit, current is: A) Different everywhere B) Same throughout C) Zero D) Infinite
42.
In a parallel circuit, voltage is: A) Same across branches B) Different everywhere C) Zero D) Infinite
43.
Equivalent resistance in series is: A) Sum of resistances B) Product of resistances C) Reciprocal sum D) Difference
44.
Equivalent resistance in parallel is: A) Sum B) Product C) Reciprocal rule D) Difference
45.
Two 4 Ω resistors in series give: A) 2 Ω B) 4 Ω C) 8 Ω D) 16 Ω
46.
Two 4 Ω resistors in parallel give: A) 2 Ω B) 4 Ω C) 8 Ω D) 16 Ω
47.
Drift velocity refers to: A) Speed of light B) Average velocity of charge carriers C) Velocity of waves D) Velocity of atoms
48.
Drift velocity is directly proportional to: A) Electric field B) Resistance C) Area D) Length
49.
Current density is: A) I/A B) IA C) V/I D) RA
50.
SI unit of current density: A) A/m² B) A/m C) C/m² D) V/m
51.
A fuse is connected: A) Parallel B) Series C) Across load D) Across battery
52.
Fuse wire should have: A) High melting point B) Low resistance C) Low melting point D) High conductivity only
53.
The purpose of earthing is: A) Increase voltage B) Safety C) Increase current D) Reduce power
54.
Copper is widely used in house wiring because of: A) High resistance B) High conductivity C) High density D) High melting point
55.
Superconductors have: A) Infinite resistance B) High resistance C) Zero resistance D) Variable resistance
56.
The critical temperature is associated with: A) Conductors B) Superconductors C) Insulators D) Semiconductors
57.
A galvanometer detects: A) Large currents B) Small currents C) Voltage D) Resistance
58.
An ammeter has: A) High resistance B) Infinite resistance C) Low resistance D) Medium resistance
59.
A voltmeter has: A) High resistance B) Low resistance C) Zero resistance D) Variable resistance
60.
The SI unit of electric charge is: A) Volt B) Coulomb C) Watt D) Ohm
61.
Current through a conductor increases if: A) Voltage increases B) Resistance increases C) Length increases D) Area decreases
62.
The device used to measure EMF accurately is: A) Potentiometer B) Ammeter C) Ohmmeter D) Fuse
63.
The commercial unit of energy is: A) Joule B) Watt C) kWh D) Volt
64.
Electrical conductivity is reciprocal of: A) Voltage B) Resistivity C) Current D) Charge
65.
The SI unit of conductivity is: A) S/m B) Ωm C) A/m D) V/m
66.
The heating effect of current depends upon: A) I² B) R C) t D) All of these
67.
Electric bulb filament is usually made of: A) Copper B) Aluminum C) Tungsten D) Iron
68.
Tungsten is used because of: A) Low melting point B) High melting point C) Low density D) High resistance only
69.
A resistor opposes: A) Voltage B) Current flow C) Charge D) Energy
70.
Current is a: A) Scalar quantity B) Vector quantity C) Tensor D) None
71.
The resistance of an ideal conductor is: A) Infinite B) Very high C) Zero D) One
72.
Battery converts: A) Mechanical energy to electrical B) Chemical energy to electrical C) Electrical to heat D) Light to electrical
73.
The unit of electric potential is: A) Volt B) Ohm C) Ampere D) Coulomb
74.
Ohmic conductors obey: A) Newton’s law B) Ohm’s law C) Boyle’s law D) Hooke’s law
75.
Resistance of a wire doubles when: A) Length doubles B) Area doubles C) Resistivity halves D) Current doubles
76.
A short circuit causes: A) Small current B) Large current C) No current D) Constant current
77.
The SI unit of EMF is: A) Joule B) Coulomb C) Volt D) Watt
78.
A battery of 12 V provides: A) 12 J/C B) 12 C/J C) 12 A D) 12 W
79.
Current density vector points: A) Opposite to current B) Along current C) Randomly D) Perpendicular to current
80.
The relation between charge and current is: A) I = Qt B) I = Q/t C) Q = Vt D) Q = IR
81.
If 10 C passes in 2 s, current is: A) 2 A B) 5 A C) 10 A D) 20 A
82.
The SI unit of resistance is named after: A) Ampere B) Ohm C) Faraday D) Tesla
83.
A good insulator has: A) High conductivity B) Low resistivity C) High resistivity D) Zero resistance
84.
The energy consumed by a 100 W bulb in 10 h is: A) 1 kWh B) 10 kWh C) 0.1 kWh D) 100 kWh
85.
The filament lamp glows due to: A) Magnetic effect B) Heating effect C) Chemical effect D) Photoelectric effect
86.
An ideal voltmeter draws: A) Large current B) Small current C) No current D) Infinite current
87.
The SI unit of power is named after: A) Ohm B) Watt C) Coulomb D) Tesla
88.
Electric current produces: A) Magnetic effect B) Heating effect C) Chemical effect D) All of these
89.
The resistance of a wire decreases when: A) Length decreases B) Area decreases C) Resistivity increases D) Length increases
90.
The battery symbol’s longer line represents: A) Negative terminal B) Positive terminal C) Resistance D) Current
91.
Potential difference is work done per unit: A) Mass B) Energy C) Charge D) Force
92.
The SI unit of resistivity is: A) Ω m B) Ω C) S/m D) A/m²
93.
Current in electrolytes is due to: A) Electrons only B) Ions C) Protons D) Neutrons
94.
A rheostat is used to: A) Measure current B) Measure voltage C) Vary resistance D) Measure power
95.
The current in a closed circuit is maximum when: A) Resistance is maximum B) Resistance is minimum C) Voltage is zero D) Circuit is open
96.
A conductor with larger cross-sectional area has: A) Greater resistance B) Lower resistance C) Infinite resistance D) Same resistance
97.
The unit of current is named after: A) Coulomb B) Faraday C) Ampere D) Ohm
98.
Electrical appliances in homes are connected in: A) Series B) Parallel C) Mixed only D) Series-parallel always
99.
The efficiency of a conductor is highest when: A) Resistance is low B) Resistance is high C) Current is zero D) Voltage is zero
100.
Current electricity mainly deals with: A) Stationary charges B) Moving charges C) Magnetic poles D) Waves
A
Answer Key
1-B, 2-C, 3-A, 4-C, 5-C, 6-A, 7-C, 8-B, 9-B, 10-C
11-B, 12-C, 13-A, 14-B, 15-D, 16-B, 17-C, 18-A, 19-A, 20-C
21-B, 22-B, 23-B, 24-B, 25-B, 26-C, 27-C, 28-B, 29-A, 30-D
31-B, 32-A, 33-B, 34-C, 35-B, 36-C, 37-B, 38-B, 39-C, 40-B
41-B, 42-A, 43-A, 44-C, 45-C, 46-A, 47-B, 48-A, 49-A, 50-A
51-B, 52-C, 53-B, 54-B, 55-C, 56-B, 57-B, 58-C, 59-A, 60-B
61-A, 62-A, 63-C, 64-B, 65-A, 66-D, 67-C, 68-B, 69-B, 70-A
71-C, 72-B, 73-A, 74-B, 75-A, 76-B, 77-C, 78-A, 79-B, 80-B
81-B, 82-B, 83-C, 84-A, 85-B, 86-C, 87-B, 88-D, 89-A, 90-B
91-C, 92-A, 93-B, 94-C, 95-B, 96-B, 97-C, 98-B, 99-A, 100-B