1️⃣ Which of the following is the SI unit of electric current? 🔌
- A. Volt
- B. Ampere
- C. Ohm
- D. Watt
Show Answer 🔽
✅ B. Ampere
2️⃣ What is the instrument used to measure electric current? 📟
- A. Voltmeter
- B. Galvanometer
- C. Ammeter
- D. Rheostat
Show Answer 🔽
✅ C. Ammeter
3️⃣ Ohm’s Law is expressed as: 📐
- A. V = I + R
- B. V = IR
- C. V = I/R
- D. V = R/I
Show Answer 🔽
✅ B. V = IR
4️⃣ If a 3A current flows through a wire for 5 seconds, total charge is: ⚡
- A. 8 C
- B. 10 C
- C. 15 C
- D. 20 C
Show Answer 🔽
✅ C. 15 C
5️⃣ What is the SI unit of resistance? ⚙️
- A. Ohm
- B. Volt
- C. Ampere
- D. Coulomb
Show Answer 🔽
✅ A. Ohm
6️⃣ Which of these is a good conductor of electricity? 🔋
- A. Plastic
- B. Wood
- C. Copper
- D. Rubber
Show Answer 🔽
✅ C. Copper
7️⃣ The device that opposes the flow of current is called: 🚫
- A. Ammeter
- B. Battery
- C. Resistor
- D. Capacitor
Show Answer 🔽
✅ C. Resistor
8️⃣ In a series circuit, the current is: 🔁
- A. Different in each component
- B. Same in all components
- C. Zero
- D. Maximum in the middle resistor
Show Answer 🔽
✅ B. Same in all components
9️⃣ In a parallel circuit, the voltage is: 🧾
- A. Different across each resistor
- B. Same across each resistor
- C. Zero
- D. Half of the series voltage
Show Answer 🔽
✅ B. Same across each resistor
🔟 What is the formula for power in terms of current and voltage? ⚡
- A. P = IV
- B. P = I + V
- C. P = V / I
- D. P = I²R
Show Answer 🔽
✅ A. P = IV
1️⃣1️⃣ What is the SI unit of electric potential difference? 🔋
- A. Ampere
- B. Volt
- C. Watt
- D. Ohm
Show Answer 🔽
✅ B. Volt
1️⃣2️⃣ Which instrument is used to measure potential difference? 📏
- A. Ammeter
- B. Voltmeter
- C. Rheostat
- D. Galvanometer
Show Answer 🔽
✅ B. Voltmeter
1️⃣3️⃣ Electric power is given by the formula: 🔌
- A. P = IV
- B. P = V/I
- C. P = I – V
- D. P = IR
Show Answer 🔽
✅ A. P = IV
1️⃣4️⃣ 1 kilowatt-hour is equal to how many joules? 🔥
- A. 360 J
- B. 3600 J
- C. 36000 J
- D. 3.6 x 106 J
Show Answer 🔽
✅ D. 3.6 x 106 J
1️⃣5️⃣ What is the resistance of a conductor if the current is 2A and voltage is 6V? 📐
- A. 3 Ω
- B. 12 Ω
- C. 4 Ω
- D. 1 Ω
Show Answer 🔽
✅ A. 3 Ω
1️⃣6️⃣ Resistance is measured in: ⚙️
- A. Ohm
- B. Volt
- C. Ampere
- D. Watt
Show Answer 🔽
✅ A. Ohm
1️⃣7️⃣ What does a fuse do in an electric circuit? 🧯
- A. Increases voltage
- B. Reduces current
- C. Breaks the circuit in case of overload
- D. Connects resistors
Show Answer 🔽
✅ C. Breaks the circuit in case of overload
1️⃣8️⃣ A combination where current is same but voltage divides: 🔁
- A. Series
- B. Parallel
- C. Both
- D. Neither
Show Answer 🔽
✅ A. Series
1️⃣9️⃣ The work done in moving 1 coulomb charge through 1 volt is: ⚡
- A. 1 Watt
- B. 1 Joule
- C. 1 Ohm
- D. 1 Ampere
Show Answer 🔽
✅ B. 1 Joule
2️⃣0️⃣ The current in a circuit is directly proportional to: 🔄
- A. Resistance
- B. Potential difference
- C. Time
- D. Heat
Show Answer 🔽
✅ B. Potential difference
2️⃣1️⃣ The resistance of a conductor depends on: 🔬
- A. Length
- B. Area of cross-section
- C. Material
- D. All of these
Show Answer 🔽
✅ D. All of these
2️⃣2️⃣ The heating effect of electric current is given by: 🔥
- A. H = I + R
- B. H = I²R
- C. H = V/R
- D. H = VR
Show Answer 🔽
✅ B. H = I²R
2️⃣3️⃣ What is the current if 10 coulombs pass through a wire in 2 seconds? ⏱️
- A. 5 A
- B. 10 A
- C. 20 A
- D. 2 A
Show Answer 🔽
✅ A. 5 A
2️⃣4️⃣ In a parallel circuit, total resistance is: ➖
- A. Equal to largest resistor
- B. Equal to smallest resistor
- C. More than any resistor
- D. Less than the smallest resistor
Show Answer 🔽
✅ D. Less than the smallest resistor
2️⃣5️⃣ What does the slope of V-I graph represent? 📊
- A. Current
- B. Voltage
- C. Resistance
- D. Power
Show Answer 🔽
✅ C. Resistance
2️⃣6️⃣ The unit of electric charge is: 💡
- A. Ampere
- B. Coulomb
- C. Volt
- D. Watt
Show Answer 🔽
✅ B. Coulomb
2️⃣7️⃣ When a resistor is added in series, total resistance: ➕
- A. Increases
- B. Decreases
- C. Becomes zero
- D. Remains unchanged
Show Answer 🔽
✅ A. Increases
2️⃣8️⃣ A voltmeter is connected in: 📐
- A. Series
- B. Parallel
- C. Diagonal
- D. None
Show Answer 🔽
✅ B. Parallel
2️⃣9️⃣ The work done in moving 5 C charge across 2 V is: ⚡
- A. 10 J
- B. 5 J
- C. 2.5 J
- D. 1 J
Show Answer 🔽
✅ A. 10 J
3️⃣0️⃣ Which one of these is a non-ohmic conductor? 🚫
- A. Copper wire
- B. Filament bulb
- C. Silver wire
- D. Aluminium
Show Answer 🔽
✅ B. Filament bulb
3️⃣1️⃣ Which quantity is measured in watts? 🔌
- A. Voltage
- B. Resistance
- C. Power
- D. Current
Show Answer 🔽
✅ C. Power
3️⃣2️⃣ The energy consumed by an appliance depends on: ⚡
- A. Power rating
- B. Time used
- C. Voltage supplied
- D. Both A and B
Show Answer 🔽
✅ D. Both A and B
3️⃣3️⃣ What is the power consumed if V = 220 V and I = 5 A? 🔋
- A. 1000 W
- B. 1100 W
- C. 2200 W
- D. 4400 W
Show Answer 🔽
✅ C. 1100 W
3️⃣4️⃣ Resistance of a wire increases with: 📏
- A. Decreasing length
- B. Increasing cross-sectional area
- C. Increasing length
- D. None of these
Show Answer 🔽
✅ C. Increasing length
3️⃣5️⃣ In Ohm’s law, the graph between V and I is: 📉
- A. Curved
- B. Parabola
- C. Straight line
- D. Hyperbola
Show Answer 🔽
✅ C. Straight line
3️⃣6️⃣ Electric fuse is based on: 🔥
- A. Magnetic effect
- B. Heating effect
- C. Chemical effect
- D. Electrostatic effect
Show Answer 🔽
✅ B. Heating effect
3️⃣7️⃣ 1 kWh = ___ Joules 🔢
- A. 3600
- B. 3.6 × 10⁵
- C. 3.6 × 10⁶
- D. 360
Show Answer 🔽
✅ C. 3.6 × 10⁶
3️⃣8️⃣ Heat produced in a wire depends on: 🔁
- A. Resistance
- B. Square of current
- C. Time
- D. All of these
Show Answer 🔽
✅ D. All of these
3️⃣9️⃣ Unit of energy used in household billing is: 🧾
- A. Watt
- B. Kilowatt-hour
- C. Joule
- D. Kilojoule
Show Answer 🔽
✅ B. Kilowatt-hour
4️⃣0️⃣ Which of these shows variable resistance? 🔄
- A. Rheostat
- B. Voltmeter
- C. Ammeter
- D. Fuse
Show Answer 🔽
✅ A. Rheostat
4️⃣1️⃣ The resistance of a conductor is inversely proportional to: ➖
- A. Voltage
- B. Current
- C. Area of cross-section
- D. Length
Show Answer 🔽
✅ C. Area of cross-section
4️⃣2️⃣ Which metal is commonly used in fuse wires? 🧯
- A. Iron
- B. Copper
- C. Tin-lead alloy
- D. Aluminium
Show Answer 🔽
✅ C. Tin-lead alloy
4️⃣3️⃣ A charge of 10C flows through a bulb in 5s. Current? ⚡
- A. 2 A
- B. 5 A
- C. 10 A
- D. 15 A
Show Answer 🔽
✅ A. 2 A
4️⃣4️⃣ The commercial unit of energy is: 📦
- A. Joule
- B. Kilojoule
- C. Kilowatt-hour
- D. Watt-hour
Show Answer 🔽
✅ C. Kilowatt-hour
4️⃣5️⃣ Electrical energy is converted to heat energy in: 🔥
- A. Generator
- B. Bulb
- C. Motor
- D. Heater
Show Answer 🔽
✅ D. Heater
4️⃣6️⃣ A device to control current in a circuit is: 🔁
- A. Voltmeter
- B. Ammeter
- C. Resistor
- D. Rheostat
Show Answer 🔽
✅ D. Rheostat
4️⃣7️⃣ The resistance of a 1 m wire is R. What will be the resistance of a 2 m wire of same material and thickness? 📏
- A. R/2
- B. 2R
- C. R
- D. 4R
Show Answer 🔽
✅ B. 2R
4️⃣8️⃣ Electric current is due to flow of: 🧲
- A. Protons
- B. Neutrons
- C. Electrons
- D. Ions
Show Answer 🔽
✅ C. Electrons
4️⃣9️⃣ SI unit of charge is: 📏
- A. Volt
- B. Coulomb
- C. Ohm
- D. Watt
Show Answer 🔽
✅ B. Coulomb
5️⃣0️⃣ Electric energy = ? 🔋
- A. Power × Current
- B. Voltage × Resistance
- C. Power × Time
- D. Current × Resistance
Show Answer 🔽
✅ C. Power × Time
5️⃣1️⃣ Power consumed by a device is 100 W and it runs for 10 hours. Energy used is: 🔋
- A. 1 kWh
- B. 1000 kWh
- C. 10 kWh
- D. 0.1 kWh
Show Answer 🔽
✅ D. 1 kWh
5️⃣2️⃣ What happens to total resistance when more resistors are added in parallel? ➕
- A. Increases
- B. Remains same
- C. Decreases
- D. Becomes infinite
Show Answer 🔽
✅ C. Decreases
5️⃣3️⃣ 1 coulomb of charge contains approximately how many electrons? 🔘
- A. 6.022 × 10²²
- B. 1.6 × 10⁻¹⁹
- C. 6.242 × 10¹⁸
- D. 9.1 × 10⁻³¹
Show Answer 🔽
✅ C. 6.242 × 10¹⁸
5️⃣4️⃣ A thick wire has ______ resistance compared to a thin wire. 🧵
- A. More
- B. Less
- C. Same
- D. Infinite
Show Answer 🔽
✅ B. Less
5️⃣5️⃣ Which of the following combinations gives maximum resistance? ⚙️
- A. Parallel
- B. Series
- C. Mixed
- D. None
Show Answer 🔽
✅ B. Series
5️⃣6️⃣ Which component ensures safety during short circuit? 🧯
- A. Capacitor
- B. Resistor
- C. Fuse
- D. Inductor
Show Answer 🔽
✅ C. Fuse
5️⃣7️⃣ Which factor does not affect resistance? ❌
- A. Temperature
- B. Material
- C. Shape
- D. Length
Show Answer 🔽
✅ C. Shape
5️⃣8️⃣ If two resistors of 4Ω and 6Ω are connected in series, total resistance is: ➕
- A. 10Ω
- B. 2.4Ω
- C. 1.5Ω
- D. 24Ω
Show Answer 🔽
✅ A. 10Ω
5️⃣9️⃣ What is the voltage across a 5Ω resistor carrying 2A current? 🔋
- A. 2.5 V
- B. 10 V
- C. 0.4 V
- D. 5 V
Show Answer 🔽
✅ B. 10 V
6️⃣0️⃣ What is the resistance if power is 100W and voltage is 200V? 🔌
- A. 2Ω
- B. 4Ω
- C. 400Ω
- D. 2.5Ω
Show Answer 🔽
✅ C. 400Ω
6️⃣1️⃣ More the resistance in a wire, the ______ the current. ⚠️
- A. Higher
- B. Lower
- C. Equal
- D. None
Show Answer 🔽
✅ B. Lower
6️⃣2️⃣ Power of an electric bulb is 60W. It operates for 5 hours. Energy consumed is: 🔋
- A. 300 kWh
- B. 0.3 kWh
- C. 3 kWh
- D. 0.03 kWh
Show Answer 🔽
✅ B. 0.3 kWh
6️⃣3️⃣ Which one has more resistance? 🧱
- A. Short wire
- B. Long wire
- C. Thick wire
- D. Silver wire
Show Answer 🔽
✅ B. Long wire
6️⃣4️⃣ Which of these is a poor conductor? 🚫
- A. Silver
- B. Iron
- C. Rubber
- D. Copper
Show Answer 🔽
✅ C. Rubber
6️⃣5️⃣ When current flows in a circuit, electrons move from: 🔁
- A. Positive to negative
- B. Negative to positive
- C. Both directions
- D. Stationary
Show Answer 🔽
✅ B. Negative to positive
6️⃣6️⃣ SI unit of electric energy is: ⚡
- A. Volt
- B. Ohm
- C. Joule
- D. Ampere
Show Answer 🔽
✅ C. Joule
6️⃣7️⃣ What type of graph does a non-ohmic device show? 📉
- A. Straight line
- B. Curved
- C. Zigzag
- D. Horizontal
Show Answer 🔽
✅ B. Curved
6️⃣8️⃣ Which is not a correct unit of power? ❌
- A. Watt
- B. kWh
- C. J/s
- D. HP
Show Answer 🔽
✅ B. kWh (It’s a unit of energy, not power)
6️⃣9️⃣ A resistor of 10Ω has 2A current. Heat in 5s? 🔥
- A. 200 J
- B. 100 J
- C. 300 J
- D. 400 J
Show Answer 🔽
✅ D. 400 J
7️⃣0️⃣ A conductor offers 1Ω resistance. 1A current flows. Voltage is: ⚙️
- A. 1V
- B. 0.5V
- C. 2V
- D. 10V
Show Answer 🔽
✅ A. 1V
7️⃣1️⃣ A bulb is rated 60W, 220V. What is its resistance? 💡
- A. 220 Ω
- B. 806.67 Ω
- C. 500 Ω
- D. 150 Ω
Show Answer 🔽
✅ B. 806.67 Ω
7️⃣2️⃣ If 3 resistors of 3Ω are connected in parallel, total resistance is: 🔁
- A. 1 Ω
- B. 9 Ω
- C. 6 Ω
- D. 2 Ω
Show Answer 🔽
✅ A. 1 Ω
7️⃣3️⃣ Which appliance uses heating effect of current? 🔥
- A. Air conditioner
- B. Geyser
- C. Electric bell
- D. Radio
Show Answer 🔽
✅ B. Geyser
7️⃣4️⃣ Which of the following obeys Ohm’s law? 📐
- A. Diode
- B. Filament bulb
- C. Electrolyte
- D. Metallic conductor
Show Answer 🔽
✅ D. Metallic conductor
7️⃣5️⃣ Which of these is not a conductor? 🚫
- A. Copper
- B. Aluminium
- C. Wood
- D. Silver
Show Answer 🔽
✅ C. Wood
7️⃣6️⃣ An electric cell produces: 🔋
- A. Heat
- B. Mechanical energy
- C. Electrical energy
- D. Nuclear energy
Show Answer 🔽
✅ C. Electrical energy
7️⃣7️⃣ Two resistors of 6 Ω and 3 Ω are in series. Total resistance? ➕
- A. 9 Ω
- B. 2 Ω
- C. 18 Ω
- D. 1 Ω
Show Answer 🔽
✅ A. 9 Ω
7️⃣8️⃣ Which part of the circuit breaks in overcurrent? ⚠️
- A. Resistor
- B. Switch
- C. Fuse
- D. Ammeter
Show Answer 🔽
✅ C. Fuse
7️⃣9️⃣ Which quantity is not needed to calculate power? ⚙️
- A. Voltage
- B. Current
- C. Resistance
- D. Time
Show Answer 🔽
✅ D. Time
8️⃣0️⃣ Which has more power consumption? 🔌
- A. 100W bulb
- B. 60W fan
- C. 200W heater
- D. 10W charger
Show Answer 🔽
✅ C. 200W heater
8️⃣1️⃣ What happens to power if current triples? 🔺
- A. Triples
- B. Becomes one-third
- C. Becomes 9 times
- D. Same
Show Answer 🔽
✅ C. Becomes 9 times
8️⃣2️⃣ Electric fuse has: 🔐
- A. High melting point
- B. Low resistance
- C. Low melting point
- D. High resistance
Show Answer 🔽
✅ C. Low melting point
8️⃣3️⃣ The SI unit of electric power is: ⚡
- A. Watt
- B. Volt
- C. Ampere
- D. Joule
Show Answer 🔽
✅ A. Watt
8️⃣4️⃣ One coulomb is equal to how many electrons? 🔢
- A. 1.6 x 10⁻¹⁹
- B. 6.022 x 10²³
- C. 1.6 x 10¹⁹
- D. 6.25 x 10¹⁸
Show Answer 🔽
✅ D. 6.25 x 10¹⁸
8️⃣5️⃣ A resistor converts electrical energy into: 🔁
- A. Light
- B. Heat
- C. Magnetic energy
- D. Mechanical energy
Show Answer 🔽
✅ B. Heat
8️⃣6️⃣ Which quantity is same in series circuit? 🔄
- A. Current
- B. Voltage
- C. Power
- D. Energy
Show Answer 🔽
✅ A. Current
8️⃣7️⃣ Fuse wire is made of: 🔥
- A. High resistance
- B. Low resistance
- C. High melting point
- D. Low melting point
Show Answer 🔽
✅ D. Low melting point
8️⃣8️⃣ A voltmeter is connected in: 🔋
- A. Series
- B. Parallel
- C. Either
- D. Diagonal
Show Answer 🔽
✅ B. Parallel
8️⃣9️⃣ One kilowatt = ? watts 📏
- A. 100 W
- B. 1000 W
- C. 10 W
- D. 1 W
Show Answer 🔽
✅ B. 1000 W
9️⃣0️⃣ Which of these is not an SI unit? 🚫
- A. Watt
- B. Volt
- C. Ohm
- D. Horsepower
Show Answer 🔽
✅ D. Horsepower
9️⃣1️⃣ A parallel circuit ensures: ⚡
- A. Same current in all devices
- B. Equal resistance
- C. Individual control of devices
- D. Reduced voltage
Show Answer 🔽
✅ C. Individual control of devices
9️⃣2️⃣ Resistance is directly proportional to: ➕
- A. Cross-section area
- B. Length of wire
- C. Voltage
- D. Time
Show Answer 🔽
✅ B. Length of wire
9️⃣3️⃣ Current is the rate of flow of: 🔁
- A. Heat
- B. Electrons
- C. Voltage
- D. Light
Show Answer 🔽
✅ B. Electrons
9️⃣4️⃣ Which device converts electrical energy to light? 💡
- A. Heater
- B. Bulb
- C. Motor
- D. Battery
Show Answer 🔽
✅ B. Bulb
9️⃣5️⃣ 1 ampere = __ coulomb/sec 📏
- A. 0.5
- B. 1
- C. 2
- D. 10
Show Answer 🔽
✅ B. 1
9️⃣6️⃣ Which unit is used for billing electricity? 💵
- A. Joule
- B. Ampere-hour
- C. Kilowatt-hour
- D. Watt
Show Answer 🔽
✅ C. Kilowatt-hour
9️⃣7️⃣ A thick wire has __ resistance than a thin wire. 📏
- A. More
- B. Less
- C. Same
- D. Double
Show Answer 🔽
✅ B. Less
9️⃣8️⃣ Unit of electric energy is: ⚡
- A. Volt
- B. Watt
- C. Kilowatt-hour
- D. Ohm
Show Answer 🔽
✅ C. Kilowatt-hour
9️⃣9️⃣ Resistance of a wire is 20Ω and current is 0.5A. Voltage? 🔌
- A. 5V
- B. 10V
- C. 15V
- D. 20V
Show Answer 🔽
✅ B. 10V
1️⃣0️⃣0️⃣ Current is measured using: 📟
- A. Voltmeter
- B. Ammeter
- C. Resistor
- D. Switch
Show Answer 🔽
✅ B. Ammeter
