Class 10th Electricity MCQs
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Which of the following is the SI unit of electric charge?
- a) Ampere
- b) Coulomb
- c) Volt
- d) Ohm
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Electric current is the flow of:
- a) Atoms
- b) Electrons
- c) Neutrons
- d) Protons
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Which instrument is used to measure electric current?
- a) Voltmeter
- b) Ammeter
- c) Ohmmeter
- d) Thermometer
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The potential difference between two points is measured in:
- a) Ohms
- b) Watts
- c) Amperes
- d) Volts
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Which of the following represents Ohm’s Law?
- a) V = IR
- b) I = VR
- c) R = VI
- d) P = VI
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If the resistance in a circuit increases, the current will:
- a) Increase
- b) Decrease
- c) Stay the same
- d) Be zero
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In a series circuit, the current is:
- a) Different at different points
- b) Same through each component
- c) Zero
- d) Infinite
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In a parallel circuit, the voltage across each component is:
- a) Different
- b) Zero
- c) Same
- d) Half of the total voltage
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The resistance of a conductor is directly proportional to:
- a) Its length
- b) Its area of cross-section
- c) The current flowing through it
- d) The voltage across it
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Which of the following has the highest resistivity?
- a) Copper
- b) Aluminum
- c) Nichrome
- d) Silver
-
Electrical power is the product of:
- a) Voltage and current
- b) Current and resistance
- c) Voltage and resistance
- d) Voltage and charge
-
The unit of electrical power is:
- a) Joule
- b) Watt
- c) Coulomb
- d) Volt
-
Which device is used to measure electrical energy consumed in a circuit?
- a) Voltmeter
- b) Ammeter
- c) Wattmeter
- d) Energy meter
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The power consumed by a device with a current of 2 A and a voltage of 220 V is:
- a) 110 W
- b) 220 W
- c) 440 W
- d) 880 W
-
The energy consumed by a 100 W bulb in 2 hours is:
- a) 200 J
- b) 720000 J
- c) 200 Wh
- d) 7200 Wh
-
Which of the following is a good conductor of electricity?
- a) Rubber
- b) Glass
- c) Copper
- d) Wood
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A device used to break or complete an electric circuit is called:
- a) Resistor
- b) Switch
- c) Battery
- d) Capacitor
-
Which of the following components is used to limit the current in a circuit?
- a) Capacitor
- b) Resistor
- c) Inductor
- d) Diode
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A fuse wire is made of:
- a) High resistivity material
- b) Low resistivity material
- c) High conductivity material
- d) Insulating material
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The unit of resistance is:
- a) Ampere
- b) Volt
- c) Ohm
- d) Watt
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In a series circuit, if one component fails, the others:
- a) Will also fail
- b) Will continue to work
- c) Will short circuit
- d) Will increase resistance
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In a parallel circuit, if one component fails, the others:
- a) Will also fail
- b) Will continue to work
- c) Will short circuit
- d) Will decrease resistance
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In a series circuit with three resistors, the total resistance is:
- a) The sum of the individual resistances
- b) The product of the individual resistances
- c) The average of the individual resistances
- d) Zero
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In a parallel circuit with three resistors, the total resistance is:
- a) The sum of the individual resistances
- b) The product of the individual resistances
- c) Less than the smallest resistance
- d) Equal to the largest resistance
-
If the voltage across a parallel circuit is 12 V, the voltage across each resistor is:
- a) 12 V
- b) 6 V
- c) 4 V
- d) Depends on the resistance
-
Kirchhoff's Current Law (KCL) states that:
- a) The total voltage in a circuit is zero
- b) The sum of currents entering a junction equals the sum of currents leaving the junction
- c) The total resistance in a series circuit is constant
- d) The voltage across a parallel circuit is the same
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Kirchhoff's Voltage Law (KVL) states that:
- a) The total current in a circuit is constant
- b) The sum of the voltages around a closed loop is zero
- c) The sum of currents entering a junction equals the sum of currents leaving the junction
- d) The total resistance in a parallel circuit is zero
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According to KCL, if 2 A enters a junction and 1.5 A leaves the junction, the remaining current is:
- a) 0.5 A entering
- b) 0.5 A leaving
- c) 2.5 A entering
- d) 2.5 A leaving
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According to KVL, if the voltage drops in a closed loop are 5 V, 3 V, and 2 V, the total voltage supplied must be:
- a) 5 V
- b) 10 V
- c) 7 V
- d) 8 V
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In a circuit, the sum of currents entering a junction is 3 A. If two currents of 1 A and 0.5 A leave the junction, the remaining current must be:
- a) 2 A entering
- b) 1.5 A leaving
- c) 2 A leaving
- d) 1.5 A entering
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A device that automatically stops the flow of electricity in a circuit during a fault is called:
- a) Resistor
- b) Capacitor
- c) Fuse
- d) Battery
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Which of the following is used for the protection of appliances from overcurrent?
- a) Resistor
- b) Fuse
- c) Capacitor
- d) Inductor
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The rating of a fuse wire is related to:
- a) Voltage
- b) Current
- c) Power
- d) Resistance
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A circuit breaker is:
- a) A manual switch to turn on/off the circuit
- b) An automatic switch that stops the current in case of a fault
- c) A device to measure current
- d) A device to store charge
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Earthing is provided in electrical appliances to:
- a) Protect from overload
- b) Prevent electric shocks
- c) Increase efficiency
- d) Reduce power consumption
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Electricity is generated in power stations using:
- a) Chemical energy
- b) Thermal energy
- c) Mechanical energy
- d) All of the above
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The function of an electric meter is to measure:
- a
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