Class 10 Science Chapter 11 Electricity
Question: The SI unit of electric current is ……….
Answer: Ampere
Question: The device used to measure electric current in a circuit is called ……….
Answer: Ammeter
Question: The rate of flow of electric charge is termed as ……….
Answer: Electric current
Question: The SI unit of electric resistance is ……….
Answer: Ohm
Question: The relationship between voltage, current, and resistance is given by ………. law.
Answer: Ohm’s
Question: In a series circuit, the total resistance is the ………. of individual resistances.
Answer: Sum
Question: When resistors are connected in parallel, the reciprocal of the equivalent resistance is equal to the ………. of the reciprocals of individual resistances.
Answer: Sum
Question: A device that opposes the flow of current in an electric circuit is called a ……….
Answer: Resistor
Question: The potential difference between two points in a circuit is measured using a ……….
Answer: Voltmeter
Question: The unit of potential difference is ……….
Answer: Volt
Question: The energy dissipated by a device per unit time is called its ……….
Answer: Electric power
Question: The formula to calculate electric power is ……….
Answer: P=VIP = VI
Question: The SI unit of electric power is ……….
Answer: Watt
Question: The commercial unit of electrical energy is ……….
Answer: Kilowatt-hour (kWh)
Question: The resistance of a conductor depends on its length, cross-sectional area, and ……….
Answer: Material
Question: When the length of a conductor is doubled, its resistance ……….
Answer: Doubles
Question: The resistance of a wire is inversely proportional to its ……….
Answer: Cross-sectional area
Question: When two resistors are connected in parallel, the current through each resistor is ……….
Answer: Different
Question: In a parallel circuit, the potential difference across each resistor is ……….
Answer: The same
Question: A fuse in an electric circuit is used to protect appliances from ……….
Answer: Overcurrent
Question: The heating effect of electric current is used in devices such as ……….
Answer: Electric heaters
Question: The formula for the heat produced in a resistor is given by ……….
Answer: H=I2RtH = I^2Rt
Question: In a parallel circuit, if one component fails, the other components ……….
Answer: Continue to work
Question: The resistance of a wire increases with ……….
Answer: Temperature
Question: A cell converts ………. energy into electrical energy.
Answer: Chemical
Question: The direction of conventional current is from the ………. terminal to the ………. terminal of a battery.
Answer: Positive, negative
Question: The equivalent resistance of three resistors connected in series is ………. than any individual resistance.
Answer: Greater
Question: The symbol for a resistor in a circuit diagram is ……….
Answer: Zigzag line
Question: The work done to move a unit charge from one point to another is known as ……….
Answer: Potential difference
Question: In a series circuit, if one component fails, the entire circuit ……….
Answer: Stops working
Question: The formula to calculate resistance in terms of resistivity is ……….
Answer: R=ρlAR = \rho \frac{l}{A}
Question: The property of a material that opposes the flow of electric current is called ……….
Answer: Resistivity
Question: The SI unit of resistivity is ……….
Answer: Ohm-meter
Question: The power dissipated in a resistor is directly proportional to the square of ……….
Answer: Current
Question: For a fixed voltage, if the resistance of a circuit increases, the current ……….
Answer: Decreases
Question: An electric motor converts electrical energy into ………. energy.
Answer: Mechanical
Question: The flow of electric charge through a conductor constitutes ……….
Answer: Electric current
Question: A 1 kWh unit of electricity is equal to ………. joules.
Answer: 3.6×1063.6 \times 10^6
Question: In a parallel circuit, the total resistance is always ………. than the smallest individual resistance.
Answer: Less
Question: A short circuit occurs when the live wire comes into contact with the ………. wire.
Answer: Neutral
Question: The device that stores electrical energy is called a ……….
Answer: Capacitor
Question: A resistor with high resistance allows ………. current to flow through it.
Answer: Less
Question: The resistance of a material increases with an increase in its ……….
Answer: Length
Question: The drift velocity of electrons is in the direction ………. to the conventional current.
Answer: Opposite
Question: A device that can measure both voltage and current is a ……….
Answer: Multimeter
Question: The efficiency of an electrical appliance is the ratio of useful power output to ………. power input.
Answer: Total
Question: An electric bulb converts electrical energy into ………. and ………. energy.
Answer: Light, heat
Question: The unit of electric charge is ……….
Answer: Coulomb
Question: A thin wire in a fuse melts when the current exceeds the ………. value.
Answer: Rated
Question: The resistance of an ideal voltmeter is ……….
Answer: Infinite
Question: A conductor with zero resistance is called a ……….
Answer: Superconductor
Question: The drift speed of electrons in a conductor is ………. compared to the speed of light.
Answer: Very small
Question: A higher gauge number indicates a ………. wire diameter.
Answer: Smaller
Question: In a circuit diagram, the symbol for a battery is represented as ……….
Answer: Alternating long and short parallel lines
Question: In an electric circuit, the direction of current is considered as the flow of ………. charges.
Answer: Positive
Question: The property of a material that allows it to conduct electricity is called ……….
Answer: Conductivity