Fill in the blank: The SI unit of power is ___ and it is equivalent to one joule per second. | Card: 1 / 28 |
Power can be expressed as P = I^2R, where P is power in watts, I is current in amperes, and R is resistance in ohms. | Card: 6 / 28 |
What is the relationship between power, current, and potential difference in an electrical circuit? | Card: 7 / 28 |
The relationship is given by the formula P = VI, where P is power in watts, V is the potential difference in volts, and I is the current in amperes. | Card: 8 / 28 |
Fill in the blank: When a current of 1 ampere flows through a circuit with a potential difference of 1 volt, it consumes ___ watt. | Card: 9 / 28 |
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True or False: The electricity bill reflects the amount of energy consumed needed to keep the electrons flowing in the circuit. | Card: 15 / 28 |
The resistance of the filament of the bulb is calculated using the formula R = V^2/P. | Card: 18 / 28 |
Fill in the blank: The safe limit of the current through the filament of the bulb can be calculated using the formula I = ___ / V. | Card: 19 / 28 |
The electrical energy consumed by an appliance can be calculated as Energy in kWh = Power in kW x time in h. If power is given in watts, the formula becomes ___ . | Card: 21 / 28 |
True or False: The amount of heat produced in a wire decreases with an increase in current. | Card: 23 / 28 |
False. The amount of heat produced increases with an increase in current, as H ∝ I^2. | Card: 24 / 28 |
Fill in the blank: The cost of electricity is determined by multiplying the energy consumed in kWh by the ___ . | Card: 25 / 28 |
If an appliance uses 2000 W of power for 3 hours, how much energy does it consume in kWh? | Card: 27 / 28 |






