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10Electric power is the amount of energy transformed by an appliance in 1 second.
A 100 W bulb converts more electrical energy per second than a 60 W bulb.
The potential difference across an appliance has no effect on its power.
Power can be calculated using the formula P=IV.
The current in a device is independent of its power rating.
Electrical energy is always completely converted into light in a bulb.
A rice cooker of 900 W connected to a 220 V circuit draws 4.09 A of current.
The higher the resistance of a device, the lower the current for a given voltage.
Power is measured in joules per second, which is also called a watt.
Appliances with the same power rating transform different amounts of energy per second.
Percentage: 0%
220 V, 0.5 A is written on bulb A and 220 V, 0.45 A on bulb B. Which of the following statements is true when both bulbs are working at their full capacity?
How much electric energy is transformed when 1 kW heater is used for 1 hour?
The electric power of a device is equal to:
If a 100 W bulb and a 60 W bulb are connected to the same voltage, which one uses more energy per second?
The unit of electric power is:
A 220 V, 900 W rice cooker draws current of:
Which of the following is not an energy transformation of electric appliances?
Power can also be expressed in terms of current and resistance as:
If the power of an appliance is doubled while voltage remains the same, the current will:
A fully functional appliance converting more energy per second is the one with:
The unit of electric power is ______.
______ power is calculated using the formula P = IV.
The energy transformed by an appliance in 1 second is equal to its ______.
A 60 W bulb converts ______ joules of energy in 1 second.
The ______ drawn by an appliance is calculated as I = P/V.
The potential difference across a device is denoted by ______.
Electric energy is converted into other forms like ______, light, or sound by appliances.
If an appliance has higher power, it converts ______ energy per second.
The ______ in moving charge through an appliance is given by W = Q × V.
A fan rated 75 W connected to a 220 V supply draws 0.34 A ______.