Physics
Grade-9
Easy
Question
The power of an appliance is
- The amount of voltage going through it
- The amount of energy transferred per second
- The amount of charge that passes through per second
- None of the above
Hint:
Power is the rate at which energy is transferred or converted.
The correct answer is: The amount of energy transferred per second
- Every appliance has a power rating, usually given in watts (W) or kilowatts (kW) .
- This is the amount of electricity it needs in order to work
Related Questions to study
Physics
One horsepower is equal to
One horsepower is equal to
PhysicsGrade-9
Physics
A body of mass 10 kg moving at the height of 2 m, with a uniform speed of 4 m/s. Its total energy is
A body of mass 10 kg moving at the height of 2 m, with a uniform speed of 4 m/s. Its total energy is
PhysicsGrade-9
Physics
The power by the centripetal force for a body moving in a circular path in 10 s is
The power by the centripetal force for a body moving in a circular path in 10 s is
PhysicsGrade-9
Physics
The power rating of a carbon-composition resistor that is to handle up to 1.2 Joule per second should be
The power rating of a carbon-composition resistor that is to handle up to 1.2 Joule per second should be
PhysicsGrade-9
Physics
A load uses 2 W of power in 10 s. The work done by the power supply is approximately
A load uses 2 W of power in 10 s. The work done by the power supply is approximately
PhysicsGrade-9
Physics
A half-watt is equal to how many milliwatts?
A half-watt is equal to how many milliwatts?
PhysicsGrade-9
Physics
What is the relation between power and time taken?
What is the relation between power and time taken?
PhysicsGrade-9
Physics
What is the relation between power and work?
What is the relation between power and work?
PhysicsGrade-9
Physics
____ is the unit of energy.
____ is the unit of energy.
PhysicsGrade-9
Physics
The net resistance in this circuit will
The net resistance in this circuit will
PhysicsGrade-9
Physics
Some students have connected three lamps in a parallel circuit.
The children predict what will happen if they unscrew lamp 2. Which of the predictions is correct?
Some students have connected three lamps in a parallel circuit.
The children predict what will happen if they unscrew lamp 2. Which of the predictions is correct?
PhysicsGrade-9
Physics
The light intensity is ____ for all lamps in the circuit.
The light intensity is ____ for all lamps in the circuit.
PhysicsGrade-9
Physics
Each lamp has _____ path for the electric current to flow through it from the battery.
Each lamp has _____ path for the electric current to flow through it from the battery.
PhysicsGrade-9
Physics
Which of these is a series connection?
Which of these is a series connection?
PhysicsGrade-9
Physics
In our homes and businesses, electrical appliances are connected in parallel with the main source of electricity. What problem does this avoid?
In our homes and businesses, electrical appliances are connected in parallel with the main source of electricity. What problem does this avoid?
PhysicsGrade-9
