To produce electricity, a generator needs what kind of input?

a) a magnetic field

b) a moving rod

c) mechanical energy

d) electrical energy

A 3kw kettle boils water in 4 minutes. does this use more electrical energy than a 150w fridge left on for 1 hour?

The battery is now disconnected from the plates and the separation of the plates is doubled ( = 1.04 cm). What is the energy stored in this new capacitor?

About where is our solar system located within the milky way galaxy?

A brick is suspended above the ground at a height of 6.6 meters. it has a mass of 5.3 kg. what is the potential energy of the brick?

A box is dropped onto a conveyor belt moving at 4.0 m/s. If the coefficient of friction between the box and the belt is 0.40, how long will it take (in s) before the box moves without slipping

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?