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In 5V circuit has two 2 Ohm resistors in parallel, what is the current passing through each resistor?

To solve this question we need to remember the equation "Voltage = Current x Resistance". The next step is to draw out the circuit. A 5V circuit means the battery is supplying 5V to the current. Tw...
MR
Answered by Mia R. • Physics tutor
11244 Views

A kettle is found to output 65J when its input energy is 100J. What is the efficiency of the kettle, and what happens to the rest of the energy?

Efficiency=useful energy /input energy x 100, so for the kettle, efficiency = 65/100 x 100 = 65% efficient. The rest of the energy is wasted as heat energy in the kettle/sound energy.
JL
Answered by Joshua L. • Physics tutor
22945 Views

What is red shift?

Red shift is the lengthening ('stretching') of the wavelength of electromagnetic radiation emitted from a body moving away from the observer. This process occurs as the EM radiation loses energy while it pas...
EJ
Answered by Elis J. • Physics tutor
4690 Views

At what angle does total internal reflection occur?

This question is to do with the refraction that occurs when a light ray hits a boundary between two media of different refractive index. We know that the relationship between the angle of incidence and angle...
AS
Answered by Alex S. • Physics tutor
5095 Views

Compare the wavelength, frequency and speed of an emitted and reflected microwave

A reflected microwave will have a decreased wavelength, increased frequency and same speed when compared to an emitted microwave.
PI
Answered by Paul I. • Physics tutor
4812 Views