Questions from College Physics

Q: 1. An electric current is induced in a conducting loop by

1. An electric current is induced in a conducting loop by all but one of these processes. Which one does not produce an induced current? (a) rotating the loop so that it cuts across magnetic field lin...

Q: 1. For an ac circuit, graphs (1, 2

1. For an ac circuit, graphs (1, 2) could represent: (a) the (1-voltage, 2-current) for a capacitor. (b) the (1-current, 2-voltage) for a capacitor. (c) the (1-voltage, 2-current) for a resistor. (d)...

Q: 1. The speed of an electromagnetic wave in vacuum depends on

1. The speed of an electromagnetic wave in vacuum depends on (a) the amplitude of the electric field but not on the amplitude of the magnetic field. (b) the amplitude of the magnetic field but not on...

Q: A glass prism bends a ray of blue light more than a

A glass prism bends a ray of blue light more than a ray of red light since its index of refraction is slightly higher for blue than for red. Does a diverging glass lens have the same focal point for b...

Q: At t = 0, the wave pulses shown are moving toward

At t = 0, the wave pulses shown are moving toward each other on a string. The wave speed is 20 m/s. Use the principle of superposition to sketch the shape of the string at t = 2.0 ms.

Q: A study was done observing the ability of the eye to rapidly

A study was done observing the ability of the eye to rapidly rotate in order to follow a moving object by placing contact lenses that contain accelerometers on a subject’s eye. The eyeball has radius...

Q: A square loop of wire with side 0.60 m carries

A square loop of wire with side 0.60 m carries a current of 9.0 A as shown in the side-view diagram. When there is no applied magnetic field, the plane of the loop is horizontal and the nonconducting,...

Q: What is the difference between a virtual and a real image?

What is the difference between a virtual and a real image? Describe a method for demonstrating the presence of a real image.

Q: Explain why there is a phase difference between the current in an

Explain why there is a phase difference between the current in an ac circuit and the potential difference across a capacitor in the same circuit.

Q: A mica sheet 1.00 µm thick is suspended in air

A mica sheet 1.00 µm thick is suspended in air. In reflected light, there are gaps in the visible spectrum just at 450, 525, and 630 nm. Calculate the index of refraction of the mica sheet.