A hand-turned electric generator has its outputs connected to a CRO. The CRO screen appears below:
In an experiment to demonstrate the photoelectric effect, it was found that when light with a frequency f and an intensity I was shone on the cathode, the voltage needed to completely stop the photoelectric current was V volts. The effect of increasing the incident light intensity shining on the cathode is that the voltage V needed to be:
The acceleration of a rocket being used to transport astronauts to the International Space Station is shown for the minutes just after launch:
Which graph most closely resembles the path taken by a projectile fired from the Earth’s surface, ignoring air friction?
One of the advantages of AC induction motors compared to other electric motors is that they:
The gravitational potential energy of an object near Earth’s surface is changed. This could be done by:
A cathode ray tube with a rotating paddle wheel turns when the cathode rays strike the paddles. This is evidence that cathode rays possess:
In which arrangement is the force on wire W the greatest in magnitude?
ensuring the net force on the object remains zero.
The maximum torque produced by a single-coil DC motor is 2.8 N m. This torque could be produced if the motor had 200 turns on the coil and:
Wire X and structure Y are shown in the illustrations below.
An ideal transformer has 4000 turns on the primary coil and 250 turns on the secondary coil. The input and output voltages for this transformer could be:
The concept of time dilation is a direct consequence of:
A gaseous planet expands and contracts in size while maintaining the same mass.
The wavelength of a photon of blue light is 540 nm. How much energy does this photon carry?