When a Coolidge tube is operated for some time it becomes hot. Where does the heat come from?

Consider an amplifier circuit using a transistor.The output power is several times greater than the input power.Where does the extra power come from?

Consider an amplifier circuit using a transistor.The output power is several times greater than the input power.Where does the extra power come from?

Assertion : When a current flows in the coil of a transformer then its core becomes hot. Reason : The core of transformer is made of softiron.

In a Coolidge tube, electrons strike the target and stop inside it. Does the target get more and more negatively charged as time passes?

When you push your bicycle up on an incline the potential energy of the bicycle and yourself increses. Where does this energy come from?

When we move from dark to light, we fail to see for some time but soon the visibility become normal. It is

When we move from dark to light, we fail to see for some time but soon the visibility become normal. It is

When we move from dark to light, we fail to see for some time but soon the visibility become normal. It is

In the Coolidge tube experiment, if the applied voltage is increased to three times, the short wavelength limit of continuous X- ray spectrum shift by 20 pm. What is the initial voltage (in kV) applied to the tube?

Consider a particle moving in simple harmonic motion according to the equation x=2.0cos(50pit+tan^-1 0.75) where x is in centimetre and t in second. The motion is started at t=0. a. When does the particle come to rest for the first time? B. When does the acceleration have its maximum magnitude for the first time? c. When does the particle comes to rest for the second time?