Rectifiers. Determination of the parameters of low frequency alternating current pulses - Medical Physics -

Consider the alternating current (Fig. 3). What fraction of its period (T) does it take to reach from zero to half of its amplitude?(hint: sin300=1/2)

What particles are the electric current carriers (charge carriers) in metals?

For the photoelectric effect to take place, the wavelength (λ) of the incident light must satisfy the following inequality: Where: ɸ is the minimum energy needed to remove an electron from metal (work function); h is Plank constant.

Electric current is measured in units of amps (A) which represent the following rate of change:

Alternating current (AC):

The Oscilloscope measures and displays the relationship between two variables, input (y-axis) andreference (x-axis). Choose the correct pair:

The current carriers inside vacuum tubes are:

The term ”charge carrier” refers to

The term ”elementary charge“ refers to

If across 25Ohm resistor is applied 50V (DC) how many Amperes is the current that will flow:

What happens to the current (DC) in metallic conductor, if the voltage is doubled?

Ohm’s Law states that the magnitude of the electric current is proportional to the applied voltage and inversely proportional to the resistance in the conducting material. Choose one:

For Ohmic load in a DC circuit, what would be the change in power consumption if the voltage is halved?(hint: in Ohmic circuits the ratio V/I = constant, and power = V·I) a. It will double

What is the resistance in a load if, when 120 V are applied, it draws a current of 20 Amps:

Metals are good conductors of electricity because:

A 400 Ohm resistor draws 0.05 A direct current. What is the voltage across the resistor