FILL IN THE BLANKS 1)When a positively charged metal touches an electroscope, electrons transfer from ______. 2)Charging by ________________ is when two materials are brought into contact. 3)Charging by ________________ is when two materials are rubbed together.

What are the uses of ionic instruments?

what the need of testing insulators in the laboratory ?

Types and uses of laser

Question 1a Which is necessary for electrons to flow from the negatively charged portion of the solar panel to the positively charged portion of the panel? Pick one answer and explain why. A) permit B) circuit C) diode D) charge controller   Question 1b. Which of the following is not a factor that affects how much power a solar panel will produce? Pick one answer and explain. A) the size of the panel B) the reflective coating on the panel C) the air temperature D) the relative humidity   Question 1c. Which of the following is the rating on a solar panel that indicates the theoretical maximum voltage a panel can produce when measured under standard test conditions? Pick one answer and explain why. A) maximum power (Pmax) B) maximum power voltage (Vmp) C) open circuit voltage (Voc) D) short circuit voltage (Isc)

LEDs produce light by using ____________. Fill in the blank   solar energy electrical energy magnetic energy diode energy

With a second .01-µF capacitor. Remove the jumper from points A and B. Carefully discharge C1 insert the second capacitor (C2)in series with C1 Insert a jumper between points A and B and note the charge time of C1and C2in series.The Charge time was approximately how many seconds? Since the charge time has decreased to ____________________ the value it was withonly C1 in the circuit, it may be concluded that the total capacitance has (increased ordecreased)?   the new RC time is (double or half)?  the original and the R has not been changed, we concludethat the new total capacitance is how _____µF.

How to make a semiconductor to become a P-type material? Explain briefly your answer in one(1) sentence.

What factors determine the amount of voltage produced by a cell?

A semiconductor is a material that has _____ energy band gap. a)no b)wide c)narrow d)nuclear