Question

FILL UP
1.____a_____ is anegative charged particle
2.proton is deflected toward the ____b____ charged plate
3.the device used to detect and measure electric charges is____c____
4.the flow of current requires a ______d_____

Answer 1

A. Electron

B. Negative

C. Electroscope

D. Clsed circuit/ conducting path / flow of charges...

Hope it's helpful to u.