2. A BATTERY CONSISTS OF FIVE DRY CELLS CONNECTED IN SERIES. IF THE VOLTAGE DEVELOPED BY EACH CELL IS 1.5 V,THE TOTAL VOLTAGE DEVELOPED BY THE BATTERY IS
A- 0.3 V.
B- 1.5 V.
C- 5.0 V.
D- 7.5 V.
3. THE GRID IN A HIGH-VACUUM TRIODE IS USUALLY KEPT NEGATIVELY CHARGED WITH RESPECT TO THE CATHODE SO THAT THE ELECTRONS MAY BE
A- ACCELERATED TOWARD THE ANODE.
B- ACCELERATED TOWARD THE CATHODE
C- ATTRACTED TO THE ANODE INSTEAD OF THE GRID.
D- ATTRACTED TO THE CATHODE INSTEAD OF GRID.
4. AN EXAMPLE OF AN ATOM THAT HAS NO CHARGE IS ONE THAT HAS
A- 2 PROTONS, 2 ELECTRONS, AND 1 NEUTRON.
B- 1 PROTON, 2 ELECTRONS, AND 3 NEUTRONS.
C- 3 PROTONS, 1 ELECTRON, AND 3 NEUTRONS.
D- 3 PROTONS, 2 ELECTRONS, AND 1 NEUTRON.
2007-02-11 07:48:25 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Look in your book
2007-02-11 08:09:57 · answer #1 · answered by wanna_be_md 3 · 0⤊ 0⤋
Im pretty sure number two is D and number four is A. Im not so sure about number three necause if the cathode is positive then because the grids are negative the electron(negatively charged) would be attraceted to the the poctively charged cathode. So i think the answer is C. Im not so sure about this one but i am sure about 2 and 4. Good luck!
2007-02-11 16:02:10 · answer #2 · answered by lvlorph 2 · 0⤊ 0⤋
D 7.5 V. You add voltages if they are in series.
D The flow of electrons is always from anode–to–cathode . The grid is strongly negative to keep the electrons away.
A. Protons and electrons need to match for a no-charge atom.
the number of neutrons does not matter, because they have no charge.
2007-02-11 16:03:54 · answer #3 · answered by PH 5 · 0⤊ 0⤋
Here's what I THINK the answers are:
2. D
3. A
4. C
Hope it's right...I'm not sure, though...(I can't really help too much, because I still need help with my homework that I need to get done.) Good luck!
2007-02-11 15:53:22 · answer #4 · answered by Dee 6 · 0⤊ 0⤋