Summary
Summary Electric fields mind map
- Course
- Institution
Key concepts of unit 4 A2 physics
[Show more]
Seller
Follow
careyneale2005
Content preview
combinations-• + + Q- =
- t - = t
• Q+ + Qt = Qt
(t) forces are repulsive Electrostatic fields obeys inverse
(-) forces are attractive square law and has infinitely
ranged forces.
Electric fields only deal with charge.
coulombs law: An electron is placed
Force of attraction between two point charges Q1 and Q2 is: Electrostatic Forces A p-d of 100 volts is a
can be of force acting on
- proportional to the product of two charges (F α Q1 Q2] • repulsive V-100 r= 10
- Inversely proportional to the square of the distance between charges (F α ½] • attractive Uniform Electric Fields- E- ¥
• can be created using plates of a capacitor. = 100 ÷ (10×10
EQUATIONS: • Field strength depends on separation of plates and
Example Question- potential difference between them.
É:? E-E
Find resultant force acting on Pdueto A and B. 1 Q2 E = Y
: acm P -lanc Include magnitude
4TEO r² UTEO T2
Electric Fields v
Ve = ' 2 E-E (VECTOR)
and direction! PETE r
som UTEO T
EF W-GAVE 9=9.0×109
+12:? Electric field strength (E) is the force per unit charge (NC-1)
A-P: Electric Potential- • field lines for Qt- • field lines for Q-
F =/9×109/(8×10-9) (6×10-9) = 5.3×10-5N • The electric potential, Ve, at a
A
(9×10-212 distance r from a charge Q is the positive = outwards negative = inwards
P→B: work done per unit charge in bringing t -
FB= (9×109) (6×10-9) (12×10-9) = 26×10-SN a positive charge from infinity to r
(5×10-2) 2 in an electric field. (SCALAR)
FB
E
magnitude- • Field strength between positive and negative charges:
26×10-5
(26×10-512 + (s-3×10-512
Viko ♀ "¥
of
FA EF = 27×10-SN potential difference =
5. 3×10-5
O-tan-' 26×10-s work done per unit charge
5. 3×10-5 Qt -
0=78-5. V21 repulsion (t)
v2-I att traction (-)
• Field strength between two negative charges
Two trend lines as we consider (tor)
direction due to repulsion and attraction. field
Q- Q-
EF
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller careyneale2005. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.91. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
60434 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now