Chpt 21 - Current and Charge

Question 1

What is Electric Current?

Answer 1

A flow of electric charge. (I)
—> Unit = Amps (A) = C / s

Question 2

What are the effects of an Electric Current?

Answer 2

• Heating Effect
• Magnetic Effect
• Chemical Effect

Question 3

What is Electric Charge?

Answer 3

The positive or negative charge on a particle. (Q)
—> Unit = Coulomb (C)

Question 4

What is the charge on an electron ?

Answer 4

1.6 x 10^-19

Question 5

Q = IT

Answer 5

Charge gone past = Steady current x Time

Question 6

What is Conventional Current?

Answer 6

conventional current flows from positive to negative ( even though electrons flow in opposite direction).

Question 7

What is Direct Current (d.c.)?

Answer 7

A current which flows in only one direction.

Question 8

What is Alternating Current (a.c.)?

Answer 8

A current which constantly changes direction.

Question 9

What is an Ammeter used for?

Answer 9

Measuring Direct Current.

Question 10

What is a Galvanometer used for?

Answer 10

Measuring small amounts of current.

Question 11

What is a series Circut?

Answer 11

A loop circut where current can only flow one way.

Question 12

What is a Parallel Circut?

Answer 12

A loop within a loop, where current can flow multiple ways.