Electricity

Question 1

What is electric current?

Question 2

What is potential difference?

Question 3

What is the emf of a source?

Question 4

What is resistance?

Question 5

What is Ohm’s Law?

Question 6

What is the resistance of an ideal ammeter?

Question 7

What is the resistance of an ideal voltmeter?

Question 8

Why is the I-V characteristic for a filament lamp curved?

Question 9

What are the I-V characteristics for resistors, filament lamps and diodes?

Question 10

What is the resistivity of an object?

Question 11

How does the resistance of a metal conductor vary with temperature and why?

Question 12

How does the resistance of a thermistor vary with temperature and why?

Question 13

How does the resistance of a superconductor vary with temperature?

Question 14

What are some applications of superconductors?

Question 15

What is the calculation for resistivity?

Question 16

How does the resistivity of a conductor work?

Question 17

How does the resistivity of an insulator work?

Question 18

How does the resistivity of a semi-conductor work?

Question 19

What is Kirchhoff’s Current Law and how does it relate to the conservation of charge?

Question 20

What is Kirchhoff’s Voltage Law and how does it relate to the conservation of charge?

Question 21

What is a potential divider?

Question 22

What is a potentiometer?

Question 23

How does the resistance of an LDR vary with light intensity?

Question 24

What is the internal resistance of a source of emf?

Question 25

What is the terminal pd?

Question 26

What are the lost volts?

Question 27

What is the resultant emf and internal resistance of a series of identical cells connected in series?

Question 28

What is the resultant emf and internal resistance of a series of identical cells connected in parallel?