Physics 3rd year exam 2

If the work done to transfer a charge of 3 coulombs across a conductor is 60 joule the potential difference across such a conductor will be ....................................?

• 180 V

• 20 V

• 1/20 V

• 63 V

• 21 V

• 32 V

• 27 V

• 37 V

Which graph represents the relationship between the potential difference applied to a copper wire and the resulting current in the wire at constant temperature .......................................?

• 
• 
• 
• 

If the length of a wire is doubled, it's electric resistivity will be ..................................?

• The same

• halved

• doubled

• increase four times

• 200

• 10

• 20

• 5

In the opposite figure the equivalent resistance of this combination of resistors is ..................................?

In the following circuit showing in figure resistor A has three times the resistance of resistor B therefore ..................................?

• The current though A is three times the current though B

• The current though B is three times the current though A

• The current though A is the same as the current though B

• The current though A is four times the current though B

Reading of voltmeter in shown figure is .....................................?

• 21 volt

• 15 volt

• 36 volt

• 51 volt

• Decrease ,

  Decrease ,

  Increase

• Constant ,

  Decrease ,

  Constant

• Decrease ,

  Decrease ,

  Decrease

• Decrease ,

  Increase ,

  Increase