Potential Difference, emf and Energy

How must a voltmeter be connected?

• In series

• In parallel

• To a power supply

Which of these is not another name for voltage

• Potential Difference

• Electromotive Force

• Flow of charge

What is the energy given off by a 20V bulb which has 10C passing through it?

• 200J

• 2J

• 0.5J

• 250J

When lighting happen,25 C charge is transferred from could to the ground and 1.25x10¹⁰ J energy is produced. Calculate the potential difference within cloud and the ground in unit Volt

• 4.00 x 10⁸

• 2.00 x 10⁸

• 3.00 x 10⁸

• 5.00 x 10⁸

Calculate the potential difference if the work done by 10 coulombs of charge is 50 joules

• 500 V

• 5 V

• 0.5 V

What is the correct equation?

• potential difference = charge / time taken

• potential difference = work done / charge

• potential difference = work done / time taken

• potential difference = time taken / charge

How much work is done in moving a charge of 3C across two points having a potential difference of 12 V.

• 4J

• 38 J

• 30 J

• 36 J

The batteries in the photo are

• connected in series

• connected in parallel

• open

• arranged together

How much work is done to transfer 0.15 C of charge through an electric potential difference of 9.0 V?

 

• 0.016V

• 1.35J

• 60J

• 1.35V

A 12 V battery does 1200 J of work transferring charge. How much charge is transferred?

• 14400C

• 100C

• 0.01C

• 1212C