Quick questions on Electrical sources and internal resistance: emf and lost volts - SQA Higher Physics

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

Show answer

A cell has emf

1.5\ \text{V}

and internal resistance

0.40\ \Omega

. It supplies a current of

0.60\ \text{A}

. Calculate the terminal potential difference.

What is q2?

Show answer

State what the terminal voltage equals when no current is drawn from a source. [1 mark]

What is q3?

Show answer

A graph of terminal voltage against current has a

V

-intercept of

9.0\ \text{V}

and a gradient of

-1.5\ \text{V A}^{-1}

. State the emf and the internal resistance. [2 marks]

Have a question we have not covered?

This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.

All PhysicsQ&A pages