Physics

Physics past questions and answers from WAEC and JAMB

Page 48

In homes, electrical appliances and lamps are connected in parallel because

Less current will be used

Less voltage will be used

Parallel connection does not heat up the wires

Series connection uses high voltage

Which of the following quantities are dimensionally independent?
I. dielectric constant
II. momentum
III. efficiency
IV. refractive index

I and II

II, III and IV

I, II, III and IV

I, III and IV

What is the equivalent of 20K in Celsius scale?

293°C

68°C

36°C

20°C

The electrochemical equivalent of silver is 0.0012g/C. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0 minutes, the current must be

6000A

100A

10A

First