CIE Physics Paper-1: Specimen Questions 101 - 103 of 109
Question number: 101
An electrical component is to be placed in the circuit at X, to allow the brightness of the lamp to be varied from bright to dim. What should be connected at X?
Here in circuit we want the brightness of the lamp to be varied from bright to dim
And for that we have to connect variable resistance because using variable resistance we can very current and then we can control the brightness of lamp.
Question number: 102
How many nucleons are in a nucleus of ?
In , 19 represent the number of protons in nucleus, and 39 represent numbers of protons and neutrons in potassium nucleus. Therefore numbers of nucleons in a nucleus of is 39.
Question number: 103
A beam of cathode rays passes through an electric field between two parallel plates.
In which direction is the beam deflected?
out of the page
towards the bottom of the page
towards the top of the page
into the page
Cathode rays carries negative charges, so when it passes through two plates as shown in figure positively charged plate attract this beam of cathode rays, therefore it deflected towards the top of the page.