CIE Physics Paper-1: Specimen Questions 101 - 103 of 109

Question number: 101

MCQ▾

Question

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?

Circuit diagram for adjust the brightness of bulb.

Circuit diagram for adjust the brightness of bulb.

Figure shows the circuit diagram for adjust the brightness of bulb.

Choices

Choice (4) Response
a.
 Symbol of voltmeter (Choice a)

Symbol of voltmeter (Choice a)

Figure shows the symbol of voltmeter

b.
Symbol of resistor box (Choice b)

Symbol of resistor box (Choice b)

Figure shows the symbol of resistor box

c.
Symbol of variable resistor (Choice c)

Symbol of variable resistor (Choice c)

Figure shows the symbol of variable resistor

d.
Symbol of fuse (Choice d)

Symbol of fuse (Choice d)

Figure shows the symbol of fuse

Answer

c.

Explanation

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

MCQ▾

Question

How many nucleons are in a nucleus of 1939K ?

Choices

Choice (4) Response
a.

39

b.

19

c.

58

d.

20

Answer

a.

Explanation

In 1939K , 19 represent the number of protons in 1939K nucleus, and 39 represent numbers of protons and neutrons in potassium nucleus. Therefore numbers of nucleons in a nucleus of 1939K is 39.

Question number: 103

MCQ▾

Question

A beam of cathode rays passes through an electric field between two parallel plates.

A beam of cathode inserted between two parallel plates

A beam of cathode inserted between two parallel plates

Figure shows a beam of cathode rays passes through an electric field between two parallel plates.

In which direction is the beam deflected?

Choices

Choice (4) Response
a.

out of the page

b.

towards the bottom of the page

c.

towards the top of the page

d.

into the page

Answer

c.

Explanation

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.

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