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Physics

CAIE2024

(cid:44)(cid:1)(cid:1)(cid:1)(cid:1)(cid:9)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:2)(cid:6)(cid:44) (i) Determine the radius, in cm, of the sphere. radius = .................................................... cm [1] (ii) Calculate the charge on the sphere. charge = ...................................................... C [3] (iii) Suggest an explanation for the fact that the electric field inside the sphere is zero. ........................................................................................................................................... ........................................................................................................................................... ..................................................................................................................................... [1] [Total: 10] © UCLES 2024 (cid:300) (cid:300) (cid:207) (cid:236) (cid:266) (cid:187) (cid:190) (cid:251) (cid:288) (cid:206) (cid:180) (cid:299) (cid:237) (cid:278) (cid:200) (cid:299) (cid:245) (cid:225) (cid:207) (cid:262) (cid:298) (cid:265) (cid:197) (cid:256) (cid:266) (cid:209) (cid:221) (cid:293) (cid:249) (cid:228) (cid:181) (cid:217) (cid:258) (cid:288) (cid:215) (cid:258) 9702/42/O/N/24 [Turn over (cid:293)(cid:245)(cid:293)(cid:213)(cid:181)(cid:277)(cid:293)(cid:277)(cid:181)(cid:245)(cid:197)(cid:261)(cid:197)(cid:181)(cid:197)(cid:181)(cid:245)(cid:213) NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD PMT * 0000800000016 *

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Physics

CAIE2024

Qq electrical potential energy E = P 4rf r

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Physics

CAIE2024

(cid:44)(cid:1)(cid:1)(cid:1)(cid:1)(cid:9)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:2)(cid:4)(cid:44) (ii) State an expression, in terms of Q, x and the permittivity of free space ε, for the electric

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Physics

CAIE2024

( = 8.99 × 109 m F–1) 4rf

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Physics

CAIE2024

Qq electrical potential energy E = P 4rf r

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Physics

CAIE2024

(a) State Coulomb’s law. ................................................................................................................................................... ................................................................................................................................................... ............................................................................................................................................. [2] (b) Fig. 6.1 shows an isolated hollow conducting sphere that is positively charged. + + + + + + + + Fig. 6.1 On Fig. 6.1, draw field lines to represent the electric field outside the sphere. [3] (c) Fig. 6.2 shows the variation of the electric field strength E with distance x from the centre of the sphere in (b).

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Physics

CAIE2024

( = 8.99 × 109 m F–1) 4rf

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Physics

CAIE2024

Qq electrical potential energy E = P 4rf r

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Physics

CAIE2024

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Physics

Edexcel2024

Turn over PMT Questions 4 and 5 refer to two small positively charged spheres S and S suspended by threads,

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Physics

Edexcel2024

The electrostatic force between the two charges is initially F. The charge on S is doubled whilst the charge on S is unchanged. The distance between

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Physics

Edexcel2024

0 × 106 V m−1 and the air becomes conducting for a short time. (i) Calculate the minimum potential difference across the plates for sparks to be created. distance between parallel plates = 2.0 mm (2) ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... Minimum potential difference = ....................................................... (ii) Explain why the voltmeter reading decreases significantly whenever sparks are produced. (3) ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................... (Total for Question 15 = 10 marks) *P74468A01324* 

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Physics

Edexcel2024

Coulomb law constant k = = 8.99 × 109 N m2 C−2 4πε

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Physics

CAIE2024

E at point P due to the two spheres. E = ......................................................... [2] [Total: 10] © UCLES 2024 (cid:300) (cid:300) (cid:211) (cid:224) (cid:266) (cid:189) (cid:190) (cid:251) (cid:288) (cid:210) (cid:180) (cid:296) (cid:237) (cid:287) (cid:200) (cid:266) (cid:245) (cid:229) (cid:207) (cid:240) (cid:298) (cid:237) (cid:197) (cid:219) (cid:266) (cid:265) (cid:221) (cid:291) (cid:249) (cid:216) (cid:183) (cid:225) (cid:256) (cid:272) (cid:215) (cid:258) 9702/43/O/N/24 [Turn over (cid:293)(cid:213)(cid:181)(cid:277)(cid:245)(cid:277)(cid:261)(cid:277)(cid:261)(cid:181)(cid:213)(cid:261)(cid:197)(cid:181)(cid:229)(cid:245)(cid:229)(cid:213) NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD PMT * 0000800000014 *

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Physics

CAIE2024

( = 8.99 × 109 m F–1) 4rf

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Physics

Edexcel2023

Coulomb law constant k = = 8.99 × 109 N m2 C−2 4πε

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Physics

CAIE2022

Q (cid:72)(cid:79)(cid:72)(cid:70)(cid:87)(cid:85)(cid:76)(cid:70) (cid:83)(cid:82)(cid:87)(cid:72)(cid:81)(cid:87)(cid:76)(cid:68)(cid:79) V = 4rf r

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Physics

CAIE2022

( = 8 .99 × 109(cid:3031)(cid:80)(cid:3031)(cid:41)– 1) 4rf

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Physics

Edexcel2022

A point object has a charge +Q. Which of the following diagrams shows equipotential lines differing by a constant potential difference, and electric field lines around the object? A B C D (Total for Question 8 = 1 mark) 

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Physics

Edexcel2022

99 × 109 × 8.8 × 10 −13  8.8 × 10 −13  C r = 8.99 × 109  4 × 1.6 × 10 −19 × 79 × 1.6 × 10 −19 

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Physics

Edexcel2022

79  ×  D r = 8.99 × 109  8.8 × 10 −13  (Total for Question 9 = 1 mark)

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Physics

Edexcel2022

Coulomb law constant k = = 8.99 × 109 N m2 C−2 4πε

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Physics

Edexcel2021

Coulomb law constant k = = 8.99 × 109 N m2 C−2 4πε

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Physics

Edexcel2020

Coulomb law constant k = = 8.99 × 109 N m2 C−2 4πε

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Physics

Edexcel2020

The distance between a proton and an electron is r. The electrostatic force is F. The distance between the proton and electron is doubled. Which of the following is equal to the electrostatic force at this separation? A 2F F B

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Physics

CAIE2016

(a) State the relation between electric fi eld strength E and potential V. ................................................................................................................................................... .............................................................................................................................................. [2] (b) Two positively charged metal spheres A and B, of diameters 18 cm and 12 cm respectively, are isolated in space, as shown in Fig. 6.1.

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Physics

CAIE2016

State, qualitatively, and explain the variation with distance of the force on a proton placed at point P where x varies from x = 10 cm to x = 41 cm. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [6] [Total: 8] © UCLES 2014 9702/04/SP/16 [Turn over PPMMTT

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Physics

CAIE2016

( = 8.99 (cid:117)(cid:3)109 m F–1) 4(cid:83)(cid:72)

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