Mira did an investigation on how the number of coils around an electromagnet affected the number of paper-clips it picked up. She collected some results as shown in the given table. Number of coils Number of paper clips picked up 0 0 5 1 10 3 15 3 20 8 25 12 Plot a line of best fit on your graph but don't include the anomalous result.

The strength of the electromagnet can be changed by changing the number of turns in the coil and the current passing through the coil. Increasing the number of turns in the coil increases the strength of the magnetic field. Here in the given table as the number of turn in the coils increases from 10 to 15 but the number of paper clips picked up are remains same. Hence, 15 - 3 is the anomalous result of the given table. The graph without anomalous result is shown below. The blue line represents the given results and the red line represents the average with 2 clips for each 5 turns in a coil.

E M B I B E

Cambridge Lower Secondary Science Stage 8 : Student's book>Physics>Chapter 10 - Magnets>Exercise 8

Gemma Young and Mark Levesley Solutions for Exercise 8: Exercise 8

Author:Gemma Young & Mark Levesley

Gemma Young Science Solutions for Exercise - Gemma Young and Mark Levesley Solutions for Exercise 8: Exercise 8

Attempt the free practice questions from Exercise 8: Exercise 8 with hints and solutions to strengthen your understanding. Cambridge Lower Secondary Science Stage 8 : Student's book solutions are prepared by Experienced Embibe Experts.

Questions from Gemma Young and Mark Levesley Solutions for Exercise 8: Exercise 8 with Hints & Solutions

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 10 - Magnets>Exercise 8>Q 4

Mira did an investigation on how the number of coils around an electromagnet affected the number of paper-clips it picked up. She collected some results as shown in the given table.

Number of coils	Number of paper clips picked up
$0$	$0$
$5$	$1$
$10$	$3$
$15$	$3$
$20$	$8$
$25$	$12$

One of the result is anomalous. Which one?

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 10 - Magnets>Exercise 8>Q 4

Mira did an investigation on how the number of coils around an electromagnet affected the number of paper-clips it picked up. She collected some results as shown in the given table.

Number of coils	Number of paper clips picked up
$0$	$0$
$5$	$1$
$10$	$3$
$15$	$3$
$20$	$8$
$25$	$12$

Plot a line of best fit on your graph but don't include the anomalous result.

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 10 - Magnets>Exercise 8>Q 4

Mira did an investigation on how the number of coils around an electromagnet affected the number of paper-clips it picked up. She collected some results as shown in the given table.

Number of coils	Number of paper clips picked up
$0$	$0$
$5$	$1$
$10$	$3$
$15$	$3$
$20$	$8$
$25$	$12$

What conclusions can Mira draw from the results?

EASY

Lower Secondary Stage 8

IMPORTANT

Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 10 - Magnets>Exercise 8>Q 5

Lee changed both the number of coils and the current when he did his investigation. When he increased them both, he picked up more paperclips. Why can't he conclude that the number of coils affects the strength of the electromagnet.

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