Mention five differences between an electromagnet and permanent magnet. [5

Question

Mention five differences between an electromagnet and permanent magnet. [5 MARKS]

Answer:
:
Each point: 1 Mark

\begin{matrix} E l e c t r o m a g n e t & P e r m a n e n t m a g n e t 1. I t i s a t e m p o r a r y m a g n e t a n d c a n b e d e m a g n e t i z e d & 1. I t i s a p e r m a n e n t m a g n e t a n d c a n n o t b e d e m a g n e t i z e d e a s i l y 2. M a g n e t i c s t r e n g t h c a n b e c h a n g e d & 2. I t s s t r e n g t h i s f i x e d 3. I t s p o l a r i t y c a n a l s o b e c h a n g e d & 3. I t s p o l a r i t y i s f i x e d 4. I t i s p r e p a r e d f r o m s o f t i r o n & 4. I t i s p r e p a r e d f r o m h a r d s t e e l 5. D i r e c t i o n o f m a g n e t i c f i e l d c a n b e r e v e r s e d & 5. D i r e c t i o n o f m a g n e t i c f i e l d c a n n o t b e r e v e r s e d 6. M a g n e t i c f i e l d i s p r o d u c e d w h e n e l e c t r i c c u r r e n t f l o w s . & 6. E l e c t r i c c u r r e n t i s n o t r e q u i r e d t o p r o d u c e m a g n e t i c f i e l d . \end{matrix}

Was this answer helpful ?

Next Question

More Questions on This Topic :

Question 1. Draw the circuit diagram to represent the circuit shown in Fig. Will the bulb glow? [3 MARKS]....

Question 2. On what factors does the amount of heat produced in a conducting wire depend and what is the working principle of an ele....is the working principle of an electric bulb? [3 MARKS]

Question 3. Name a safety device used in the electric circuit. What is the function of safety device? [2 MARKS] ....

Question 4. What is the working principle of an electric heater? On which factors does the amount of heat produced depends? ....which factors does the amount of heat produced depends? [3 MARKS]

Question 5. (a) Name and explain any two effects of electric current. (b) When current flows through a wire, a comp....kept nearby gets deflected from its north-south position. Explain. [5 MARKS]

Question 6. (a) For the arrangement shown below, what should be done to change the direction in which the magnetic needle gets de....pattern of magnetic field around a current carrying conductor? [2 MARKS]

Question 7. Why should we not touch a lighted bulb? Which phenomenon is responsible for it? [2 MARKS] ....

Question 8. What is the heating effect of electric current? Give few real-life examples where it is used. ....

Question 9. What is an electromagnet? Give two methods by which we can increase the strength of magnetic field produced by a circula....magnetic field produced by a circular coil carrying current? [4 MARKS]

Question 10. Name the instrument used to measure electric current. [1 MARK] ....

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI

Tabulation - Test Paper 2 Data Interpretation Reasoning & DI

Test Paper 1 Direction Sense Test Reasoning & DI

ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0

GFM Combined 1 Free Revision Test SAIL JO E-0