The diagram shows a soft iron core coiled with wire. When the switch is turned on, some of the iron nails are attracted. Which o f the fo llowing ways will make the soft iron core attract all the iron nails?
A
Decrease the number of turns in the coil.
B
Increase the number of turns in the coil.
C
Place the soft iron core outside the coil.
D
None of these
Text Solution
Verified by Experts
The correct Answer is:
B
The magnetic strength of the electromagnet increases by increasing number of turns per unit length and hence attracts more number of nails.
Topper's Solved these Questions
NSO QUESTION PAPER 2019-20 SET A
SCIENCE OLYMPIAD FOUNDATION |Exercise ACHIEVERS SECTION|2 Videos
NSO QUESTION PAPER 2018- 19 SET - B
SCIENCE OLYMPIAD FOUNDATION |Exercise ACHIEVERS SECTION|2 Videos
NSO QUESTION PAPER 2019-20 SET B
SCIENCE OLYMPIAD FOUNDATION |Exercise ACHIEVERS SECTION|2 Videos
Similar Questions
Explore conceptually related problems
The given figure shows a simple electric circuit that consists of a coil of wire wounded around an iron rod. Some iron filings are placed near one end of the rod. When the switch is closed, some iron filings get attracted towards the rod. The iron filings will get attracted towards the iron rod
Identify the types of forces in each of the following Which force makes an iron to be attracted by magnet?
State whether the following statements are true or false. A magnet can attract an iron nail- from a distance.
A constant current is maintained in a resistive solenoid having iron rod as its core. Which of the following quantities will change when iron rod is removed from solenoid?
When current flows through the coil, the iron rod is attracted downward because the
Consider the following statements : 1. The magnetic pole in the northern hemisphere is the north magnetic pole. 2. At all points on a magnet, an iron bar gets attracted. Which one of the following statements given above is/are correct ?
Why is soft iron preferred for making the core of a transformer?
SCIENCE OLYMPIAD FOUNDATION -NSO QUESTION PAPER 2019-20 SET A-ACHIEVERS SECTION
