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The diagram shows a coil wound around a ...

The diagram shows a coil wound around a U shape soft iron bar AB.

Suggest one way to strengthen the magnetic field in the electromagnet.

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The strength of magnetic field can be increased by increasing the magnitude of current or by increasing the number of windings in the electromagnet.
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The diagram shows a coil wound around a U shape soft iron bar AB. What is the polarity induced at the ends A and B when the switch is pressed ?

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ICSE-SAMPLE PAPER 2018-SECTION-II
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  11. The diagram shows a coil wound around a U shape soft iron bar AB. ...

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  12. The diagram shows a coil wound around a U shape soft iron bar AB. ...

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  13. The diagram shows a coil wound around a U shape soft iron bar AB. ...

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  15. The ore of uranium found in nature contains ""(92)U^(238)and""(92)U^(2...

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  16. The ore of uranium found in nature contains ""(92)U^(238)and""(92)U^(2...

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