Sawaal
75
Q:

The core of an electromagnet is made of soft iron because soft iron has 

A) small susceptibility and small retentivity B) large susceptibility and small retentivity
C) large density and large retentivity D) small density and large retentivity

Answer:   B) large susceptibility and small retentivity



Explanation:
Subject: Physics
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An object, starting from rest, moves with constant acceleration of 4 m/s2. After 8 s, its speed is

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A) J s-1   B) J s
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5 23045
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A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

 

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