Question

if we reverse the direction of the current in the circuit,the deflection in the compass Needle gets..............

A)reversed
B)Increased
C)decreased
D)none of these​

Answer 1

current in the circuit has the electromagnetic induction taking place in it. thus, a magnetic field is created which results in the deflection of thw compass needle in its direction.

if the current direction is reversed, therefore,

the answer is option:

A) reversed , because it aligns itself in the direction of magnetic field.

Answer 2

If we reverse the direction of the current in the circuit,the deflection in the compass Needle gets reversed

Explanation:

• If the battery is disconnected, the north end of the compass needle will point to magnetic north, as illustrated in figure 1-2(A) by the broken-line compass needle pointing to the right.
• When the battery is connected, current flows through the circuit and the compass needle aligns itself with the magnetic field of the conductor, as indicated by the solid compass needle.
• The strength of the magnetic field created around the conductor is dependent upon the amount of current.In figure 1-2(A), the resistance in the circuit is 6 ohms.
• With the 6-volt battery shown, current in the circuit is 1 ampere. In figure 1-2(B), the resistance has been changed to 12 ohms. With the 6-volt battery shown, current in the circuit is 1/2 or .5 ampere.
• The magnetic field around the conductor in figure 1-2(B)is weaker than the magnetic field around the conductor in figure 1-2(A). The compass needle in figure 1-2(B) does not move as far from magnetic north.
• If the direction of the current is reversed, the compass needle will move in the opposite direction because the polarity of the magnetic field has reversed.In figure 1-2(C), the battery connections are reversed and the compass needle now moves in the opposite direction.

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