1
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

A wire of length $$L$$ metre carrying a current $$I$$ ampere is bent in the form of a circle. Magnitude of its magnetic moment is

A
$$\frac{L^2 I^2}{4 \pi}$$
B
$$\frac{L^2 I}{4 \pi}$$
C
$$\frac{L I}{4 \pi}$$
D
$$\frac{L I^2}{4 \pi}$$
2
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

What is the net force on the square coil?

AP EAPCET 2021 - 20th August Morning Shift Physics - Moving Charges and Magnetism Question 25 English

A
25 $$\times$$ 10$$^{-7}$$ N moving towards wire
B
25 $$\times$$ 10$$^{-7}$$ N moving away from wire
C
35 $$\times$$ 10$$^{-7}$$ N moving towards wire
D
35 $$\times$$ 10$$^{-7}$$ N moving away from wire
3
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a co-axial, straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero

A
outside the cable
B
inside the inner conductor
C
inside the outer conductor
D
in between the two conductors
4
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic field, of a given length of wire for single turn coil, at its centre is B, then its value for two turns coil for the same wire is

A
B/4
B
B/2
C
4B
D
2B
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