1
NEET 2023
MCQ (Single Correct Answer)
+4
-1

The net magnetic flux through any closed surface is :

A
Positive
B
Infinity
C
Negative
D
Zero
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1

A $$12 \mathrm{~V}, 60 \mathrm{~W}$$ lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of $$220 \mathrm{~V}$$. Assuming the transformer to be ideal, what is the current in the primary winding ?

A
2.7 A
B
3.7 A
C
0.37 A
D
0.27 A
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1

An ac source is connected to a capacitor C. Due to decrease in its operating frequency

A
displacement current increases.
B
displacement current decreases.
C
capacitive reactance remains constant.
D
capacitive reactance decreases.
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1

The magnetic energy stored in an inductor of inductance $$4 ~\mu \mathrm{H}$$ carrying a current of $$2 \mathrm{~A}$$ is :

A
$$4 \mathrm{~mJ}$$
B
$$8 \mathrm{~mJ}$$
C
$$8 ~\mu \mathrm{J}$$
D
$$4 ~\mu \mathrm{J}$$
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