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

The potential energy of a long spring when stretched by $$2 \mathrm{~cm}$$ is U. If the spring is stretched by $$8 \mathrm{~cm}$$, potential energy stored in it will be :

A
4U
B
8U
C
16U
D
2U
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?

A
p-n junction diodes
B
Capacitor
C
Load resistance
D
A centre-tapped transformer
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

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
$$4 ~\mu \mathrm{J}$$
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Change Language

If $$\oint_\limits{s} \vec{E} \cdot \overrightarrow{d S}=0$$ over a surface, then:

A
the magnitude of electric field on the surface is constant.
B
all the charges must necessarily be inside the surface.
C
the electric field inside the surface is necessarily uniform.
D
the number of flux lines entering the surface must be equal to the number of flux lines leaving it.
EXAM MAP