1
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A solenoid of one metre length and 3.55 cm inner diameter carries a current of 5 A . If the solenoid consists of five closely packed layers each with 700 turns along its length, then the magnetic field at its centre is

A

22 mT

B

44 mT

C

35 mT

D

15 mT

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The work done in rotating a bar magnet which is initially in the direction of a uniform magnetic field through $45^{\circ}$ is $W$. The additional work to be done to rotate the magnet further through $15^{\circ}$ is

A

$\frac{W}{\sqrt{2}}$

B

$\frac{W}{2}$

C

$W \sqrt{2}$

D

2 W

3
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When a current of 4 mA passes through an inductor, if the flux linked with it is $32 \times 10^{-6} \mathrm{Tm}^2$, then the energy stored in the inductor is

A

$64 \times 10^{-9} \mathrm{~J}$

B

$32 \times 10^{-9} \mathrm{~J}$

C

$128 \times 10^{-9} \mathrm{~J}$

D

$96 \times 10^{-9} \mathrm{~J}$

4
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a series resonant LCR circuit, for the power dissipated to become half of the maximum power dissipated, the current amplitude is

A

$\frac{1}{\sqrt{2}}$ times its maximum value.

B

$1 / 2$ times its maximum value.

C

twice its maximum value.

D

$\sqrt{2}$ times its maximum value.