1
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The relation between $\mu$ and $H$ for a specimen of iron is $\mu=\left[\frac{1.4}{H}+12 \times 10^{-4}\right] \mathrm{Hm}^{-1}$. The value of $H$ which produces flux density of 1 T will be ( $\mu=$ magnetic permeability, $H=$ magnetic intensity)
A
$250 \mathrm{Am}^{-1}$
B
$500 \mathrm{Am}^{-1}$
C
$750 \mathrm{Am}^{-1}$
D
$10^3 \mathrm{Am}^{-1}$
2
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
In a circuit the current falls from a 14 A to 4 A in a time 0.2 ms . If the induced emf is 150 V , then the self-inductance of the circuit is
A
6 H
B
6 mH
C
3 mH
D
3 H
3
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
An alternating current is given by $i=(3 \sin \omega t+4 \cos \omega t) \mathrm{A}$. The rms current will be
A
$\frac{7}{\sqrt{2}} \mathrm{~A}$
B
$\frac{1}{\sqrt{2}} \mathrm{~A}$
C
$\frac{5}{\sqrt{2}} \mathrm{~A}$
D
$\frac{3}{\sqrt{2}} \mathrm{~A}$
4
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
For plane electromagnetic waves propagating in the positive $z$-direction. The combination which gives the correct possible direction for $\mathbf{E}$ and $\mathbf{B}$ fields respectively is
A
$(-2 \hat{\mathbf{i}}-3 \hat{\mathbf{j}})$ and $(3 \hat{\mathbf{i}}-2 \hat{\mathbf{j}})$
B
$(3 \hat{i}+4 \hat{j})$ and $(4 \hat{i}-3 \hat{j})$
C
$(\hat{\mathbf{i}}-2 \hat{\mathbf{j}})$ and $(-2 \hat{\mathbf{i}}-\hat{\mathbf{j}})$
D
$(-2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}})$ and $(\hat{\mathbf{i}}+2 \hat{\mathbf{j}})$
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