1
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A compass needle oscillates 20 times per minute at a place where the dip is $$45^{\circ}$$ and the magnetic field is $$B_1$$. The same needle oscillates 30 times per minute at a place where the dip is $$30^{\circ}$$ and magnetic field is $$B_2$$. Then, $$B_1: B_2$$ is

A
$$9 \sqrt{3}: 4 \sqrt{2}$$
B
$$4 \sqrt{2}: 9 \sqrt{3}$$
C
$$3 \sqrt{3}: 2 \sqrt{2}$$
D
$$2 \sqrt{2}: 3 \sqrt{3}$$
2
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A plane electromagnetic wave travels in free space along $$Z$$-axis. At a particular point in space, the electric field along $$X$$-axis is $$8.7 \mathrm{~Vm}^{-1}$$. The magnetic field along $$Y$$-axis is

A
$$2.9 \times 10^{-8} \mathrm{~T}$$
B
$$3 \times 10^{-6} \mathrm{~T}$$
C
$$8.7 \times 10^{-6} \mathrm{~T}$$
D
$$3 \times 10^{-5} \mathrm{~T}$$
3
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A coil of inductance 0.1 H and resistance $$110 \Omega$$ is connected to a source of 110 V and 350 Hz . The phase difference between the voltage maximum and the current maximum is

A
$$\tan ^{-1}(1.5)$$
B
$$\tan ^{-1}(0.5)$$
C
$$\tan ^{-1}(1.73)$$
D
$$\tan ^{-1}(2)$$
4
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the average power per unit area delivered by an electromagnetic wave is $$9240 \mathrm{~Wm}^{-2}$$. then the amplitude of the oscillating magnetic field in EM wave is

A
$$4.4 ~\mu \mathrm{T}$$
B
$$6.6 ~\mu \mathrm{T}$$
C
$$8.8~ \mu \mathrm{T}$$
D
$$102 ~\mu \mathrm{T}$$
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