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

A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at $$30^{\circ}$$ with the horizontal. The horizontal component of the earth's magnetic field at the place is 0.3 G . Then the magnitude of the earth's magnetic field at the location is

A
$$\frac{\sqrt{3}}{5} G$$
B
$$\sqrt{3} \mathrm{G}$$
C
$$\frac{20}{\sqrt{3}} \mathrm{G}$$
D
$$\frac{2}{\sqrt{3}} \mathrm{G}$$
2
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A circular coil has 100 turns, radius 3 cm and resistance $$4 \Omega$$. This coil is co-axial with a solenoid of 200 turns/$$\mathrm{cm}$$ and diameter 4 cm . If the solenoid current is decreased from 2 A to zero in 0.04 s , then the current induced in the coil is

A
$$4 \pi^2 \mathrm{~mA}$$
B
$$8 \pi \mathrm{mA}$$
C
30.3 mA
D
45.5 mA
3
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Capacitive reactance of a capacitor in an AC circuit is $$3 \mathrm{k} \Omega$$. If this capacitor is connected to a new AC source of double frequency, the capacitive reactance will become.

A
$$1.5 \mathrm{k} \Omega$$
B
$$3 \mathrm{k} \Omega$$
C
$$6 \mathrm{k} \Omega$$
D
$$5.2 \mathrm{k} \Omega$$
4
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A light of intensity $$12 \mathrm{Wm}^{-2}$$ incidents on a black surface of area $$4 \mathrm{~cm}^2$$. The radiation pressure on the surface is

A
$$1 \times 10^{-8} \mathrm{~Pa}$$
B
$$4 \times 10^{-8} \mathrm{~Pa}$$
C
$$1.6 \times 10^{-7} \mathrm{~Pa}$$
D
$$4.8 \times 10^{-7} \mathrm{~Pa}$$
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