1
AIIMS 2017
MCQ (Single Correct Answer)
+1
-0.33

A specimen of silicon is to be made $$P$$-type semiconductor for this one atom of indium, on an average, is doped in $$5 \times 10^7$$ silicon atoms. If the number density of silicon is $$5 \times 10^{22}$$ atom/$$\mathrm{m}^3$$ then the number of acceptor atoms per $$\mathrm{cm}^3$$ will be

A
$$2.5 \times 10^{30}$$
B
$$1.0 \times 10^{13}$$
C
$$1.0 \times 10^{15}$$
D
$$2.5 \times 10^{36}$$
2
AIIMS 2017
MCQ (Single Correct Answer)
+1
-0.33

The angle of dip, if dip needle oscillating in vertical plane makes 40 oscillations per min in a magnetic meridian and 30 oscillations per minute in vertical plane at right angle to the magnetic meridian is

A
$$\theta=\sin ^{-1}(0.5625)$$
B
$$\theta=\sin ^{-1}(0.325)$$
C
$$\theta=\sin ^{-1}(0.425)$$
D
$$\theta=\sin ^{-1}(0.235)$$
3
AIIMS 2017
MCQ (Single Correct Answer)
+1
-0.33

Two batteries, one of emf $$18 \mathrm{~V}$$ and internal resistance $$2 \Omega$$ and the other of emf $$12 \mathrm{~V}$$ and internal resistance $$1 \Omega$$ are connected as shown. The voltmeter $$V$$ will record a reading of

AIIMS 2017 Physics - Current Electricity Question 3 English

A
14 V
B
15 V
C
18 V
D
30 V
4
AIIMS 2017
MCQ (Single Correct Answer)
+1
-0.33

The Young's double slit experiment is performed with blue and green light of wavelengths 4360 Å and 5460 Å respectively. If $$x$$ is the distance of 4th maxima from the central one, then

A
$$x_{\text {blue }}=x_{\text {green }}$$
B
$$x_{\text {blue }}> x_{\text {green }}$$
C
$$x_{\text {blue }}< x_{\text {green }}$$
D
$$x_{\text {blue }} / x_{\text {green }}$$
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