1
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
A thin semicircular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B, as shown in the figure.

AIPMT 2014 Physics - Electromagnetic Induction Question 23 English
The potential difference developed across the ring when its speed is $$v$$, is
A
zero
B
$${{Bv\pi {r^2}} \over 2}$$ and P is at higher potential
C
$$\pi rBV$$ and R is at higher potential
D
2rBV and R is at higher potential
2
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are
A
300 V, 15 A
B
450 V, 15 A
C
450 V, 13.5 A
D
600 V, 15 A
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
Light with an energy flux of 25 $$ \times $$ 104 W m$$-$$2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 cm2, the average force exerted on the surface is
A
1.25 $$ \times $$ 10$$-$$6 N
B
2.50 $$ \times $$ 10$$-$$6 N
C
1.20 $$ \times $$ 10$$-$$6 N
D
3.0 $$ \times $$ 10$$-$$6 N
4
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
A beam of light of $$\lambda = 600$$ nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between first dark fringes on either side of the central bright fringe is
A
1.2 cm
B
1.2 mm
C
2.4 cm
D
2.4 mm
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