Processing math: 100%




12345>>
1.

In Young's double-slit experiment, the central point on the screen is


A) bright

B) dark

C) First bright and then dark

D) first dark and then bright



2.

In Young's double-slit experimental setup if the wavelength alone is doubled, the bandwidth β becomes


A) β2

B) 2β

C) 3β

D) β



3.

 The work done by an uniform magnetic field on a moving charge is


A) zero because F acts parallel to v

B) positive because F acts perpendicular to v

C) zero because F acts perpendicular to v

D) negative because F acts parallel to v



4.

The current in the 1Ω resistor shown in the circuit is

832021548_download.png


A) 23 A

B) 3A

C) 6A

D) 2A



5.

Tube A has both ends open while tube B has one end closed, otherwise, they are identical. The ratio of the fundamental frequency of tube 'A and B' is


A) 1 : 2

B) 1 : 4

C) 2 : 1

D) 4 : 1



12345>>