Q.1 pls explain with method TALLENTEX
CLASS-X / paper Code - S
SECTION - A : PHYSICS
nis section contains 15 Multiple Choice Questions. Each question has four choices (I), (2), (3) and (4) out
of which ONLY ONE is correct.
diagram shows the variation of air pressure from an alarm siren at particular instant. The speed
of sound in the air is 340 m's.
What is the period of alarm siren?
(I) 0.98 ms
(2) 1.2 ms
(3) 2.35 ms
(4) 2.9 ms
Speed cameras are used to detect motorists who break the speed limit. A number Of lines 2 m apart
are painted on the road. AS a speeding Car Crosses the painted lines, the Camera takes two
photographs, 0.5 second(s) apart.
The speed of the car in the photographs is
(1) 10 m/s
(2) 14 m/s
An electric bulb rated 220 V, 60 W is working at full efficiency. Another identical bulb is connected
across the mains as shown
What is the total power ?
(1) 20 w
(2) 40 w
(3) 30 w
(4) 60 w
The diagram Shows a bar magnet placed in a uniform magnetic field. When the magnet is allowed
to move freely, it Will
(I) remain stationary
(3) tum 900 anti • clockwise
CLASS-X/ paper Code - S
(2) turn 900 clock—wise
(4) turn 1800 clerkwise