Physics - Section 1 | Multiple Questions and Answers

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Physics - Section 1 Multiple Questions and Answers.

21.	. Sound waves in air are

	A.	transverse
	B.	longitudinal
	C.	electromagnetic
	D.	polarised

22.	. Magnetism at the centre of a bar magnet is

	A.	minimum
	B.	maximum
	C.	zero
	D.	minimum or maximum

23.	It is more difficult to walk on a sandy road than on a concrete road because

	A.	sand is soft and concreter is hard
	B.	the friction between sand and feet is less than that between concrete and feet
	C.	the friction between sand and feet is more than that between concrete and feet
	D.	the sand is grainy but concrete is smooth

24.	Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

	A.	0.14 m/s
	B.	140 m/s
	C.	1.4 km/s
	D.	14 m/s

25.	Of the following properties of a wave, the one that is independent of the other is its

	A.	amplitude
	B.	velocity
	C.	wavelength
	D.	frequency

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