MCAT Physics Chpter-7, MCAT Physics Chpter-7

MCAT Physics chapter wise notes, ECAT PHYSICS Notes chapter wise, free notes for entry test, free MCAT MCQS PHYSICS, free notes download for entry test preparation, Physics intermediate notes chapter wise free download

Physics Notes for MCAT, Physics notes for ECAT.

1.	An oscillatory motion takes place under the action of
	a)	An applied force	b)	Gravitational force	c)	Restoring force and inertia	d)	All of these
2.	Simple harmonic motion is a type of
	a)	Linear motion	b)	Angular motion	c)	Circular motion	d)	None of these
3.	The wave form of a body executing simple harmonic motion
	a)	Square wave	b)	Sine wave	c)	Circular wave	d)	pulse
4.	When the displacement of an oscillator is one half of its amplitude, the ratio of its potential energy to the total energy is
	a)	½	b)	1/4	c)	1/8	d)	1
5.	Two springs of spring constants 1500 Nm-1 and 3000 Nm-1 respectively are stretched with the same force.the potential energy stored in the two springs is in the ratio
	a)	4:1	b)	1:4	c)	2:1	d)	1:2
6.	In which of the following are all the three quantities constant during the motion of an un damped simple harmonic oscillator?
	a)	Acceleration, force,total energy	b)	Amplitude , angular frequency, accelration	c)	angular frequency,acceleration ,force	d)	totenergy,angular frequency,amplitude
7.	The tension in the string of of simple pendulum is
	a)	constant	b)	Zero at mean position	c)	Maximum at the extreme position	d)	Maximum at mean position
8.	In case of forced oscillations,the resonance becomes sharp when
	a)	Restoring force is small	b)	Applied periodic force is small	c)	Daming force is small	d)	none
9.	To double the frequency of a spring mass oscillator,we have to
	a)	Decrease mass four times	b)	Increase mass four times	c)	Increase mass two times	d)	Decrese mass two times
10.	The frequency of a seconds pendulum is
	a)	2 Hz	b)	1 Hz	c)	0.5 Hz	d)	1.5Hz
11.	The force responsible for the vibratory motion of the pendulum is
	a)	tension	b)	mgsinθ	c)	mgcosθ	d)	mg
12.	The force which provide the energy to the damped oscillator
	a)	weight	b)	Damping force	c)	Driving force	d)	Frictional force
13.	Microwave  ovens produce frequency of
	a)	2450 KHz	b)	245 MHz	c)	2450MHz	d)	24.50MHz
14.	Time period of pendulum in vacuum depends
	a)	Mass of bob	b)	Length of pendulum	c)	Length and g	d)	None of these
15.	Damping can
	a)	Increase energy	b)	Decrease energy	c)	Both can do	d)	No effect
16.	By dividing a spring into two equal parts then it spring constant of each part
	a)	Also halved	b)	Becomes double	c)	Remain same	d)	None of these

17.	Acceleration and velocity of simple harmonic motion is
	a)	Directly proportional	b)	Inversely proportional	c)	No relation		d)	None of these
18.	A vibrating body shoot out its mean position due to
	a)	Its inertia	b)	Momentum gained	c)	Both of these		d)	Restoring force
19.	Resonance has units similar to
	a)	Frequency	b)	Amplitude	c)	Have no units		d)	none
20.	Restoring force is a
	a)	Constant force	b)	Variable force	c)	d)	Both possible
21.	Which of the following does not work according to resonance
	a)	T.V	b)	radio	c)	Microwave oven		d)	bulb
22.	The distance covered by a body in one complete vibration is 20 cm. what is the amplitude of  body
	a)	10 cm	b)	5 cm	c)	15 cm		d)	7.5 cm
23.	In case of simple pendulum ,the cause of damping is
	a)	Drag force of air	b)	gravity	c)	Tension in string		d)	all
24.	Graphical representation of simple harmonic motion is similar to
	a)	AC	b)	DC	c)	Both		d)	None of these
25.	Simple harmonic motion and uniform circular motion is………of each other
	a)	Opposite	b)	Replica	c)	Different		d)	All true
26.	If we move simple pendulum upward from earth and down to earth in which direction more decrease in time  period is observed
	a)	Upward	b)	Downward	c)	Same in both directions		d)	None of these
27.	Sharpness of resonance curve is …….related to damping
	a)	Directly			b)	Inversely
	c)	Both possible			d)	None of these
28.	To double the time period of pendulum, we have to make length
	a)	Double	b)	4 times	c)	No change		d)	Half
29.	The length of second pendulum is
	a)	100 cm	b)	99 cm	c)	98 cm		d)	99.2 cm
30.	The SI unit for spring constant is identical with
	a)	force	b)	pressure	c)	Surface tension		d)	loudness