Deck 19: Physics Terminology

Question 1

At higher energy, the bodies have

A)small mass
B)large mass
C)zero mass
D)smaller weight

Answer 1

large mass

Question 2

Time taken by a radioactive substance to decay half is called

A)time delay
B)half life
C)time constant
D)half period

Answer 2

half life

Question 3

Most stable isotope in nature is of

A)iron-56
B)carbon-12
C)uranium-235
D)uranium-238

Answer 3

iron-56

Question 4

Activity of one decay per second is equal to

A)1 Bq
B)1 atm
C)1 mol
D)1 Cd

Question 5

The greater the decay constant

A)the less the activity
B)the greater the activity
C)the greater the size
D)the less the size

Question 6

Total amount of mass and energy together in a system is

A)increasing
B)decreasing
C)zero
D)constant

Question 7

Process by which energy is released in sun is

A)fission
B)Haber's process
C)fusion
D)radioactivity

Question 8

Minimum energy required to pull nucleus apart is called

A)ionization energy
B)electron affinity
C)chemical energy
D)binding energy

Question 9

Mass excess for U-235 is

A)0.034 u
B)0.043 u
C)0.05 u
D)0.06 u

Question 10

As compared to proton, mass of neutron is

A)10% greater
B)5% greater
C)1% greater
D)0.1% greater

Question 11

1 mole of uranium-238 has potential to emit total energy equal to about

A)109 J
B)1010 J
C)1011 J
D)1012 J

Question 12

If energy is released from a system, it's mass

A)decreases
B)increases
C)constant
D)zero

Question 13

New nucleus after alpha particle decays, is called

A)parent nucleus
B)daughter nucleus
C)decayed nucleus
D)undecayed nucleus

Question 14

If nucleus is formed from separate nucleons, then energy is

A)gained
B)released
C)converted
D)absorbed

Question 15

Maximum displacement from equilibrium position is

A)frequency
B)amplitude
C)wavelength
D)period

Question 16

Displacement-time graph depicting an oscillatory motion is

A)cos curve
B)sine curve
C)tangent curve
D)straight line

Question 17

In s.h.m, velocity at equilibrium position is

A)minimum
B)constant
C)maximum
D)zero

Question 18

Natural frequency of a guitar string can be changed by changing it's

A)area
B)diameter
C)length
D)stiffness

Question 19

Over-damping results in

A)slower return to equilibrium
B)faster return to equilibrium
C)equilibrium is never achieved
D)arrhythmic return to equilibrium

Question 20

Our eyes detect the oscillations up to

A)8 Hz
B)9 Hz
C)6 Hz
D)5 Hz

Question 21

For s.h.m, maximum speed is proportional to

A)wavelength
B)acceleration
C)time
D)frequency

Question 22

A force that acts to return the mass to it's equilibrium position is called

A)frictional force
B)restoring force
C)normal force
D)contact force

Question 23

In cars, springs are damped by

A)shock absorbers
B)engine
C)tyres
D)brake pedals

Question 24

If time period of an oscillation is 0.40 s, then it's frequency is

A)2 Hz
B)2.5 Hz
C)3 Hz
D)3.5 Hz

Question 25

As amplitude of resonant vibrations decreases, degree of damping

A)increases
B)remains same
C)decreases
D)varies