NMDCAT PHYSICS FLP-05 (SMART INSTITUTE)

01-An engine pump out 50 kg of water. If the water comes out vertically upwards with a velocity of 20 m/s. The power of engine is (take g=10 ms-2)

10 kW

1000 W

20 kW

10 MW

02-The graph of kinetic energy of the body versus velocity v is represented by as

03-The relationship between force and position is shown in the figure given (in one dimensional case). The work done by the force in displacing a body from x=1 cm to x=5 cm is:

60 ergs

700 ergs

70 ergs

20 ergs

04-When a person holding a pail by the force F is moving forward then the work being done on the pail is:

Maximum

Negative

Minimum

Zero

05-If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of the water at the turbine is ( g=9.8 ms-2)

9.8 m/s

19.6 m/s

39.6 m/s

98.0 m/s

06-A body moving with velocity v has momentum and kinetic energy numerically equal. What is the value of "v"

4 m/s

2 m/s

1.41 m/s

0.2 m/s

07-Work done on the body equals

Change in its K.E always

Change in its P.E always

Change in its K.E or change in its P.E

Neither change in K.E nor change in its P.E

08-A block of mass m is initially at rest is dropped from a height h onto a spring of force constant k. The maximum compression in the spring is x then

Mgh=1/2kx^2

Mg(h+x)=1/2k(x+h)

Mg(h+x)=1/2kx^2

Mgh=1/2k(x+h)^2

09-An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor (in Watts) is

200

10-A weight lifter lifts 300 kg from the ground to a height of 2 meter in 3 second. The average power generated by him is:

5880 W

4410 W

2205 W

1960 W

11-Two bodies of mass 10 kg and 5 kg moving in concentric orbits of radii R and r such that their periods are the same. Then the ratio between their centripetal acceleration is:

R/r

R^2/r^2

R/R

R^2/R^2

12-The ratio of angular speeds of minute hand and hour hand of a watch is:

6:1

1;12

12:1

1:6

13-A string breaks if its tension exceeds 10 N. A stone of mass 250 gm tied to this string of length 10 cm is rotated in a horizontal circle. The maximum angular velocity can be

20 rad/s

100 rad/s

40 rad/s

200 rad/s

14-A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km/h. The centripetal force is

250 N

1200 N

750 N

1000 N

15-If a particle covers half the circle of radius R with constant speed then

Momentum change is mvr

Change in K.E is mv^2

Change in K.E is 1/2 mv^2

Change in K.E is zero

16-A stone ties to the end of a string 1m long is whirled in a horizontal circle, with a constant speed. If the stone makes 22 revolution in 44 s, what is the magnitude and direction of acceleration of the stone?

π^2/4 ms-2 and direction along the radius towards the centre

π^2 ms-2 and direction along the radius towards the centre

π^2 ms-2 and direction along the radius away the centre

π^2 ms-2 and direction along the tangent to the circle

17-For small θ, angular displacement is quantity

Scalar

Neither scalar nor vector

Vector

None

18-For positive angular displacement, the rotation would be:

Clockwise

Parallel

Anti-clockwise

Perpendicular

19-Radian is defined as angle subtended at the center of a circle by an

Arc whose length is parallel to the radius of circle

Arc whose length is less than the radius of circle

Arc whose length is greater than the radius of circle

Arc whose length is equal to the radius of circle

20-The rate of change in angular velocity is called:

Angular displacement

Angular velocity

Angular momentum

Angular acceleration

21-A particle executing S.H.M of period 4s. Then time taken by it to move from mean position to half the amplitude is:

1/3 s

1/5 s

2/3 s

4 s

22-In order to double the period of Simple pendulum:

Length should be double

Mass should be quadrupled

Mass should be double

Length should be quadrupled

23-A body performing simple harmonic motion has a displacement x given by the equation x=30 sin50t, where time in seconds. What is the frequency of oscillation?

0.020 Hz

0.13 Hz

8.0 Hz

30 Hz

24-Time taken by a S.H.O of time period 'T' to move from the mean position to the half of amplitude

T/4

T/8

T/12

T/6

25-A spring of force constant 'K' is cut into two pieces, such that one piece has double the length of the other. The

2/3K

3K/2

26-Time period of mass spring system executing S.H.M depends upon:

Mass of system

Force constant

Amplitude

Both a and b

27-The acceleration of a projection on the diameter for a particle moving along a circle is:

W^2x

Wx^2

W^2/x

28-What should be the length of simple pendulum whose period is 6.28 second at a place when g=10 m/s2

19.8 m

10.8 m

6.25 m

10 m

29-The force responsible for the vibratory motion of simple pendulum is (where θ is angle of string with vertical)

Mg cos θ

Mg tan θ

Mg sin θ

30-The maximum value of displacement in SHM is called

Frequency

Wavelength

Amplitude

Time period

31-A body performs SHM, with period 0.063sthe maximum speed is 3 m/s. What are values of amplitude and angular frequency 9rad/s0 is:

Xo=0.03 m, w=100

Xo=3.3 m, w=100

Xo=0.19, w=16

Xo=5.3m, w=16

32-In a SHM, the energy of the system:

Is independent of the amplitude

Is inversely proportional to the amplitude

Is directly proportional to the amplitude

Is proportional to the amplitude squared

33-The product of frequency and wavelength is equal to:

Speed of wave

Force

Time period

None of these

34-When the antinodes are all at their extreme displacements, the energy stored is:

K.E

Thermal Energy

P.E

All of these

35-The stationary longitudinal in a pipe closed at one end, only ............ Harmonics are present.

Even

Just multiple of 5

Odd

All of these

37-When one end of organ is closed, then the wavelength of stationary wave of any harmonic in it is given by:

λn=4l/n

λn=l/4n

λn=4n/l

λn=n/4l

38-The organ pipe which is open at both ends is:

Weaker in harmonics

No harmonics produce

Richer in harmonic

None of these

39-Stars moving towards earth shows

Blue shift

No shift

Red shift

May be blue or red depending upon speed of stars

41-First law of thermodynamics is related to:

Law of conservation of energy

Law of conservation of momentum

Law of conservation of mass

Law of conservation of charge

43-When Cp=20 J/kg K and 1 mole of gas is present then Cv is?

2.36 J/kg K

4.36 J/kg K

3.36 J/kg K

None

48-What will be change in internal energy when work done by the system is 50 kJ & heat absorbed is 40kJ.

90 kJ

190 kJ

-10 kJ

-190 kJ

49-An ideal gas as compared to a real gas at very high pressure occupies

More volume

Same volume

Less volume

None of above

NMDCAT PHYSICS FLP-05 (SMART INSTITUTE)

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