Archive for the ‘IOE INTRANCE’ Category

IOE 9807724256

Posted: July 26, 2013 in IOE INTRANCE

Q.1

A Carnot engine working between 300 K and 600 K has a work output of 800 J per cycle. The amount of heat energy supplied to the engine from the source in each cycle is

800 J

1600 J

3200 J

6400 J
Q.2

The temperature of the sink of a Carnot engine is 27o C. If the efficiency of the engine is 25 %, the temperature of the source is

227o C

327o C

127o C

27o C
Q.3

A refrigerator with its power on, is kept in a closed room with its door open, the temperature of the room

Rise

Fall

Remains the same

Depends on area of the room

Q.4

A gas expends 0.25 m3 constant pressure 10 m3 N/m2 , the work done is

2.5 x 10-7 J

250 J

250 W

250 N
Q.5

If the system undergoes contraction of volume, then the workdone by the system is

Positive

Negative

Negligible

Zero
Q.6

Water is boiling in a flask over a burner. To reduce its boiling temperature one must

Reduce the surrounding temperature

Connect the mouth of the flask to an evacuating system

Supply heat from a very intense heat source

Close the container with an airtight cork

Copyright © 2013 Entrance Studies all rights reserved. pramod 9807724256

IOE MODEL QUESTIONS HERE

Posted: July 26, 2013 in IOE INTRANCE

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IOE

Posted: July 26, 2013 in IOE INTRANCE

Q.1

A person is sitting near the edge of a rotating platform. When he walks towards the center, then

moment of inertia of system increases

angular velocity of platform decreases

angular velocity of platform increases

angular velocity of platform remains unchanged
Q.2

When a sphere rolls without slipping the ratio of its kinetic energy of translation to its total kinetic energy is

1 : 7

1 : 2

2 : 5

5 : 7
Q.3

A wheel of mass 10 kg has a moment of inertia of 160 kg – m2 about its own axis. The radius of gyration is

10 m

4 m

5 m

6 m
Q.4

When a steady torque is acting on a body, it

continues in its state of rest or uniform motion along a straight line

gets linear acceleration

gets angular acceleration

rotates at a constant speed
Q.5

When a particle is rotating in a plane about a fixed point its angular momentum is directed along

the radius

the tangent to orbit

line at an angle of 45o to the plane of rotation

the axis of rotation

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IOE ENTANCE PRACTICE HERE

Posted: July 26, 2013 in IOE INTRANCE

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Q.1

The period of revolution of planet A around the sun is 8 times that of B. The distance of A from the sun is how many times greater than that of B from the sun?

2

3

4

5
Q.2

The orbital velocity of an artifical satellite in a circular orbit just above the earth surface is v. For a satellite orbiting at an altitude of half of the earth’s radius, the orbital velocity is

3v / 2

v√(3/2)

v√(2/3)

2/3 v
Q.3

If ve and v0 represent the escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, than

ve a= v0

ve = √2 v0

ve = v0 / √2

ve and v0 are not related
Q.4

The time period of a satellite in a circular orbit of radius R is T, the period of another satellite in a circular orbit of radius 4 R is

4 T

T / 4

8T

T / 8
Q.5

Two plants of radii R1 and R2 are made from the same material. The ratio of the acceleration of gravity g1 / g2 at the surfaces of the two planets is

R1 / R2

R2 / R1

(R1 / R2 )2

(R2 / R1 )2

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Two stars of mass 2*10^30 kg each are approaching each are other for a head on collision. the speed of star is negligible when they are at a distance 10^9 km. The speed of each star during their collision if radius of each star is 10^4 km.

combined form of sequence and series and complex number
5 answer
May 29 2013 5:10AM zzsuman

If three complex number are in A.P then they lie in a

a) same circle

b) same straight line

c) same curve

d) both a and c

ionic equilibrium
1 answer
May 26 2013 9:54AM forrestgump

2.5 ml of 2/5 weak monoacidic base (Kb= 1×10-12at 250c) is titrated with 2/15 M HCL in water at 250c. The concentration of H+ at equivalence point is (Kw= 1×10-14) is

a)3.7×10-13M

B)3.2×10-7M

C)3.2×10-2M

d)2.7×10-2M

Determine the tension in the rope at a distance x from the ceiling…
6 answer
May 24 2013 6:59AM estudies

A heavy block of mass M hangs in equilibrium at the end of a rope of mass m and length l connected to a ceiling. Determine the tension in the rope at a distance x from the ceiling.

velocity of transverse wave
5 answer
May 23 2013 11:39AM Subin shrestha

The linear density of a string is 10-2 kg/m. If a transverse wave y = 0.5 sin200t travels in the string, the tension required is……….

a)8
b)16
c)32
d)64

Sequence and Series
14 answer
May 20 2013 12:12PM xuz

The sum of the following is:

1+3-5+7+9-11+13…………………… 3n terms

a. 2n2+3n

b. 5n2+2

c. 3n2-4n

d. 3n2

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