KCET Engineering | 2016
Q. Nature of equipotential surface for a point charge is:
1. Sphere with charge at the center of the sphere
2. Sphere with charge on the surface of the sphere
3. Plane with charge on the surface
4. Ellipsoid with charge at foci
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Q. Four rods with different radii r and length l are used to connect two heat reservoirs at different temperature. Which one will conduct most heat?
1. r=1cm, l=1m
2. r=1cm, l=12m
3. r=2cm, l=2m
4. r=2cm, l=12m
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Q. Four metal plates are arranged as shown. Capacitance between X and Y is (A Area of each plate, d distance between the plates)

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Q. A particle executing SHM has a maximum speed of 0.5ms1 and maximum acceleration of 1ms2.
The angular frequency of oscillation is:

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Q. A body falls freely for 10sec. Its average velocity during this journey (take g=10ms2):
1. 100ms1
2. 10ms1
3. 50ms1
4. 5ms1
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Q. A proton is projected with a uniform velocity 'v' along the axis of a current carrying solenoid. Then:
1. The proton path will be circular about the axis.
2. The proton will be accelerated along the axis.
3. The proton move along helical path.
4. The proton will continue to move with velocity 'v' along the axis.
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Q. Variation of resistance of the conductor with temperature is as shown
The temperature co-efficient (α) of the conductor is

1. Rom
2. mRo
3. mRo
4. m2Ro
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Q. Maximum acceleration of the train in which a 50kg box lying on its floor will remain stationary is(Given : Co-efficient of static friction between the box and the train's floor is 0.13 and g=9.8ms2):
1. 5.0ms2
2. 3.0ms2
3. 15ms2
4. 1.5ms2
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Q. A capacitor of 8F is connected as shown. Charge on the plates of the capacitor is

1. 40C
2. 32C
3. 80C
4. 0C
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Q. In the cyclotron, as radius of the circular path of the charged particle increases (ω= angular velocity, v= linear velocity)
1. Both ω and v increases
2. v increases, ω remains constant
3. v increases, ω decreases
4. ω only increases, v remains constant
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Q. A spring is stretched by applying a load to its free end. The strain produced in the spring is
1. Shear
2. Longitudinal
3. Volumetric
4. Longitudinal and shear
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Q. A 12kg bomb at rest explodes into two pieces of 4kg and 8kg. If the momentum of 4kg piece is 20Ns, the kinetic energy of the 8kg piece is:
1. 25J
2. 50J
3. 20J
4. 40J
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Q. A pan filled with hot food cools from 94C to 86C in 2 minutes. When the room temperature is 20C. How long will it cool from 74C to 66C?
1. 2 minutes
2. 1.8 minutes
3. 2.8 minutes
4. 2.5 minutes
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Q. An ideal fluid flows through a pipe of circular cross section with diameter 5cm and 10cm as shown. The ratio of velocities of fluid at A and B is

1. 1:4
2. 4:1
3. 2:1
4. 1:2
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Q. Potential difference between A and B in the above circuit is:

1. 4V
2. 5.6V
3. 2.8V
4. 6V
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Q. A Carnot engine working between 300K and 400K has 800J of useful work. The amount of heat energy supplied to the engine from the source is
1. 2400J
2. 1200J
3. 3200J
4. 3600J
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Q. An electron of mass m, charge e falls through a distance h meter in a uniform electric field E.
Then, time of fall is:

1. t=2eEhm
2. t=2hmeE
3. t=2hmeE
4. t=2eEhm
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Q. Three bodies a ring (R), a solid cylinder (C) and a solid sphere (S) having same mass and same radius roll down the inclined plane without slipping. They start from rest, if vR, vC and vS are velocities of respective bodies on reaching the bottom of the plane, then:
1. vR=vC=vS
2. vR>vC>vS
3. vR=vC>vS
4. vR<vC<vS
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Q. In the following network potential at 'O'

1. 4V
2. 3V
3. 4.8V
4. 6V
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Q. If Eax and Eeq represents electric field at a point on the axial and equatorial line of a dipole. If points are at a distance r from the centre of the dipole, for ra:
1. Eax=Eeq
2. Eax=2Eeq
3. Eax=Eeq
4. Eeq=2Eax
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Q. Mobility of free electrons in a conductor is:
1. directly proportional to electron density
2. inversely proportional to relaxation time
3. directly proportional to relaxation time
4. inversely proportional to electron density
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Q. Two heating coils of resistances 10Ω and 20Ω are connected in parallel and connected to a battery of emf 12V and internal resistance 1Ω. The power consumed by them are in the ratio
1. 1:3
2. 1:4
3. 2:1
4. 4:1
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Q. A particle of mass 1gm and charge 1μC is held at rest on a frictional horizontal surface at distance 1m from a fixed charge 2mC. If the particle is released, it will be repelled. The speed of the particle when it is at a distance of 10m from the fixed charge will be:
1. 60ms1
2. 90ms1
3. 180ms1
4. 100ms1
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Q. Variation of acceleration due to gravity (g) with distance x from the centre of the earth is best represented by : (R Radius of the earth)

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Q. A source of sound is moving with a velocity of 50ms1 towards a stationary observer. The observer measures the frequency of sound as 500Hz. The apparent frequency of sound as heard by the observer when source is moving away from him with the same speed is (Speed of sound at room temperature 350ms1)
1. 666Hz
2. 177.5Hz
3. 400Hz
4. 375Hz
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Q. If there is only one type of charge in the universe, then what is the flux to the entire universe.
(E Electric field, ds Area vector)
1. Eds could not be defined
2. Eds0 on any surface
3. Eds= if charge is inside
4. Eds=0 if charge is outside, =qϵ0 if charge is inside
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Q. Effective resistance between A and B in the following circuit

1. 10Ω
2. 203Ω
3. 5Ω
4. 20Ω
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Q. The component of a vector r along x-axis will have a maximum value if:
1. r along +ve x-axis
2. r along +ve y-axis
3. r along -ve y-axis
4. r makes an angle of 45o with the x-axis
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Q. Three projectiles A, B and C are projected at an angle of 30o, 45o, 60o respectively. If RA, RB and RC are ranges of A, B and C respectively, then (velocity of projection is same for A, B and C):
1. RA=RB=RC
2. RA=RC>RB
3. RA<RB<RC
4. RA=RC<RB
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Q. Which of the points is likely position of the centre of mass of the system shown in the figure?

1. A
2. D
3. B
4. C
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