Question # 1

If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:

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Power

Work

Pressure

None of these

For making cooking utensils, which of the following pairs of properties is most suited?

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Low specific heat and high conductivity

Low specific heat and low conductivity

High specific heat and high conductivity

High specific heat and low conductivity

The work is stored in the inductor as

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Electric potential energy

Elastic potential energy

Magnetic energy

Absolute potential energy

Electric intensity at a place due to a charged conductor is a

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Scalar quantity

Vector quantity

Semi vector and semi scalar

Dimensionless quantity

Both A and D are true

A ball is dropped downwards After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds

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25 m

20 m

50 m

9.8 m

Acceleration in a body is always produced in the direction of :

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Velocity

Weight

Force

Both B and C

The potential difference across each resistance in series combination is

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same

different

zero

none of these

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

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heat capacity

specific heat capacity

specific heat at constant volume

specific heat at constant pressure

The closed loop gain of the inverting amplifier is written as

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G = R₂/R₁

G = 1 + R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

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9.42 rad/sec

2.6 rev/sec

1.5 rev/sec

Both A and C

Two vectors to be combined have magnitudes of 60 N and 35 N. Pick the possible answer:

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100 N

70 N

20 N

Zero

A Carnot engine works between 600K and 300. If heat input is 100J then the output is

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300 J

400 J

50 J

56 J

When crest of one wave coincides with the trough of the other wave, it give rise to

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dispersion

constructive interference

destructive interference

polarization

Two positive point charges of 13 and 8 micro coulombs respectively are placed 10 cm apart in air. The work done to bring them 4 cm closer is

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zero

3.8 J

4.8 J

5.8 J

The blood flow is laminar at

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Normal blood pressure

Systolic blood pressure

Diastolic blood pressure

High blood presure

The torque is taken as positive when it is

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Clockwise

Anticlockwise

Both

None of these

Super conductors are materials like

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Alloys

Ceramic

Semiconductors

a and b

The electrical behavior of semiconductor depends on the material purity which is

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Sensitive

Extremely sensitive

Non-sensitive

None of these

A ball is thrown with a speed of 30 ms^-1in a direction 30° with the ground. What is its vertical height?

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115 m

1.15 m

11.5 m

0.115 m

When the temperature difference between the source and the the sink increases, the efficiency of the heat engine will

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Increase

Decrease

Is not affected

May increase or decrease depending upon the nature of the working substance

Position vector is a vector which is drawn

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From one point to another

From origin to that point

Always from origin to that point

None of these

The S.I. unit of stress is also

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Force

Pascal

Momentum

None of these

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