| 1 |
When a mass attached to a spring begins to move left or right from the equilibrium position, its P.E.:
|
A. Increases
B. Decreases
C. Remains constant
D. None of these
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| 2 |
Blood pressure is measured in torr. Which of the following units could belong to torr?
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A. N m-1
B. N m-2
C. N m
D. N-1m-2
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| 3 |
Teh consumption of energy by a 1000 watt heater in half an hour is:
|
A. 5 Kwh
B. 0.5 Kwh
C. 2.5 Kwh
D. 3.2 Kwh
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| 4 |
For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as
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A. modification
B. voltage
C. current
D. resistance
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| 5 |
An induced current can be produced by:
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A. Constant magnetic field
B. Changing magnetic field
C. Varying magnetic feild
D. Constant electric field
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| 6 |
A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
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A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
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| 7 |
When you drop a ball it acceleerates at 9.8 m/sex. If you instead throw it downward then it accelerates immediately after leaving your hand assuming no air resistance.
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A. 9.8
B. More than 9.8
C. Less than 9.8
D. Depending throwing speed
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| 8 |
The circuit which is used to smooth the output voltage of the full-wave rectification is known as
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A. transformer
B. rectifier
C. filter
D. none of these
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| 9 |
A 2 kg block is held 1 m above floor for 50 seconds. The work done is:
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A. Zero
B. 10.2 J
C. 100 J
D. 980 J
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| 10 |
A body whose momentum is constant must have constant
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A. Acceleration
B. Velocity
C. Force
D. None of these
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| 11 |
The most suitable material for permanent magnet is
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A. cobalt
B. iron
C. steel
D. alaminium
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| 12 |
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
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A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
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| 13 |
The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is
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A. very high
B. very low
C. constant
D. zero
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| 14 |
An object undergoes S.H.M has maximum speed when its displacement from the mean position is
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A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
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| 15 |
The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
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A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
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| 16 |
The velocity of light in vacuum can be changed by changing
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A. Frequency
B. Amplitude
C. Wavelength
D. None of these
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| 17 |
A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
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A. 5
B. 0.5
C. 0.005
D. 50
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| 18 |
The graph showing the variation of displacement with time is a:
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A. Sine curve
B. Straight line
C. Parabola
D. None of these
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| 19 |
The waves in which the particles of the medium have displacement along the direction of propagation of waves are called
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A. longitudinal waves
B. transverse waves
C. non-mechanical waves
D. none of them
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| 20 |
Peak value of alternative current is:
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A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
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| 21 |
A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:
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A. The coil is destroyed
B. The coil is Rotated
C. The coil is neither destroyed nor rotated
D. Both (A) and (B)
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| 22 |
The e/m of an electron moving in a circular path in a magnetic field is equal to
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A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
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| 23 |
The charge carriers in gases are
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A. electrons
B. ions
C. protons
D. ions and electrons
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| 24 |
If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is
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A. 360 m/s
B. 306 m/s
C. 331 m/s
D. 340 ms
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| 25 |
When the pn-junction is in reversed biased, current flows through the junction due to the
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A. majority carriers
B. minority carriers
C. either of them
D. none of them
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| 26 |
The fluid which is incompressible and non viscous is called
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A. Ideal fluid
B. Non-ideal fluid
C. Prefect fluid
D. All
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| 27 |
In Bernoulli's theorem the relation between velocity and pressure is
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A. Inverse
B. Direct
C. None of the above
D. Both a and b
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| 28 |
A particle of mass 0.5 g moving along x-axis is located of x1= 15 m at t1= 5s and x2= 33 m at t2= 13s its average velocity is
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A. 6 m s-1
B. 2.45 m s-1
C. 2.25 m s-1
D. 4.45 m s-1
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| 29 |
Work is a:
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A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
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| 30 |
The magnitude of resultant of three vectors is 3. Its x-component is one, y-component is two, then its z-component is:
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A. 0
B. 1
C. 2
D. 3
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