Question # 1

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

According to classical theory the proposed circular path of an electron in Rutherford model of atom will be

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Circular

Straight line

Parabolic

Spiral

A piece of fuse wire melts when a current of 15 ampere flows through it.

With this current, if it dissipates 22.5 W, the resistance of fuse wire will be

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Zero

10 ohm

1 ohm

0.10 ohm

The unit of inductance is equivalent to

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V x s/A

V x A/s

A x s/v

V/A x s

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

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Increas

Decreases

Remain the same

First A then B

Steel is preferred for making springs over copper. Why?

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Steel is cheaper

Young's modulus of steel is more than that of copper

Young's modulus of copper is more than that of steel

Steel is less likely ot be oxidized

Angular momentum is

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Vector (axial)

Vector (polar)

Scalar

None of these

A force of 10N is acting along y-axis. Its component along x-axis is

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10N

20N

100N

Zero N

A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is

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Equal to unity

Equal to 1.33

Between unity and 1.33

Greater than 1.33

A particle moving in a magnetic field has increase in its velocity, then its radius of the circle

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Decreases

Increases

Remains the same

Becomes half

In case of p-n junction diode, at high value of reverse bias, the current rises sharply. The value of reverse bias is known as:

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Cut off voltage

Zener voltage

Inverse voltage

Critical voltage

Ball pen function on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tension

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is

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25

225

625

1250

All of the following statements are correct except

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The total focal length of astronomical telescope is the sum of the focal lengths of its two lenses

The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent

The magnification of an astronomical telescope can increases by decreasing the focal length of the eyepiece

The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye piece

A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if

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The mass of the pendulum is increased

The mass of the pendulum is decreased

The length of the pendulum is increased

The length of the pendulum is decreased

The mass of a proton is 1847 times that of an electron. An electron and a proton are projected into a uniform electric field in a direction at right angles to the direction of the field with the same initial kinetic energy.The

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Both the trajectories will be equally curved

The proton trajectory will be less curved than the electron trajectory

The electron trajectory will be less curved than the proton trajectory

The relative curving of the trajectories will be dependent on the value of the initial kinetic energy

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