J physics 16

Which of the following waves is both transverse and mechanical?

A projectile is fired from the ground level with a velocity of 300ms^-1 at an angle of a 30° to the horizontal.
Calculate the time taken to reach the maximum height?
[g = 10ms^-2]

What force has to be exerted on a mass 60kg to give it an acceleration of 10ms^-2 vertically upwards?
[g = 10ms^-2]

Which of the following does Not use magnetic effect of current to function?

A body which weighs 50N in air displaces 3.7kg of water when partially immersed in water. Calculate the upthrust on the body?

A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him will be

Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 10⁶Nm^-2 with a volume of 10^-3m³.

[R = 8.3jmol^-1K^-1]

A charged particle is moving in a uniform magnetic field. if the direction of motion of the charged particle is parallel to the magnetic field, the path of the charge will

From the diagram above, the measuring accuracy of the micrometer screw gauge is

Which of the following is obtained when a magenta is mixed with green colour?

The rate of cooling of a heated quantity of liquid in an enclosure depends on the

A satellite revolving around the earth is kept on its orbit by

In the diagram above, the neutral point is at

A dynamo primarily converts

If the magnification of a virtual image formed by an object 10cm from a convex less is 3, then the focal length of the lens is

A wire of length 10m is cooled from 50°C to 10°C. Calculate the decrease in the length of the wire. [c = 3 x 10^-5K^-1]

A manometer is an instrument used for measuring

If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object

Which of the following statements is NOT correct?

The relative density of a liquid is the ratio of the

A train with an initial velocity of 20ms^-1 is subjected to a uniform deceleration of 2ms^-2. The time required to bring the train to a complete halt is

I.Chemical
II.Sound
III.Electricity

Which of the above forms of energy can directly be converted to light energy?

An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is

Vapour is said to be saturated on top of an enclosed liquid if _________

Which of the following statements is Not true about atoms?

Semiconductor is a class of solid whose conductivity increases with an increase in

The frequency of beats produced when two tunning forks of frequencies 258Hz and 270Hz are sounded close to each other

A metre rule is pivoted at its mid-point with a vertical force of 10N hanging from the distance 30cm from the mid-point. At what distance must a 15N force hang to balance the ruler horizontally?

A radioactive isotope has a decay constant of 10^-6s^-1.Calculate its half - life?

What is the angular magnification of a telescope having objective and eyepiece lenses of a focal lengths 30cm and 3cm respectively?

Myopic defects in the human eye can be corrected through the use of a

Which of the following electromagnetic waves has the shortest wavelength?

What will happen to the pressure of a gas if its temperature is reduced to -273°C?

Calculate the inductance of a coil of resistance 30Ω connected to a 100V a.c source if the coil draws an r.m.s current of 2A

What happens to a water pool on a day when the humidity of the air is very low?

A pool of water appears to be 1.00m deep when viewed vertically from above. What is the actual depth of the pool?

Which of the following statements about wave motion is correct?

Boiling occurs when the vapour pressure of a liquid is

An electron in a hydrogen atom makes a transition from the ground level to the third level. If the energy at the ground level. Calculate the energy at the third level.

[h = 6.6 x 10^-34Js; f = 10¹⁵Hz]

The impulse of a force is deduced from Newton's second law as

Which of the following instruments can be used to measure current in an a.c circuit?

A satellite moves in a circular orbit of radius 4R round the earth. The acceleration of the satellite in terms of g is

In the diagram above, which of the following velocity-time graphs shows uniform acceleration of a body from rest?

The heat required to raise a mass of a substance through 1K is known as

Shadows and eclipse result from the

A saturated vapour pressure of a liquid increases when the

The instrument used to view stars is the

When an athlete perspires after running, he loses heat through

In the diagram above, the direction of the force between N and S in the magnetic field is

Which of the following statements is correct about a machine?