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General

Easy

Question

# A particle of mass is rotating in a horizontal circle of radius and is attached to a hanging mass as shown in the figure. The speed of rotation required by the mass keep steady is

## The correct answer is:

### To keep the mass *M* steady, let *T *is the tension in the string joining the two. Then for particle

For mass

From Eqs. (i) and (ii)

### Related Questions to study

physics-

### Figure shows the variation of the stopping potential (V_{0}) with the frequency (v) of theincident radiations for two different photosensitive material M_{1} and M_{2} .What are the values of work functions for M_{1} and M_{2} respectively

### Figure shows the variation of the stopping potential (V_{0}) with the frequency (v) of theincident radiations for two different photosensitive material M_{1} and M_{2} .What are the values of work functions for M_{1} and M_{2} respectively

physics-General

physics-

### The respective angles of the flint and crown glass prisms are and *A*. They are to be used for dispersion without deviation, then the ratio of their angles will be

Since

### The respective angles of the flint and crown glass prisms are and *A*. They are to be used for dispersion without deviation, then the ratio of their angles will be

physics-General

Since

physics-

### The two lines A and B shown in figure are the agraphs of the de Broglie wavelength l as function of (V is the accelerating potential) for two particles having the same charge

Which of the two represents the particle of heavier mass ?

### The two lines A and B shown in figure are the agraphs of the de Broglie wavelength l as function of (V is the accelerating potential) for two particles having the same charge

Which of the two represents the particle of heavier mass ?

physics-General

physics-

### In a photoelectric experiment anode potential is plotted against plate current

### In a photoelectric experiment anode potential is plotted against plate current

physics-General

physics-

### From an inclined plane two particles are projected with same speed at same angle , one up and other down the plane as shown in figure. Which of the following statements is/are correct?

Here,

Time of flight of is,

Time of flight of is,

So, . The acceleration of both the particles is downwards. Therefore, relative acceleration between the two is zero or relative motion between the two is uniform. The relative velocity of w.r.t. is towards , therefore collision will take place between the two in mid air.

Time of flight of is,

Time of flight of is,

So, . The acceleration of both the particles is downwards. Therefore, relative acceleration between the two is zero or relative motion between the two is uniform. The relative velocity of w.r.t. is towards , therefore collision will take place between the two in mid air.

### From an inclined plane two particles are projected with same speed at same angle , one up and other down the plane as shown in figure. Which of the following statements is/are correct?

physics-General

Here,

Time of flight of is,

Time of flight of is,

So, . The acceleration of both the particles is downwards. Therefore, relative acceleration between the two is zero or relative motion between the two is uniform. The relative velocity of w.r.t. is towards , therefore collision will take place between the two in mid air.

Time of flight of is,

Time of flight of is,

So, . The acceleration of both the particles is downwards. Therefore, relative acceleration between the two is zero or relative motion between the two is uniform. The relative velocity of w.r.t. is towards , therefore collision will take place between the two in mid air.

Physics-

### Two particles 1 and 2 are projected with same speed as shown in figure. Particle 2 is on the ground and particle 1 is at a height from the ground and at a horizontal distance from particle 2. If a graph is plotted between and for the condition of collision of the two then ( on -axis and on -axis

Assuming particle 2 to be at rest, substituting in

We have

or

Which is a straight line passing through origin with slope

We have

or

Which is a straight line passing through origin with slope

### Two particles 1 and 2 are projected with same speed as shown in figure. Particle 2 is on the ground and particle 1 is at a height from the ground and at a horizontal distance from particle 2. If a graph is plotted between and for the condition of collision of the two then ( on -axis and on -axis

Physics-General

Assuming particle 2 to be at rest, substituting in

We have

or

Which is a straight line passing through origin with slope

We have

or

Which is a straight line passing through origin with slope

physics-

### a) Name the experiment for which the adjacent graph, showing the variation of intensity of scattered electrons with the angle of scatter ing (q) was obtained.

b) Also name the important hypothesis that was confirmed by this experiment

### a) Name the experiment for which the adjacent graph, showing the variation of intensity of scattered electrons with the angle of scatter ing (q) was obtained.

b) Also name the important hypothesis that was confirmed by this experiment

physics-General

physics-

### Three identical particles are joined together by a thread as shown in figure. All the three particles are moving in a horizontal plane. If the velocity of the outermost particle is , then the ratio of tensions in the three sections of the string is

Let is the angular speed of revolution

### Three identical particles are joined together by a thread as shown in figure. All the three particles are moving in a horizontal plane. If the velocity of the outermost particle is , then the ratio of tensions in the three sections of the string is

physics-General

Let is the angular speed of revolution

physics-

### A ball of mass kg is attached to the end of a string having length 0.5 m. The ball is rotated on a horizontal circular path about vertical axis. The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in rad/s) is

component will cancel

Component will provide necessary centripetal force the ball towards center

Component will provide necessary centripetal force the ball towards center

*C.*### A ball of mass kg is attached to the end of a string having length 0.5 m. The ball is rotated on a horizontal circular path about vertical axis. The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in rad/s) is

physics-General

component will cancel

Component will provide necessary centripetal force the ball towards center

Component will provide necessary centripetal force the ball towards center

*C.*maths-

### The ellipse and the straight line y = mx + c intersect in real points only if

= 1

Þ (b

D > 0 Þ m

Þ (b

^{2}+ a^{2}m^{2}) x^{2}+ 2 mca^{2}x + a^{2}(c^{2 }- b^{2}) = 0D > 0 Þ m

^{2}c^{2}a^{4}- a^{2}(c^{2}- b^{2})(b^{2}+ a^{2}m^{2}) > 0 Þ b^{2}+ a^{2}m^{2}> c^{2}### The ellipse and the straight line y = mx + c intersect in real points only if

maths-General

= 1

Þ (b

D > 0 Þ m

Þ (b

^{2}+ a^{2}m^{2}) x^{2}+ 2 mca^{2}x + a^{2}(c^{2 }- b^{2}) = 0D > 0 Þ m

^{2}c^{2}a^{4}- a^{2}(c^{2}- b^{2})(b^{2}+ a^{2}m^{2}) > 0 Þ b^{2}+ a^{2}m^{2}> c^{2}Physics-

### A boy throws a cricket ball from the boundary to the wicket-keeper. If the frictional force due to air cannot be ignored, the forces acting on the ball at the position *X* are respected by

The forces acting on the ball will be (i) in the direction opposite to its motion frictional force and(ii) weight .

### A boy throws a cricket ball from the boundary to the wicket-keeper. If the frictional force due to air cannot be ignored, the forces acting on the ball at the position *X* are respected by

Physics-General

The forces acting on the ball will be (i) in the direction opposite to its motion frictional force and(ii) weight .

physics-

### Four capacitors are connected as shown in figure. The equivalent capacitance between and is

Capacitance between A and B

### Four capacitors are connected as shown in figure. The equivalent capacitance between and is

physics-General

Capacitance between A and B

physics-

### A frictionless track ends in a circular loop of radius figure. A body slides down the track from point which is at a height cm. Maximum value of for the body to successfully complete the loop is

For successfully completing the loop,

### A frictionless track ends in a circular loop of radius figure. A body slides down the track from point which is at a height cm. Maximum value of for the body to successfully complete the loop is

physics-General

For successfully completing the loop,

physics-

### In a circuit shown in figure, the potential difference across the capacitor of 2 F is

### In a circuit shown in figure, the potential difference across the capacitor of 2 F is

physics-General

physics-

### The effective capacitance between points and shown in figure. Assuming F and that outer capacitors are all F is

The arrangement shows a Wheatstone bridge.

As therefore the bridge is balanced.

Similarly,

effective capacitance

As therefore the bridge is balanced.

Similarly,

effective capacitance

### The effective capacitance between points and shown in figure. Assuming F and that outer capacitors are all F is

physics-General

The arrangement shows a Wheatstone bridge.

As therefore the bridge is balanced.

Similarly,

effective capacitance

As therefore the bridge is balanced.

Similarly,

effective capacitance