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# A wheel of radius ‘r’ and mass ‘m’ stands in front of a step of height 'h’ The least horizontal force which should be applied to the axle of the wheel to allow it to raise onto the step is

## The correct answer is:

### Applying the condition of rotational equilibrium,

But

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### The order of differential equation is

### The order of differential equation is

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### Two condensers, one of capacity and the other of capacity , are connected to a volt battery , as shown. The work done in charging fully both the condensers is

### Two condensers, one of capacity and the other of capacity , are connected to a volt battery , as shown. The work done in charging fully both the condensers is

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### A cubical block of side ‘L’ rests on a rough horizontal surface with coefficient of friction ‘m’ A horizontal force F is applied on the block as shown. If the coefficient of friction is sufficiently high so that the block does not slide before toppling, the minimum force required to topple the block is

### A cubical block of side ‘L’ rests on a rough horizontal surface with coefficient of friction ‘m’ A horizontal force F is applied on the block as shown. If the coefficient of friction is sufficiently high so that the block does not slide before toppling, the minimum force required to topple the block is

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### If the time period of a pendulum is 1 sec, then what is the length of the pendulum at point of intersection of l-T and graph

### If the time period of a pendulum is 1 sec, then what is the length of the pendulum at point of intersection of l-T and graph

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### Order and degree of differential equation are

### Order and degree of differential equation are

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### The solution of is

### The solution of is

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### For the given figure, calculate zero correction.

### For the given figure, calculate zero correction.

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### Three capacitors are connected as shown in the figure to a battery of volt. If the capacitor breaks down electrically the change in total charge on the combination of capacitors is

### Three capacitors are connected as shown in the figure to a battery of volt. If the capacitor breaks down electrically the change in total charge on the combination of capacitors is

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### The charge deposited on capacitor the circuit is

### The charge deposited on capacitor the circuit is

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### If then y satisfies

### If then y satisfies

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### In the figure, a proton moves a distance d in a uniform electric field E as shown in the figure. Does the electric field do a positive or negative work on the proton? Does the electric potential energy of the proton increase or decrease?

### In the figure, a proton moves a distance d in a uniform electric field E as shown in the figure. Does the electric field do a positive or negative work on the proton? Does the electric potential energy of the proton increase or decrease?

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### Solution of is

### Solution of is

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### Two charges and are placed 30 cm apart, as shown in the figure. A third charge is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is where k is

### Two charges and are placed 30 cm apart, as shown in the figure. A third charge is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is where k is

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### Figure shows three spherical and equipotential surfaces A, B and C round a point charge q. The potential difference. If and be the distance between them. Then

### Figure shows three spherical and equipotential surfaces A, B and C round a point charge q. The potential difference. If and be the distance between them. Then

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### Charges +q and –q are placed at points A and B respectively which are a distance apart, C is the mid-point between A and B. The work done in moving a charge+ along the semicircle CRD is

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