Physics-
General
Easy
Question
A steel ball falls slowly through water than through air because
- there is no surface tension
- density of air is low
- upthrust of air is low
- viscosity of air is low
The correct answer is: viscosity of air is low
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A road is 10 m wide. Its radius of curvature is 50 m. The outer edge is above the lower edge by a distance of 1.5 m. This road is most suited for the velocity.
A road is 10 m wide. Its radius of curvature is 50 m. The outer edge is above the lower edge by a distance of 1.5 m. This road is most suited for the velocity.
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A particle is moving in a horizontal circle with constant speed. It has constant :
A particle is moving in a horizontal circle with constant speed. It has constant :
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The graph shows the change ' ' 
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Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speed are such that each makes a complete circle in the same duration of time t. The ratio of the angular speed of the first to the second car 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
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The acceleration of connector as a function of x
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Physics-General
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A wire frame as shown in figure is made to rotate about a vertical axis passing through O. There exists a uniform horizontal magnetic field of induction B = 1 Tesla if 
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4rad/s, the potential difference between O & B is
A wire frame as shown in figure is made to rotate about a vertical axis passing through O. There exists a uniform horizontal magnetic field of induction B = 1 Tesla if If the frame rotates (slowly) about 'O' with angular velocity directed along Z-axis having magnitude 4rad/s, the potential difference between O & B is
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There exists a uniform but time varying magnetic field B = a + bt normal to plane of paper in a cylindrical region as shown. A rectangular conducting loop is placed as shown. Induced emf in branches AB and BC are
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In given figure, a wire loop has been bent so that it has three segments: segment ab (a quarter circle), bc (a square corner), and ca (straight). Here are three choices for a magnetic field through the loop:
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In given figure, a wire loop has been bent so that it has three segments: segment ab (a quarter circle), bc (a square corner), and ca (straight). Here are three choices for a magnetic field through the loop:
Where is in milliteslas and t is in seconds. If the induced current in the loop due to are respectively then
physics-General
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Three wire loops and an observer are positioned as shown in the figure. From the observer's point of view, a current I flows counterclockwise in the middle loop, which is moving towards the observer with a velocity v. Loops A and B are stationary. This same observer would notice that
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At t = 0 a charge q is at the origin and moving in the y-direction with velocity 
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physics-General
